Toyota Camry 1983-1996 Repair Guide

Camshaft and Bearings

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REMOVAL & INSTALLATION



1C-LTC and 2CL-TC Engines

See Figures 1, 2, 3, 4 and 5

  1. Remove the timing belt covers and timing belt as detailed previously.
  2.  
  3. Unbolt and remove the camshaft oil seal retainer.
  4.  



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Fig. Fig. 1: Unbolt and remove the camshaft oil seal retainer

  1. Using a dial indicator mounted on the camshaft, measure and record the camshaft thrust clearance by moving the camshaft back and forth. The standard clearance is 0.0031-0.0071 inch (0.0787-0.180mm) and the maximum clearance is 0.0098 inch (0.25mm). If the thrust is greater than the maximum limit, replace the camshaft and/or the cylinder head.
  2.  



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Fig. Fig. 2: Checking camshaft thrust with a dial indicator

  1. Remove the bolts from the five camshaft bearing caps (a little at a time) and lift the camshaft from the cylinder head.
  2.  



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Fig. Fig. 3: Loosen and remove each bearing cap bolt a little at a time

  1. Remove the rubber half circle plug.
  2.  

To install:
  1. Clean and inspect the camshaft and camshaft bearings.
  2.  
  3. Apply sealant to the half circle plug and install it into the cylinder head.
  4.  
  5. Place the camshaft in the cylinder head.
  6.  
  7. Position the bearing caps so that number on the top of the cap is pointing toward the front.
  8.  



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Fig. Fig. 4: Install the bearing cap so the number is facing up, then tighten in several passes

  1. Install the cap bolts and tighten them gradually in two or three passes. On the final pass tighten the bolts to 13 ft. lbs. (18 Nm).
  2.  

If the camshaft or the cylinder head was replaced, the oil clearance and the thrust clearance must be checked.

  1. Inspect and adjust the valve clearance.
  2.  
  3. Coat the oil seal retainer with sealant and install it to the cylinder head.
  4.  



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Fig. Fig. 5: Apply sealant to the oil seal retainer

  1. Install the timing belt and covers.
  2.  
  3. Start the engine and inspect for leaks.
  4.  
  5. Check the engine idle and maximum idle speeds and adjust as necessary.
  6.  

2S-ELC Engines

See Figures 6, 7 and 8

The camshaft is located in the camshaft housing.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the valve cover.
  4.  
  5. Loosen the camshaft housing bolts gradually in the sequence shown in Cylinder Head Removal and Installation procedure.
  6.  


CAUTION
If the bolts are loosened out of sequence, warpage of the camshaft housing could occur.

  1. Position a small prybar between the cylinder head and camshaft housing projections, separate the camshaft housing from the cylinder head.
  2.  
  3. Once separated, lift the housing from the engine and place it on a clean work bench.
  4.  
  5. Using a spanner wrench, hold the camshaft pulley stationary and remove the pulley set bolt. Remove the pulley.
  6.  



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Fig. Fig. 6: Checking camshaft thrust clearance with a dial indicator

  1. Inspect the camshaft thrust clearance as follows:
    1. Mount a dial indicator (of recent calibration) to the pulley end of the camshaft.
    2.  
    3. Preload the dial indicator and zero it.
    4.  
    5. Move the camshaft back and forth by hand and record the thrust clearance. The standard thrust clearance is 0.0031-0.0090 inch (0.0787-0.228mm). Maximum thrust clearance is 0.0138 inch (0.35mm).
    6.  
    7. If the thrust is greater than the maximum limit, replace the camshaft and/or the camshaft housing.
    8.  

  2.  
  3. Remove the five bolts that attach the oil seal retainer to the housing. Remove the oil seal retainer and O-ring. Discard the O-ring.
  4.  
  5. With a slight twisting motion, slowly withdraw the camshaft from the camshaft housing. This must be done slowly to avoid damaging the housing.
  6.  



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Fig. Fig. 7: With a slight twist, carefully withdraw the camshaft from the housing

  1. With a gasket scraper and cleaning solvent, remove the old sealing material from the housing and head contact surfaces.
  2.  
  3. Inspect the camshaft and camshaft housing.
  4.  

To install:
  1. Good maintenance practice suggests that whenever a seal is removed or disturbed, it should be replaced. Replace the camshaft oil seal as follows:
    1. Tap the old seal from the retainer with a screwdriver and hammer.
    2.  
    3. Install the new seal by pressing it in with the proper size deep well socket.
    4.  
    5. Lubricate the new seal with multi-purpose grease.
    6.  

