valve clearence

2002 NISSAN FRONTIER
19,900 MILES • 2.3L • 4 CYL • 2WD • AUTOMATIC
Avatar
BONESMIKE
  • MEMBER
  • 21 POSTS
I have the truck listed above dual overhead cams. had a new head with new bolts and chin 4 months later the pin sheared causing the chain not to turn. did this hit the valves since the timing chain failed or is there a tolerance where it will not hit the valves?
Jan 16, 2021 at 12:22 AM
Advertisement
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good morning,

This has resulted in valve damage and possible piston damage. When the valve timing is off, there is no clearance for the piston and valves.

https://www.2carpros.com/articles/how-a-timing-belt-works

I would be very concerned as to why the pin broke. That tells me the cam locked up. That only happens when there is a lack of oil to the head.

https://www.2carpros.com/articles/high-or-low-engine-oil-pressure

Roy
Jan 16, 2021 at 9:21 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
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.