REMOVAL & INSTALLATION
Valve lifters and pushrods should be kept in order so they can be reinstalled in their original position. Some engines will have both standard size 0.010" oversize valve lifters as original equipment. The oversize lifters are etched with an O on their sides; the cylinder block will also be marked with an O if the oversize lifter is used.
- Remove the intake manifold and gasket, except on inline 6-cylinder engines. Instead, remove the lifter cover on the side of the engine.
- Remove the valve covers.
- Remove the rocker arm assemblies and pushrods.
- If the lifters are coated with varnish, apply carburetor cleaning solvent to the lifter body. The solvent should dissolve the varnish in about 10 minutes.
- Remove the lifters. A special tool for removing lifters is available, and is helpful for this procedure.
- New lifters must be primed before installation, as dry lifters will seize when the engine is started. On gasoline engine lifters, submerge the lifters in SAE 10 oil, which is very thin. Carefully insert the end of a 1 / 8 in. (3mm) drift into the lifter and push down on the plunger. Hold the plunger down while the lifter is still submerged; do not pump the plunger. Release the plunger. The lifter is now primed.
- Coat the bottoms of the gasoline engine lifters, with Molykote® or an equivalent molybdenum-disulfide lubricate before installation. Install the lifters and pushrods into the engine in their original order.
- Install the intake manifold gaskets and manifold, except on inline 6-cylinder engines. Instead, install the lifter cover using a new gasket.
- Position the rocker arms, pivots and bolts on the cylinder head.
An additive containing EP lube, such as EOS, should always be added to crankcase oil for break-in when new lifters or a new camshaft is installed. This additive is generally available in automotive parts stores.