Yukon 2WD V8-5.7L VIN R (1997)
Lifter / Lash Adjuster: Service and Repair
Replacement
REMOVAL
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Tools Required
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J 9290-01 Valve Lifter Remover (Slide Hammer Type), or equivalent.
1. Remove the intake manifold.
2. Remove the pushrods.
3. Remove the valve lifter retainer and guides.
4. Remove the valve lifters. Remove the valve lifters one at a time and place them in an organizer rack. The valve lifter must be installed in the same
bore from which the valve lifters were removed. A stuck valve lifter can be removed using the J 9290-01.
5. Inspect the valve lifter body for scuffing and scoring. If the valve lifter body wall is worn or damaged, the mating bore in the block should also be
checked.
a. Check the fit of each valve lifter in its mating bore in the block. If the clearance is excessive, try a new valve lifter.
b. Check the roller for freedom of movement. The valve lifter must be smooth and even. If worn, pitted, or damaged, the mating camshaft lobe
should also be checked.
INSTALLATION
NOTE:
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When new valve lifters or a new camshaft is installed, change the engine oil and the oil filter.
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Engine Oil Supplement GM P/N 1051396 or the equivalent should be added to the engine oil.
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Replace all valve lifters when a new camshaft is installed.
1. Install the valve lifters into the block. Lubricate the valve lifters with High Viscosity Oil with Zinc GM P/N 1052367 or the equivalent.
2. Install the valve lifter retainer and guides.
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Tighten the bolts to 25 Nm (18 ft. lbs.).
3. Install the intake manifold.