Cylinder wall pitting question - Team Camaro Tech
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post #1 of 3 (permalink) Old Aug 13th, 08, 11:26 AM Thread Starter
Join Date: Dec 2005
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Cylinder wall pitting question


I recently purchase a short block 383 engine and while degreeing the cam I noticed the #5 cylinder wall has a few pits and two fairly large craters that didn't clean up when it was machined .030 over. I attached two pictures of the area.In the largest crater I was able to pick out rust particles with a small probe. I am concerned the crater depth is too close to the water jacket? I don't know how thick is the wall is in that area? Before I continue with assembly I would like to know if it is OK for me to continue. I am concerned it might have a coolant leak or that the rings will not seal in the piston. I am waiting a reply from the machine shop but I would like to be informed before hand.
Thanks in advance.
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post #2 of 3 (permalink) Old Aug 13th, 08, 12:24 PM
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Re: Cylinder wall pitting question

The pits are likely caused by bubbles or voids in original casting that get exposed when bored. I wouldn't worry too much about water jacket thickness. But I would not use this block. The pits will cause excess wear on rings, collect carbon, create hotspots. Start over with better block.
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post #3 of 3 (permalink) Old Aug 13th, 08, 02:00 PM
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Re: Cylinder wall pitting question

Ditto on ring damage. You could have the block sonic tested and see how thick the walls are. If they are thick enough you could go like 040 or 060 over which might fix the pitting or reveal even more.

Probably since it is a small block it would be cheaper to find another block.


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