Diesel exhausts do cause cancer, says WHO

[MadBlaster]

Originally Posted by ATAG_Bliss

No. There's no point. It's just a matter of weak seat pressure and high rpm's that wouldn't allow the valves to close fast enough to clear the oncoming compression/exhaust stroke.

The good thing about that engine is the valve seat is parallel to the piston. So the only thing that happens when the piston hits it is it slammed back into the seat/guide.

Any other engine and all there would've been a catastrophe.

sure. non interference engine they call it. thought I would point it out just in case changing springs wasn't enough. changing the cam profile to steeper slope will shorten the time the valve is held open. if you end up needing a valve job, well you'll know soon enough. good luck.