Valve Train Analysis - Engine Running, Valve Tappet
WARNING: This page is about a different car, the 2005 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Valve tappet noise can be caused by any of the following:
- Excessive valve tappet gap (collapsed)
- Incorrectly functioning valve tappet
- Air in lubrication system
- Excessive valve guide wear
- Low oil pressure
Excessive collapsed valve tappet gap can be caused by loose rocker arm seat bolts or nuts, incorrect initial adjustment or wear of the valve tappet face, or worn roller valve tappet, push rod, rocker arm, rocker arm seat or valve tip. With the valve tappet collapsed, check the gap between the valve tip and the rocker arm to determine if any other valve train parts are damaged, worn or out of adjustment.