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| One independent repair garage did some comparisons between an older (reliable) GM 6.2 and the newer (problem) 6.2 and found that (in his study) the oil hole in the crankshaft rod journal had been chamfered excessively, making it too close to the edge of the bearing shells and oil was being squirted out excessively when under load. You didn't need a micrometer to see this. It was obvious and a bad idea by whomever was making the crankshaft itself, who was a vendor for GM, according to him. So, if you had 2 or more crankshaft vendors, trying to figure out what's going on would have complicated the diagnosis.
Edited by DrAllis 12/6/2025 07:38
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Gmc 6.2l engine