  2.  



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Fig. Fig. 8: It is very important to apply the sealant to the camshaft housing correctly

  1. Slowly insert the camshaft into the housing.
  2.  
  3. Clean the retainer bolts thoroughly with a wire brush to remove all the old sealant, grease or dirt.
  4.  
  5. Apply sealant to the last two or three threads of the bolt end.
  6.  
  7. Place the new O-ring into the retainer and attach the retainer with the five bolts. Tighten the bolts to 82 inch lbs. (9 Nm).
  8.  
  9. Remove any oil or grease from the camshaft pulley and then install it as previously detailed.
  10.  
  11. Apply a bead of sealant to the camshaft housing contact surface. Do not use too much sealant. The sealant hardens within 3 minutes after application. If the sealant hardens, it must be removed and re-applied.
  12.  
  13. Place the camshaft housing onto the cylinder head. Install the camshaft housing bolts. Tighten the bolts in three passes to 11 ft. lbs. (15 Nm) in the sequence shown in the Cylinder Head Removal and Installation section.
  14.  
  15. Install the head cover. Connect the negative battery cable. Start and warm up the engine. Inspect for leaks. Adjust the ignition timing and the idle speed.
  16.  

3S-FE and 5S-FE Engines

See Figures 9 thru 17

  1. Remove the cylinder head cover.
  2.  

Being that the thrust clearance on both the intake and exhaust camshafts is small, the camshafts must be kept level during removal. If the camshafts are removed without being kept level, the camshaft may be caught in the cylinder head causing the head to break or the camshaft to seize.



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Fig. Fig. 9: Exhaust camshaft removal sequence in passes

  1. To remove the exhaust camshaft proceed as follows:
    1. Set the knock pin of the intake camshaft at 10-45° BTDC of camshaft angle. This angle will help to lift the exhaust camshaft level and evenly by pushing No. 2 and No. 4 cylinder camshaft lobes of the exhaust camshaft toward their valve lifters.
    2.  
    3. Secure the exhaust camshaft sub-gear to the main gear using a service bolt. The manufacturer recommends a bolt 0.63-0.79 inch (16-20mm) long with a thread diameter of 6mm and a 1mm thread pitch. When removing the exhaust camshaft be sure that the torsional spring force of the sub-gear has been eliminated.
    4.  
    5. Remove the No. 1 and No. 2 rear bearing cap bolts and remove the cap. Uniformly loosen and remove bearing cap bolts No. 3 to No. 8 in several passes and in the proper sequence. Do not remove bearing cap bolts No. 9 and 10 at this time. Remove the No. 1, 2, and 4 bearing caps.
    6.  
    7. Alternately loosen and remove bearing cap bolts No. 9 and 10. As these bolts are loosened, check to see that the camshaft is being lifted out straight and level.
    8.  

  2.  

If the camshaft is not lifting out straight and level, retighten No. 9 and 10 bearing cap bolts. Reverse the order of Steps c through a and reset the intake camshaft knock pin to 10-45 ° BTDC and repeat Steps a through c again. Do not attempt to pry the camshaft from its mounting.

  1. Remove the No. 3 bearing cap and exhaust camshaft from the engine.
  2.  



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Fig. Fig. 10: Intake camshaft removal sequence in passes

  1. To remove the intake camshaft, proceed as follows:
    1. Set the knock pin of the intake camshaft at 80-115° BTDC of camshaft angle. This angle will help to lift the intake camshaft level and evenly by pushing No. 1 and No. 3 cylinder camshaft lobes of the intake camshaft toward their valve lifters.
    2.  
    3. Remove the No. 1 and No. 2 front bearing cap bolts and remove the front bearing cap and oil seal. If the cap will not come apart easily, leave it in place without the bolts.
    4.  
    5. Uniformly loosen and remove bearing cap bolts No. 3 to No. 8 in several phases and in the proper sequence. Do not remove bearing cap bolts No. 9 and 10 at this time. Remove No. 1, 3, and 4 bearing caps.
    6.  
    7. Alternately loosen and remove bearing cap bolts No. 9 and 10. As these bolts are loosened and after breaking the adhesion on the front bearing cap, check to see that the camshaft is being lifted out straight and level.
    8.  

  2.  

If the camshaft is not lifting out straight and level retighten No. 9 and 10 bearing cap bolts. Reverse Steps b through d, than start over from Step b. Do not attempt to pry the camshaft from its mounting.

