a. Lifter Bodies Immediately following the removal of lifters from a job, they should be visually inspected for an excessively worn foot condition. Figure 15 illustrates five different conditions which will be encountered. Those lifters which are soft, spalled or have straight line wear in the lifter foot, which is rough or scored, should be [...]

1951 Buick Recommended Bench Layout a. Solvents The type of solvent required for 1951 Buick Hydraulic Valve Lifters cleaning should be of a varnish removing nature. For ease of operation it should either dissolve the varnish accumulation on lifter parts or soften it within an hour so that it may be removed by [...]

If only one or two lifters are found to be noisy on a job and there is no reason to suspect a varnish or dirt condition, it is recommended that these noisy lifters be removed without removing the rocker arm assembly, in the following manner: Remove air cleaner if necessary. Remove rocker arm cover. Remove [...]

Before removing the side cover to remove any noisy lifters, run the engine with the rocker arm cover off and listen to each valve train combination approximately 1/2'' from the pad on the rocker arm using a piece of heater hose to transmit the sound. See Figure 6. 1951 Buick Locating Noisy Lifter [...]

Because the fit of the plunger to the body is so close to provide an effective leakdown rate, it is very important that dirt, foreign particles and varnish be prevented from entering the lifter and that a continuous flow of oil is supplied to the lifter as explained in Section 10. In order to accomplish [...]

a. 1951 Buick Hydraulic Valve Lifters Function In addition to its normal function of a cam follower, each hydraulic valve lifter also serves as an automatic adjuster which maintains zero lash in the valve operating linkage under all operating conditions. By eliminating all lash in the operating linkage and also providing a cushion of oil [...]