Toyota Cressida and Van 1983-1990

Camshaft

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REMOVAL & INSTALLATION



5M-GE Engine
  1. Remove the cylinder head assembly as previously outlined in this section.
  2.  
  3. Remove the cylinder head covers.
  4.  
  5. Remove the No. 1 and No. 2 camshaft housing retaining nuts and remove the housings along with the camshafts.
  6.  
  7. Remove the camshaft housing rear covers by removing the retaining bolts.
  8.  
  9. Squirt clean oil down around the cam journals in the housing, to lubricate the lobes, oil seals and bearings as the cam is removed. Begin to pull the camshaft out of the back of the housing slowly, turning it as you pull. Remove the cam completely.
  10.  
  11. Replace the camshaft housing oil seal as follows:
  12.  
    1. If the camshaft is removed from the camshaft housing, use a suitable prytool and pry out the oil seal from the housing.
    2.  
    3. Install a new seal into the housing using a suitable seal driver tool. Apply a high temperature multi-purpose grease to the oil seal.
    4.  
    5. If the camshaft housing is installed on the cylinder head, using a suitable tool cut off the edge of the oil seal lips.
    6.  
    7. Use a suitable pry tool and pry out the oil seal from the housing. So as not to damage the camshaft, be sure to put some tape around the end of the prytool.
    8.  
    9. Install a new seal into the housing using a suitable seal driver tool. Apply a high temperature multi-purpose grease to the oil seal.
    10.  


To install:

  1. Lubricate the entire camshaft with clean oil. Insert the cam into the housing from the back, and slowly turn it as you push it into the housing. Install new O-rings and the housing end covers.
  2.  
  3. Install new camshaft housing gaskets over the dowel pins in the cylinder head. Position the camshaft housing including the camshafts over the dowels on the cylinder head.
  4.  
  5. Install and tighten the housing nuts and bolts gradually in 3 passes. Tighten the nuts and bolts to 16 ft. lbs. (22 Nm).
  6.  
  7. Install the cylinder head covers.
  8.  
  9. Install the cylinder head assembly as previously outlined in this section.
  10.  

7M-GE Engine


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Fig. Fig. 1 Apply multi-purpose grease on the new camshaft seals-7M-GE engine



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Fig. Fig. 2 Place the camshafts into the cylinder head correctly



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Fig. Fig. 3 Apply sealer to the No. 1 bearing cap-7M-GE engine



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Fig. Fig. 4 Place the bearing caps with their front marks pointing toward the front, and in numerical order-7M-GE engine



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Fig. Fig. 5 Uniformly tighten No. 3 and No. 7 bearing caps-7M-GE engine



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Fig. Fig. 6 Tighten the other bearing caps-7M-GE engine

  1. Remove the cylinder head assembly as previously outlined in this section.
  2.  
  3. Uniformly loosen and remove the bearing cap bolts in several passes.
  4.  
  5. Remove the camshaft bearing caps, oil seal and camshaft.
  6.  

To install:

  1. Apply a high temperature multi-purpose grease to the lip of the new oil seal. Install the seal onto the camshaft.
  2.  
  3. Apply engine oil to all the bearing journals.
  4.  
  5. Place the camshafts on the cylinder head. The exhaust camshaft has a distributor drive gear.
  6.  
  7. Apply a suitable sealer to the No. 1 bearing caps. Install the No. 1 bearing cap immediately after applying the sealant.
  8.  
  9. Place the bearing caps on each journal with the front marks pointing toward the front and in numerical order from the front side.
  10.  
  11. Temporarily install the bearing cap retaining bolts and tighten them in several passes.
  12.  
  13. Using a suitable seal driver, tap in the camshaft oil seal.
  14.  
  15. Uniformly tighten the No. 3 and No. 7 bearing cap bolts in several passes to obtain a final torque of 14 ft. lbs. (20 Nm).
  16.  
  17. Uniformly tighten the other bearing cap retaining bolts in several passes until a final torque of 14 ft. lbs. (20 Nm) is obtained.
  18.  
  19. Install the cylinder head assembly as previously outlined in this section.
  20.  

