Quote:
Originally Posted by IMR-Merlin
Well boys, the problem was found. The "mechanic" never tightened down the cam sprocket on the right bank, so the nut backed off, the pin popped out and all the valves on that side crashed.
We are leaning toward not splitting the cases. The car has a total of 90k on it and this is a second engine (Porsche warranteed the original).
All the bores look clean with a a good cross hatch pattern and no visible pitting. i will be borrowing bore gauges this week to check for ovaling.
I will be in need of 6 rockers, 3 intake and 3 exhaust valves. What do you think the chances are that the valve guides will be ok after crashing the valves?
Oh and good to meet some of you yesterday.
Brendon
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There is a spec for measuring allowable wear. You lift the valve off the seat a certain amount and see how far it can wiggle. I don't know if that would apply to this situation. Being the conservative guy I am, I would send the heads to Anchor Atlantic and let him go through them. He will also catch the tired exhaust valve springs that the previous engine builder reused, etc.
He's very reasonable, especially as Porsche things go.