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Willie Makeit · 03-22-2024, 09:35 AM

it looks like someone installed a head bolt with water or oil in the hole. the bolt pushing down on the water/oil caused a hydraulic pressure spike and cracked the block.

03-22-2024, 09:35 AM	#4
Willie Makeit Registered User Join Date: Oct 2013 Location: Alabama Posts: 1,206	Re: Hairline Crack in LM7 5.3 Block it looks like someone installed a head bolt with water or oil in the hole. the bolt pushing down on the water/oil caused a hydraulic pressure spike and cracked the block.