3Y-EC and 4Y-EC Engines


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Fig. Fig. 7 Install the thrust plate with the front facing as shown-3Y-EC and 4Y-EC engines

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the right front seat.
  4.  
  5. Remove the engine service hole cover.
  6.  
  7. Drain the coolant.
  8.  
  9. Disconnect the radiator inlet hoses, radiator breather hose, reservoir tank hose and remove the radiator assembly.
  10.  
  11. Remove the fan assembly along with the water pump as previously outlined.
  12.  
  13. Remove the distributor assembly as previously outlined.
  14.  
  15. Remove the cold start injector.
  16.  
  17. Remove the valve cover and gasket. Remove the rocker shaft assembly and pushrods. Be sure to keep them in their proper order.
  18.  
  19. Remove the 8 valve lifters with a magnet or suitable lifter removal tool.
  20.  
  21. Remove the crankshaft pulley bolt and using a suitable pulley puller, remove the crankshaft pulley.
  22.  
  23. Remove the timing chain cover retaining bolts and pry off the timing chain cover.
  24.  
  25. Remove the 2 timing chain tensioner bolts and remove the chain tensioner.
  26.  
  27. Using a suitable camshaft gear holding tool, remove the camshaft sprocket bolt.
  28.  
  29. Using a suitable puller, uniformly remove the camshaft sprocket together with the crankshaft sprocket and chain.
  30.  
  31. Remove the vibration damper retaining bolts and remove the damper.
  32.  
  33. Remove the camshaft thrust plate retaining bolts and remove the thrust plate.
  34.  
  35. Squirt clean oil down around the cam journals in the housing, to lubricate the lobes, oil seals and bearings as the cam is removed. Begin to pull the camshaft out of the cylinder head slowly, turning it as you pull. Remove the cam completely.
  36.  

To install:

  1. Lubricate the entire camshaft with clean oil. Insert the cam into the engine block and slowly turn it as you push it into the block. Install the thrust plate with the 2 retaining bolts and torque them to 13 ft. lbs. (18 Nm).
  2.  
  3. Install the vibration damper and retaining bolts. Tighten the bolts to 13 ft. lbs. (18 Nm).
  4.  
  5. Set the key of the crankshaft sprocket facing upward.
  6.  
  7. Align the set key of the camshaft sprocket with the mark on the thrust plate.
  8.  
  9. Install the sprocket onto the timing chain. Align the timing marks of the timing chain and sprocket.
  10.  
  11. Uniformly install the chain together with the sprockets.
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  13. Apply a light coat of engine oil on the threads and under the bolt head of the camshaft sprocket bolt. Using a suitable camshaft gear holding tool, install the camshaft sprocket bolt. Torque it to 67 ft. lbs. (90 Nm).
  14.  
  15. Install the chain tension with the 2 bolts and tighten the bolts to 13 ft. lbs. (18 Nm).
  16.  
  17. Install a new timing chain cover gasket and install the chain cover and bolts. Tighten the bolts to 52 inch lbs. (6 Nm).
  18.  
  19. Using a plastic-faced hammer, tap in the crankshaft pulley. Apply a light coat of engine oil on the threads and under the bolt head of the pulley bolt. Install the bolt and tighten the bolt to specifications.
  20.  
  21. Install the valve lifters (be sure to soak them in oil and pump them up pressing down on the lifter plunger while the lifter is submerged in oil).
  22.  
  23. Install the pushrods in their proper order and install the rocker arm shaft assembly. Install the valve cover with a new gasket.
  24.  
  25. Install the cold start injector.
  26.  
  27. Install the distributor assembly as previously outlined.
  28.  
  29. Install the fan assembly along with the water pump as previously outlined.
  30.  
  31. Install the radiator assembly and reconnect the radiator inlet hoses, radiator breather hose and reservoir tank hose.
  32.  
  33. Refill the coolant system.
  34.  
  35. Reconnect the negative battery cable. Connect a timing light and tachometer.
  36.  
  37. Start the engine and set the ignition timing. If the engine is hard to start, have some one turn the distributor left and right very slowly until the engine starts. Once this has happened, use your timing light to readjust the timing properly. Recheck the idle speed adjustment. Check for leaks and add coolant as necessary.
  38.  
  39. Install the engine service hole cover and install the right seat.
  40.  

CAMSHAFT INSPECTION



Prior to removal of the camshaft, measure the end-play with a feeler gauge. Refer to the Specifications Chart, if the end-play is beyond specs, it may be necessary to replace the cylinder head or camshaft.

Measure the bearing oil clearance by placing a piece of Plastigage® on each bearing journal. Replace the bearing caps and tighten the bolts to 13-16 ft. lbs.

Do not turn the camshaft.

Remove the caps and measure each piece of Plastigage®. If the clearance is greater than the values on the Specifications Chart, replace the bearings, head or cam, depending on which engine you are working on.

Place the camshaft in V-block supports and measure its run-out at the center bearing journal with a dial indicator. If the run-out exceeds specs, replace the cam.

Use a micrometer and measure the bearing journals and the cam lobe heights. If the bearing journals are not within specs, or the lobes differ greatly in size from wear, replace the camshaft.

 
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