  1. Remove the No. 2 bearing cap with the intake camshaft from the engine.
  2.  

To install:
  1. Before installing the intake camshaft, apply multi-purpose grease to the thrust portion of the camshaft.
  2.  



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Fig. Fig. 11: Place the intake camshaft at 80-115° BTDC of the camshaft angle on the cylinder head

  1. To install the intake camshaft, proceed as follows:
    1. Position the camshaft at 80-115° BTDC of camshaft angle on the cylinder head.
    2.  
    3. Apply sealant to the front bearing cap.
    4.  
    5. Coat the bearing cap bolts with clean engine oil.
    6.  
    7. Tighten the camshaft bearing caps evenly and in several passes to 14 ft. lbs. (19 Nm) in the proper sequence.
    8.  

  2.  



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Fig. Fig. 12: Intake bearing cap locations



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Fig. Fig. 13: Intake bearing cap bolt tightening sequence

  1. To install the exhaust camshaft, proceed as follows:
    1. Set the knock pin of the camshaft at 10-45° BTDC of camshaft angle.
    2.  
    3. Apply multipurpose grease to the thrust portion of the camshaft.
    4.  
    5. Position the exhaust camshaft gear with the intake camshaft gear so that the timing marks are in alignment with one another. Be sure to use the proper alignment marks on the gears. Do not use the assembly reference marks.
    6.  
    7. Turn the intake camshaft clockwise or counterclockwise little by little until the exhaust camshaft sits in the bearing journals evenly without rocking the camshaft on the bearing journals.
    8.  
    9. Coat the bearing cap bolts with clean engine oil.
    10.  
    11. Tighten the camshaft bearing caps evenly and in several passes to 14 ft. lbs. (19 Nm). Remove the service bolt from the assembly.
    12.  

  2.  



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Fig. Fig. 14: Set the knock pin of the intake camshaft at 10° BTDC of the camshaft angle



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Fig. Fig. 15: Engage the exhaust cam gear of the intake cam gear by matching the marks



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Fig. Fig. 16: Exhaust bearing cap locations



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Fig. Fig. 17: Exhaust camshaft bearing cap tightening sequence

  1. Install the head cover.
  2.  
  3. Start the engine and check for leaks.
  4.  
  5. Adjust the valves and the ignition timing.
  6.  

2VZ-FE and 3VZ-FE Engines

See Figures 18 thru 28

  1. Remove the cylinder head covers.
  2.  

Being that the thrust clearance on both the intake and exhaust camshafts is small, the camshafts must be kept level during removal. If the camshafts are removed without being kept level, the camshaft may be caught in the cylinder head causing the head to break or the camshaft to seize.

  1. To remove the exhaust camshaft from the right side cylinder head, proceed as follows:
    1. Turn the camshaft with a wrench until the two pointed marks on the drive and driven gears are aligned.
    2.  
    3. Secure the exhaust camshaft sub-gear to the main gear using a service bolt. The manufacturer recommends a bolt 0.63-0.79 inch (16-20mm) long with a thread diameter of 6mm and a 1mm thread pitch. When removing the exhaust camshaft be sure that the torsional spring force of the sub-gear has been eliminated (you guessed it; that's what the bolt is for!).
    4.  
    5. Remove eight bearing cap bolts and remove the caps. Uniformly loosen and remove bearing cap bolts in several passes and in the proper sequence.
    6.  
    7. Remove the exhaust camshaft from the engine.
    8.  

  2.  



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Fig. Fig. 18: Right exhaust camshaft bearing cap bolt loosening sequence



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Fig. Fig. 19: Right intake camshaft bearing cap bolt loosening sequence

  1. Uniformly loosen and remove the ten bearing cap bolts in several passes, in the sequence shown. Remove the bearing caps and oil seal and then lift out the intake camshaft.
  2.  
  3. To remove the exhaust camshaft from the left side cylinder head, proceed as follows:
    1. Turn the camshaft with a wrench until the pointed marks on the drive and driven gears are aligned.
    2.  
    3. Secure the exhaust camshaft sub-gear to the main gear using a service bolt. The manufacturer recommends a bolt 0.63-0.79 inch (16-20mm) long with a thread diameter of 6mm and a 1mm thread pitch. When removing the exhaust camshaft be sure that the torsional spring force of the sub-gear has been eliminated.
    4.  
    5. Remove eight bearing cap bolts and remove the caps. Uniformly loosen and remove bearing cap bolts in several passes and in the proper sequence.
    6.  
    7. Remove the exhaust camshaft from the engine.
    8.  

