Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
KHLOW2008
AUTOMOTIVE REPAIR CONTRIBUTOR
41,814 POSTS
The valve lifters are hydraulic and non adjustable. It could be due to oil, worn lifters or the lifters needs servicing/replacement. If engine is heavily sludged, replacing the lifters might have the problem recurring unless engine is desludged.