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Subaru ff-1/1300/1400/1600/1800/Brat 1970-1984 Repair Guide

Camshaft and Bearings

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REMOVAL & INSTALLATION



The camshaft turns on journals that are machined directly into the crankcase.

  1. Refer to the engine removal and Installation procedures in this section and remove the engine from the vehicle, then separate the transaxle from the engine.
  2.  



Click image to see an enlarged view

Fig. Fig. 1 The camshaft is stamped by identification marks

  1. Remove the clutch assembly/flywheel (MT) or the torque converter drive plate (AT).
  2.  
  3. Remove the flywheel housing-to-engine bolts and the housing from the engine.
  4.  
  5. Remove the crankshaft gear from the crankshaft.
  6.  
  7. Straighten the lockwashers and remove the camshaft thrust plate-to-engine bolts.
  8.  


WARNING
The lockwashers are straightened and the bolts removed through the access holes in the camshaft gear.

  1. Remove the rocker arm-to-cylinder head covers, the rocker arm-to-cylinder head assemblies, the pushrods and valve lifters.
  2.  


WARNING
When removing the pushrods and valve lifters, be sure to keep the items in order for reassembly purposes.

  1. Pull the camshaft toward the rear of the engine and remove it from the engine; be careful not to damage the bearing journals and/or the camshaft lobes.
  2.  


WARNING
Remove the oil seal; be sure to replace it with a new one when reassembling the engine.

  1. Inspect the camshaft.
  2.  

To install:

  1. Using a putty knife, clean the gasket mounting surfaces.
  2.  
  3. Install the camshaft and tighten the thrust plate bolts. Using a feeler gauge or a dial indicator, move the camshaft (fore and aft), then measure the end-play, it should be 0.008 in. (0.2032mm) or less.
  4.  
  5. To complete the installation, use new gaskets and sealant where necessary. Assemble the engine and reverse the removal procedures. Refill the cooling system and the crankcase. Start the engine, allow it to reach normal operating temperatures and check for leaks.
  6.  

INSPECTION



  1. Put the camshaft in V-blocks and have a dial indicator contact the inside face of the cam gear. If run-out exceeds 0.0098 in. (0.24892mm), replace the gear.
  2.  
  3. Using a dial micrometer and a set of V- blocks, measure the camshaft bearing wear and the camshaft bend; the bend limit is 0.002 in. (0.0508mm)
  4.  
  5. Measure the cam gear-to-crankshaft backlash. Mount a dial indicator with its stem resting on a tooth of the camshaft gear. Rotate the gear until all slack is removed, and zero the indicator. Rotate the gear in the opposite direction until slack is removed, and record gear backlash. Mount the indicator with its stem resting on the edge of the camshaft gear, parallel to the axis of the camshaft. Zero the indicator., and turn the camshaft gear one full turn, recording the runout. If either backlash or runout exceeds specifications, replace the worn gear(s).
  6.  

 
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