Remove the valve covers.
NOTEThe valve clearance must be measured with the camshaft at base circle. The engine will have to be rotated with the crankshaft pulley bolt to bring each valve to base circle.
- Use a feeler gauge to measure the clearance of each valve and record its location. A midrange clearance is the most desirable:
- If any of the valve clearances are out of specification, select new tappets using this formula: tappet thickness = measured clearance + the base tappet thickness - most desirable thickness.
- Select the tappets and mark the installation location.
- If required, install the new selected valve tappets in the marked locations.