OHC valve diagram and description of head rail

1993 NISSAN PATHFINDER

100,000 MILES • 3.0L • V6 • 4WD • AUTOMATIC

ROBERT ERWIN

MEMBER
18 POSTS

I am not sure how the oh valve system works. Are there four valves per cylinder operated by two separate cam shafts? Have suspected bent valves do to bad timing belt. Please answer.

Oct 26, 2018 at 1:36 PM

ASEMASTER6371

✓ASE Certified Mechanic
52,796 POSTS

Good afternoon.

If you feel you have bent valves from a failed timing belt, I would perform a compression test to verify.

Remove all the spark plugs and check the compression in each cylinder. They should be around 130-140.

Roy

https://www.2carpros.com/articles/how-to-test-engine-compression

Oct 26, 2018 at 2:10 PM

ROBERT ERWIN

MEMBER
18 POSTS

can you sent me a diagram of the valve system on a 3.0 1993 pathfinder

Oct 28, 2018 at 7:28 PM

ASEMASTER6371

✓ASE Certified Mechanic
52,796 POSTS

I attached some pictures for you.

Roy

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
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Oct 28, 2018 at 7:46 PM