CHECKING BASE SETTING
See Figure 1
Hydraulic valve lifters are used with overhead cams on 1976 and later V8 engines. The rocker arm is always in contact with the cam, reducing noise and eliminating operating clearance.
A dial indicator with an extension and a measuring thrust piece (MBNA #100 589 16 63 00, 0.187 in. thick are necessary to perform this adjustment.
1976-84 V8 Engines
See Figures 2 and 3
The base setting is the clearance between the upper edge of the cylindrical part of the plunger and the lower edge of the retaining cap (dimension A) when the cam lobe is vertical.
- Turn the cam lobe to a vertical position.
- Attach a dial indicator and tip extension and insert the extension through the bore in the rocker arm onto the head plunger. Preload the dial indicator by 2 mm and zero the instrument.
- Depress the valve with a valve spring compressor. The lift on the dial indicator should be 0.028-0.075 inch.
- If the lift is excessive, the base setting can be changed by installing a new thrust piece.
- Remove the dial indicator.
- Remove the rock