This was on a 350 Chevy in a boat. I had done a hone, ring, and bearing job, sent the heads off and had them worked.
Put it all together, took it for a test run, all seemed good, ran good. Told the customer to take it easy the first few hours.
I suspect his idea of break in though, was to run it wide open, see if he could blow it up under warranty, just struck me as that type person.
Well, the next Monday, there it was, no compression on one cylinder...
I pulled the head, the intake valve was rusty red, like it had been glowing hot. The center was pulled in to a cone shape, and about a 1/32" gap all the way around. Didn't appear to be any damage to the piston, no evidence anything had hit the piston or valve. Took the head back to the shop that did them, they replaced the valve, cleaned up the seat. Said they had never seen that happen either.
Put it back together, guess it worked, no more complaints.
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Today's Featured Article - Recollections of a John Deere GP - by Charlie Cook. I grew up on my dad's 280 acre general farm in Western Michigan. Dad's only tractor when I was very young was the old GP. My first recollection of this tractor was when dad allowed my brother and myself to ride on the tractor with him driving. One of us would sit on the left fender (away from the clutch) and other would sit on the gas tank and hold onto the crankcase breather pipe.
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