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[Kevin Wood]

The tiniest things can kill an engine once there's contact with moving parts.

When we went over to Cape Town on our honeymoon last year I smuggled a set of 16 nice shiny new valves over for a mate's racing car. He rebuilt the engine with all trick parts, forged pistons, the lot. It did about 5 laps before it let go. A piston cooling oil jet had been fouling ever so slightly with the skirt of one of the pistons. It eventually broke off, bounced around inside the engine trashing things in the bottom end. Meanwhile one of the main bearings was starved of oil and siezed, threw a rod through the side of the block and 14 of the valves were totally shot, along with the rest of the engine.  

Kevin

[JamesV6CDX]

Out of interest, how did sassanach get away with a belt slip of 6 teeth, and survive?

It only appeared to be my inlet cam that had slipped by that amount.. I can't really picture in my head what happened in there..

I still feel I might be lucky...

[Marks DTM Calib]

Possibly exhaust only slipped.....if the inlet moves by that much its advanced so starts to open before the piston is at TDC and by the time it is there touching....

[JamesV6CDX]

So how did Sassanach get away with six teeth? don't forget, four teeth was only a visual estimate - it may have been three.

I don't know why, I'm still quietly confident it will be ok

Remember I said I tried to turn the crank after it spluttered and died, and it wouldn't go around??

Well, the fact that it was in gear wasn't helping  

[Marks DTM Calib]

So how did Sassanach get away with six teeth? don't forget, four teeth was only a visual estimate - it may have been three.

I don't know why, I'm still quietly confident it will be ok

Remember I said I tried to turn the crank after it spluttered and died, and it wouldn't go around??

Well, the fact that it was in gear wasn't helping  

Makes no odds....you can still turn the engine over on a car with a knackered cambelt.....the pistons will have already re-created the piston valve clearances by bendng them.

The bottom line is it wouldn't run, even if it was a few teeth out on all the cams, it would stll run (not well).....

[JamesV6CDX]

left hand bank pulleys one tooth out, r.h bank 6 TEETH OUT and yet it ran bl++dy awfull noise tho.anyway after checking with a modified spark plug and a airline NO valve damage at all. 8-)

how about this? 6 teeth!!!

[Marks DTM Calib]

left hand bank pulleys one tooth out, r.h bank 6 TEETH OUT [size=16]and yet it ran [/size]bl++dy awfull noise tho.anyway after checking with a modified spark plug and a airline NO valve damage at all. 8-)

how about this? 6 teeth!!!

Nuff said....