Toyota Celica 1986-1993 Repair Guide

Crankshaft and Main Bearings

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REMOVAL & INSTALLATION



  1. Remove the connecting rod caps, following the procedure in this Section.
  2.  
  3. Check the crankshaft thrust clearance (end play) before removing the crank from the block. Using a pry bar, pry the crankshaft the extent of its travel forward and backward, and measure the clearance of the thrust washers with a dial indicator. If clearance is greater than that specified, the thrust washers or crankshaft must be replaced (see main bearing installation, below).
  4.  
  5. Using a punch, mark the corresponding main bearing caps and saddles according to position: one punch on the front main cap and saddle, two on the second, three on the third, etc. This ensures correct reassembly.
  6.  
  7. Remove the main bearing caps after they have been marked.
  8.  
  9. Remove the crankshaft form the block. On the 3S-GTE engine, remove the oil nozzles with the relief valves.
  10.  
  11. Follow the crankshaft inspection, main bearing clearance checking and replacement procedures below before reinstalling the crankshaft.
  12.  

To install:

  1. Thoroughly clean the saddles, bearing caps, and crankshaft. Make sure the crankshaft has been fully checked and is ready for reassembly.
  2.  



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Fig. Fig. 1 Cylinder block components2S-E engine shown



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Fig. Fig. 2 Cylinder block components3S-FE and 3S-FE engines shown



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Fig. Fig. 3 Cylinder block components3S-GTE engine shown



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Fig. Fig. 4 Cylinder block components4A-FE engine shown

  1. On the 3S-GTE engine, install the oil nozzles, torquing the bolts to 81 inch lbs. (9.1 Nm). Place the upper main bearings in the block saddles so that the oil grooves and/or oil holes are correctly aligned with their corresponding grooves or holes in the saddles.
  2.  



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Fig. Fig. 5 Cylinder block components5S-FE engine shown



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Fig. Fig. 6 Measuring the crankshaft thrust clearanceCelica



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Fig. Fig. 7 Removing the main bearing capsCelica

  1. Install the thrust washers on the center main bearing, with the oil grooves facing out.
  2.  
  3. Lubricate the faces of all bearings with clean engine oil, and place the crankshaft in the block.
  4.  
  5. Install the main bearing caps in numbered order with the arrows or any other orientation marks facing forward. Torque the bolts in sequence in two or three passes to the specified torque. Rotate the crankshaft after each pass to ensure even tightness.
  6.  



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Fig. Fig. 8 Installing the oil nozzles3S-GTE engine



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Fig. Fig. 9 Installing the main bearing capsCelica



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Fig. Fig. 1 0Main bearing cap bolt torque sequenceCelica

CLEANING AND INSPECTION



Main Bearing Clearance Check

Checking main bearing clearances is done in the same manner as checking connecting rod big-end clearances.

  1. With the crankshaft installed, remove the main bearing cap. Clean all oil form the bearing insert in the cap and from the crankshaft journal, as the Plastigage® material is oil-soluble.
  2.  
  3. Lay a strip of Plastigage® along the full width of the bearing cap (or along the width of the crank journal if the engine is out of the car and inverted).
  4.  
  5. Install the bearing cap and torque to specification.
  6.  


WARNING
Do NOT rotate the crankshaft with the Plastigage® installed.

  1. Remove the bearing cap and determine bearing clearance by comparing the width of the now-flattened Plastigage® with the scale on the Plastigage® envelope.
  2.  
  3. Repeat the above for the remaining bearings.
  4.  
  5. Compare the readings with those in the Engine Rebuilding Specification Chart. If the oil clearance is greater than maximum, replace the bearings. If necessary, grind or replace the crankshaft.
  6.  


WARNING
If using a standard bearing, replace it with one having the same number. If the number of the bearing cannot be determined, select the correct bearing by adding together the numbers imprinted on the cylinder block and crankshaft, then selecting the bearing with the same number as the total. There are 5 sizes of standard bearings, marked 1, 2, 3, 4 and 5 accordingly. For example, cylinder block number 2, plus crankshaft number 1, equals bearing number 3.



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Fig. Fig. 1 1Standard size identification markings on block, crankshaft and main bearingsCelica



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Fig. Fig. 1 2Add the number of block and crankshaft to select main bearing, if main bearing is unidentifiedCelica

Crankshaft Journal Check
  1. Place the crankshaft on V-blocks.
  2.  
  3. Using a dial indicator, measure the circle runout of the center journal.
  4.  
  5. If the circle runout is greater than maximum (See Engine Rebuilding Specification Chart), replace the crankshaft.
  6.  
  7. Using a micrometer, measure the diameter of each main journal.
  8.  
  9. If the diameter is not as specified, check the oil clearance and grind or replace the crankshaft, if necessary.
  10.  
  11. Check the crankshaft for taper and out-of-round. If not within specifications (See Engine Rebuilding Specification Chart), grind or replace the crankshaft.
  12.  



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Fig. Fig. 1 3Checking crankshaft for runoutCelica



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Fig. Fig. 1 4Checking crankshaft journal diameter, taper and out-of-roundCelica

BEARING REPLACEMENT



The main bearings must be replaced if the crankshaft has been reground.

  1. Remove the crankshaft from the engine block, using the proper procedures.
  2.  
  3. Remove the main bearing inserts from the bearing caps and from the main bearing saddles. Remove the thrust washers, if equipped.
  4.  
  5. Thoroughly clean the saddles, bearing caps, and crankshaft.
  6.  

To Install:

  1. Make sure the crankshaft has been fully checked and is ready for reassembly. Place the upper main bearings in the block saddles so that the oil grooves and/or oil holes are correctly aligned with their corresponding grooves or holes in the block saddles.
  2.  


WARNING
The lower bearings have no oil holes. Make sure the proper width bearings are placed in the proper positions on the 3S-GTE engine.

  1. Install the thrust washers on the center main bearing, with the oil grooves facing out.
  2.  
  3. Lubricate the faces of all bearings with clean engine oil, and place the crankshaft in the block.
  4.  
  5. Install the main bearing caps in numbered order with the arrows or any other orientation marks facing forward. Torque the bolts in sequence in two or three passes to the specified torque. Rotate the crankshaft after each pass to ensure even tightness.
  6.  



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Fig. Fig. 1 5Main bearings and main bearing capsCelica



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Fig. Fig. 1 6Main bearings. Make note of different widths3S-GTE engine



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Fig. Fig. 1 7Aligning bearing claw with claw groove of blockCelica



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Fig. Fig. 1 8Installing upper thrust washers on No. 3 journal. Grooves face outward.Celica

 
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