Cam Timing

Author
Discussion

HotRodderBob

Original Poster:

3 posts

87 months

Friday 24th February 2017
quotequote all
Help!

I have a problem with my engine after doing the cam timing! I had to use a DTI to get the timing right as the timing marks have gone.

Ive started it up, which it did quite easily but theres a noisy top end. Its not valve clearances (checked) or oil starvation, so I'm wondering whether my valves are touching pistons.

Its an interference engine with piston cut outs.

The timings are 107.5 exhaust, and 115 inlet.

How far out would cam timing have to be on a DOHC engine for this to happen? Is the engine knackered with any kind of piston valve contact?