Chevrolet Citation/Omega/Phoenix/Skylark 1980-1985 Repair Guide

Camshaft Bearings

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REMOVAL & INSTALLATION





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Fig. Fig. 1 Typical camshaft bearing removal tool

Four Cylinder
  1. Remove the engine from the vehicle as previously outlined.
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  3. Remove the camshaft from the engine as previously outlined.
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  5. Unbolt and remove the engine flywheel.
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  7. Drive the rear camshaft expansion plug out of the engine block from the inside.
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  9. Using a camshaft bearing service tool, drive the front camshaft bearing towards the rear and the rear bearing towards the front.
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  11. Install the appropriate extension on the service tool and drive the center bearing out towards the rear.
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  13. Drive all of the new bearings into place in the opposite direction of which they were removed, making sure to align the oil holes of each bearing with each of the feed holes in the engine block bores.
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The front camshaft bearing must be driven approximately 1 / 8 in. behind the front of the cylinder block to uncover the oil hole to the timing gear oiling nozzle.

8. Install the camshaft into the engine, then reinstall the engine as previously outlined.

Six Cylinder

Camshaft bearings can be replaced with engine completely or partially disassembled. To replace bearings without complete disassembly, remove the camshaft and crankshaft, leaving cylinder heads attached and pistons in place. Before removing crankshaft, tape threads of connecting rod bolts to prevent damage to crankshaft. Fasten connecting rods against sides of engine so they will not be in the way while replacing camshaft bearings.

  1. Remove the camshaft rear cover.
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  3. Using Tool J-6098 or its equivalent, with nut and thrust washer installed to end of threads, index pilot in camshaft front bearing and install puller screw through pilot.
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  5. Install remover and installer tool with shoulder toward bearing, making sure a sufficient amount of threads are engaged.
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  7. Using two wrenches, hold puller screw while turning nut. When bearing has been pulled from bore, remove remover and installer tool and bearing from puller screw.
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  9. Remove remaining bearings (except front and rear) in the same manner. It will be necessary to index pilot in camshaft rear bearing to remove the rear intermediate bearing.
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  11. Assemble remover and installer tool on driver handle and remove camshaft front and rear bearings by driving towards center of cylinder block.
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To install:

The camshaft front and rear bearings should be installed first. These bearings will act as guides for the pilot and center the remaining bearings being pulled into place.

  1. Assemble remover and installer tool on driver handle and install camshaft front and rear bearings by driving towards center of cylinder block.
  2.  
  3. Using Tool Set J-6098 or its equivalent, with nut then thrust washer installed to end of threads, index pilot in camshaft front bearing and install puller screw through pilot.
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  5. Index camshaft bearing in bore (with oil hole aligned as outlined below), then install remover and installer tool on puller screw with shoulder toward bearing.

    The rear and intermediate bearing oil holes must be aligned at 2:30 o'clock.
     
    The front bearing oil holes must be aligned at 1:00 and 2:30 o'clock (two holes).
     

  6.  
  7. Using two wrenches, hold puller screw while turning nut. After bearing has been pulled into bore, remove the remover and installer tool from puller screw and check alignment of oil hole in camshaft bearing.
  8.  
  9. Install remaining bearings in the same manner. It will be necessary to index pilot in the camshaft rear bearing to install the rear intermediate bearing. Clean the rear cover mating surfaces and bolt holes, then apply 2 1 / 8 " bead of R.T.V. to the cover. Install the cover.
  10.  

 
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