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OHC valve diagram and description of head rail

Tiny
ROBERT ERWIN
  • MEMBER
  • 1993 NISSAN PATHFINDER
  • 3.0L
  • V6
  • 4WD
  • AUTOMATIC
  • 100,000 MILES
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.
Friday, October 26th, 2018 AT 1:36 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 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
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Friday, October 26th, 2018 AT 2:10 PM
Tiny
ROBERT ERWIN
  • MEMBER
  • 18 POSTS
Can you sent me a diagram of the valve system on a 3.0 1993 pathfinder
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Sunday, October 28th, 2018 AT 7:28 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
I attached some pictures for you.

Roy
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Sunday, October 28th, 2018 AT 7:46 PM

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