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Old 09-05-2016, 06:06 AM   #12
Bassman/NZ
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Join Date: May 2010
Location: Napier, New Zealand
Posts: 2,001
Default Re: "Squish" problems

When I first did mine, I used the tinfoil trick. When I fired the engine up I had a noise, so shut it down and pulled the heads. I discovered the milling had altered the relationship of the piston dome to squish area, and I could see the marks where the pistons had kissed the heads. I laid the gaskets on the heads and marked the outline on the heads with a fine sharpie, then very carefully smoothed the squish area out to the sharpie marks, taking care not to take any material from the centre of the squish area. I used flap wheels to do this as they don't remove too much at a time. After a couple of refits and tweaks, I got them to where I had fairly consistant 0.045". Works fine now. I have 160-165lbs across all 8 cylinders. Can't help with the leak, sorry. I like the Best copper gaskets with a smear of grease both sides. The graphtite ones are a pain in the bum to remove.
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