  4.  
  5. Uniformly loosen and remove the ten bearing cap bolts in several passes, in the sequence shown. Remove the bearing caps and oil seal and then lift out the intake camshaft.
  6.  



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Fig. Fig. 20: Left exhaust camshaft bearing cap bolt loosening sequence



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Fig. Fig. 21: Left intake camshaft bearing cap bolt loosening sequence



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Fig. Fig. 22: Arrange the bearing caps in order on a table

To install:
  1. Before installing the intake camshaft in the right side cylinder head, apply multi-purpose grease to the thrust portion of the camshaft.
  2.  
  3. To install the intake camshaft, proceed as follows:
    1. Position the camshaft at a 90° angle to the two pointed marks on the cylinder head.
    2.  
    3. Apply sealant to the No. 1 bearing cap.
    4.  
    5. Coat the bearing cap bolts with clean engine oil.
    6.  
    7. Tighten the camshaft bearing caps evenly and in several passes to 12 ft. lbs. (16 Nm) in the proper sequence.
    8.  

  4.  
  5. Apply multi-purpose grease to the thrust portion of the exhaust camshaft (right side head).
  6.  
  7. Position the camshaft into the head so that the two pointed marks are aligned on the drive and driven gears. Install the bearing caps and tighten the bolts to 12 ft. lbs. (16 Nm), in several passes, in the sequence shown.
  8.  
  9. Remove the service bolt.
  10.  
  11. Before installing the intake camshaft in the left side cylinder head, apply multi-purpose grease to the thrust portion of the camshaft.
  12.  



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Fig. Fig. 23: Right exhaust camshaft bearing cap bolt tightening sequence



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Fig. Fig. 24: Install the left side intake camshaft bearing caps



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Fig. Fig. 25: Left side intake camshaft bearing cap bolt tightening sequence



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Fig. Fig. 26: Install the right side intake camshaft bearing caps



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Fig. Fig. 27: Right side intake camshaft bearing cap bolt tightening sequence

  1. To install the intake camshaft, proceed as follows:
    1. Position the camshaft at a 90° angle to the pointed mark on the cylinder head.
    2.  
    3. Apply sealant to the No. 1 bearing cap.
    4.  
    5. Coat the bearing cap bolts with clean engine oil.
    6.  
    7. Tighten the camshaft bearing caps evenly and in several passes to 12 ft. lbs. (16 Nm) in the proper sequence.
    8.  

  2.  
  3. Apply multi-purpose grease to the thrust portion of the exhaust camshaft (left side head).
  4.  
  5. Position the camshaft into the head so that the pointed marks are aligned on the drive and driven gears. Install the bearing caps and tighten the bolts to 12 ft. lbs. (16 Nm), in several passes, in the sequence shown.
  6.  
  7. Remove the service bolt.
  8.  
  9. Install the head cover.
  10.  
  11. Start the engine and check for leaks.
  12.  
  13. Adjust the valves and the ignition timing.
  14.  



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Fig. Fig. 28: Install the right side exhaust camshaft bearing caps

1MZ-FE Engine

See Figures 29 thru 47

  1. Remove the timing belt and idler pulley.
  2.  
  3. Remove the camshaft timing pulleys.
  4.  
  5. Remove the cylinder head covers.
  6.  

The thrust clearance on both the intake and exhaust camshafts is very small; the camshafts must be kept level during removal. If the camshafts are removed without being kept level, the camshaft may be caught in the cylinder head, causing the head to break or the camshaft to seize.



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Fig. Fig. 29: View of the left cylinder head with exhaust (1) and intake (2) camshafts



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Fig. Fig. 30: Place a service bolt in the camshaft sub-gear to secure it

  1. To remove the exhaust and intake camshafts from the right side cylinder head:
    1. Turn the camshaft with a wrench until the 2 pointed marks drive and driven gears are aligned. (The right camshaft gears have 2 marks apiece; the left side camshaft gears have one mark each.)
    2.  
    3. Secure the exhaust camshaft sub-gear to the main gear using a service bolt. A bolt 0.63-0.79 in. (16-20mm) long with a 6mm thread diameter and a 1mm pitch is recommended. When removing the exhaust camshaft be sure the sub-gear is not loaded; all the force must be eliminated.
    4.  
    5. Uniformly loosen and remove the exhaust camshaft bearing cap bolts in several passes and in the proper sequence. Remove the eight bearing cap bolts and remove the caps, keeping them in the correct order.
    6.  
    7. Remove the exhaust camshaft from the engine.
    8.  
    9. Uniformly loosen and remove the 10 bearing cap bolts in several passes, in the proper sequence. Remove the bearing caps, keeping them in order, remove the oil seal and then lift out the intake camshaft.
    10.  

  2.  



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Fig. Fig. 31: Right intake camshaft bearing cap bolt loosening sequence



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Fig. Fig. 32: Right side exhaust camshaft bearing cap bolt loosening sequence



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Fig. Fig. 33: Lift the caps and bolts up and place in order of removal-intake camshaft shown



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Fig. Fig. 34: All bearing caps are marked with an E or I

  1. To remove the exhaust and intake camshafts from the left side cylinder head:
    1. Turn the camshaft with a wrench until the pointed marks on the drive and driven gears are aligned. (The right camshaft gears have 2 marks apiece; the left side camshaft gears have one mark each.)
    2.  
    3. Secure the exhaust camshaft sub-gear to the main gear using a service bolt. A bolt 0.63-0.79 inch (16-20mm) long with a 6mm thread diameter and a 1mm pitch is recommended. When removing the exhaust camshaft be sure the sub-gear is not loaded; all the force must be eliminated.
    4.  
    5. Uniformly loosen and remove the exhaust camshaft bearing cap bolts in several passes and in the proper sequence. Remove the eight bearing cap bolts and remove the caps. Keep the caps in the correct order.
    6.  
    7. Remove the exhaust camshaft from the engine.
    8.  
    9. Uniformly loosen and remove the 10 bearing cap bolts in several passes, in the reverse order of the installation sequence. Remove the bearing caps, keeping them in order, remove the oil seal and then lift out the intake camshaft.
    10.  

  2.  
  3. Remove the valve lifter shims and hydraulic lifters. Identify each lifter and shim as it is removed so it can be reinstalled in the same position. If the lifters are to be reused, store them upside down in a sealed container.
  4.  



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Fig. Fig. 35: Carefully lift the camshaft out and carry in the vertical position shown-intake camshaft shown



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Fig. Fig. 36: Left intake camshaft bearing cap bolt loosening sequence



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Fig. Fig. 37: Left side exhaust camshaft bearing cap bolt loosening sequence



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Fig. Fig. 38: Removing the left side exhaust camshaft

To install:
  1. Install the valve lifters into their original positions and install the shims. Check valve clearance and replace the shims as necessary.
  2.  
  3. When reinstalling, remember that the camshafts must be handled carefully and kept straight and level to avoid damage.
  4.  
  5. Before installing the camshafts in either cylinder head, apply multi-purpose grease to each camshaft.
  6.  
  7. To install the right camshafts:
    1. Position the intake camshaft on the head so that the alignment marks are at a 90 degree angle from vertical. The mark should be at the "3 o'clock" position.
    2.  
    3. Apply sealant to the No. 1 bearing cap.
    4.  
    5. Apply a light coat of clean engine oil to the bolt threads and under the bolt head. Install the bearing caps to their proper position. Tighten the bolts evenly and in several passes to 12 ft. lbs. (16 Nm) in the proper sequence.
    6.  
    7. Position the exhaust camshaft on the head so that the alignment marks are at a 90 degree angle from vertical. The mark should be at the " o'clock" position and must align with the marks on the other gear.
    8.  
    9. Apply a light coat of clean engine oil to the bolt threads and under the bolt head. Install the bearing caps to their proper position. Tighten the bolts evenly and in several passes to 12 ft. lbs. (16 Nm) in the proper sequence.
    10.  
    11. Remove the service bolt.
    12.  

  8.  
  9. To install the left camshafts:
    1. Position the intake camshaft on the head so that the alignment mark is at a 90 degree angle from vertical. The mark should be at the "9 o'clock'' position.
    2.  
    3. Apply sealant to the No. 1 bearing cap.
    4.  
    5. Apply a light coat of clean engine oil to the bolt threads and under the bolt head. Install the bearing caps to their proper position. Tighten the bolts evenly and in several passes to 12 ft. lbs. (16 Nm) in the proper sequence.
    6.  
    7. Position the exhaust camshaft on the head so that the alignment marks are at a 90 degree angle from vertical. The mark should be at the "3 o'clock'' position and must align with the marks on the other gear.
    8.  
    9. Apply a light coat of clean engine oil to the bolt threads and under the bolt head. Install the bearing caps to their proper position. Tighten the bolts evenly and in several passes to 12 ft. lbs. (16 Nm) in the proper sequence.
    10.  
    11. Remove the service bolt.
    12.  

  10.  
  11. Apply multi-purpose grease to new camshaft oil seals. Install the seals.
  12.  



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Fig. Fig. 39: Right exhaust bearing caps must be placed in their proper locations



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Fig. Fig. 40: Right exhaust camshaft bearing cap bolt tightening sequence



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Fig. Fig. 41: Use a torque wrench to tighten the cap bolts



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Fig. Fig. 42: Right intake bearing caps must be placed in their proper locations



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Fig. Fig. 43: Right intake camshaft bearing cap bolt tightening sequence



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Fig. Fig. 44: Left exhaust bearing caps must be placed in their proper locations



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Fig. Fig. 45: Left exhaust camshaft bearing cap bolt tightening sequence



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Fig. Fig. 46: Left intake camshaft bearing cap bolt tightening sequence



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Fig. Fig. 47: The camshaft seals are on the end of the component

  1. Install the No. 3 (rear) timing belt cover.
  2.  
  3. Install the camshaft timing gears.
  4.  
  5. Install the idler pulley, timing belt and covers.
  6.  
  7. Check and adjust the valve clearance.
  8.  
  9. Install the cylinder head (valve) covers.
  10.  
  11. Start the engine. Check the ignition timing.
  12.  
  13. Test drive the vehicle.
  14.  
  15. Check all fluid levels.
  16.  

INSPECTION



Checking Camshaft Runout

Camshaft runout should be checked when the camshaft has been removed from the engine. An accurate dial indicator is needed for this procedure; engine specialists and most machine shops have this equipment. If you have access to a dial indicator, or can take your camshaft to someone who does, measure the camshaft bearing journal runout. If the runout exceeds the limit replace the camshaft.

Checking Camshaft Lobe Height

Use a micrometer to check camshaft (lobe) height, making sure the anvil and the spindle of the micrometer are positioned directly on the heel and tip of the camshaft lobe as shown in the accompanying illustration.

Checking Bearing Oil Clearance
2S-ELC ENGINES ONLY

While the camshaft is still removed from the housing, the camshaft bearing journals should be measured with a micrometer. Compare the measurements with those listed in the Engine Mechanical Specifications chart in this section. If the measurements are less than the limits listed in the chart, the camshaft will require replacement, since the camshaft runs directly on the housing surface; no actual bearings or bushings are used, so no oversize bearings or bushings are available.

Using an inside dial gauge or inside micrometer, measure the inside diameter of the camshaft saddles (the camshaft mounts that are integrally cast as part of the housing. The inside diameter of the saddles is as follows:



No. 1-1.8307-1.8317 inch (46.500-46.525mm)
 
No. 2-1.8209-1.8218 inch (46.250-46.275mm)
 
No. 3-1.8110-1.8120 inch (46.000-46.025mm)
 
No. 4-1.8012-1.8022 inch (45.750-45.775mm)
 
No. 5-1.7913-1.7923 inch (45.500-45.525mm)
 
No. 6-1.7815-1.7825 inch (45.250-45.275mm)
 

The camshaft journal oil clearances are listed in the Engine Mechanical Specifications chart in this section. Simply subtract the journal diameter from the inside diameter. If clearances are off, the housing must be replaced (again, because oversize bearings or bushings are not available).

EXCEPT 2S-ELC

See Figure 48

Measure the bearing oil clearance by placing a piece of Plastigage® on each bearing journal. Replace the bearing caps and tighten the bolts to the proper torque.

Do not turn the camshaft.



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Fig. Fig. 48: Measuring the camshaft journal oil clearance

Remove the caps and measure each piece of Plastigage®. If the clearance is greater than the values on the Engine Mechanical Specifications chart, replace the camshaft. If necessary, replace the bearing caps and cylinder head as a set.

Check the camshaft bearings for flaking and scoring. If the bearings show any signs of damage, replace the bearing caps and the cylinder head as a set.

Checking Camshaft End-Play

After the camshaft has been installed, end-play should be checked. The camshaft sprocket should not be installed on the cam. Use a dial gauge to check the end-play, by moving the camshaft forward and backward in the cylinder head. End-play specifications should be as noted in the Engine Mechanical Specifications chart.

 
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