Chevrolet Informative - Lsx 454 crate motor blows up--- and has thin cylinder walls
Lsx 454, lsx454 crate motor- THIN CYLINDER WALLS
An important component of the engine block’s strength comes from having enough metal thickness to support a load. The industry standard and Chevrolet’s standard for cylinder wall thickness is a minimum of. 200 thousands of an inch. Chevrolet’s own advertising for the lsx block states “maximum 4.250 bore at. 200 minimum wall thickness”. My defective block had a smaller 4.185 bore, hence the remaining cylinder wall thickness should have been. 2325. However the sonic testing that was performed post-mortem discovered a bore thickness as little as. 177 which effectively cheated me of. 0555 thickness of metal or using a simple analogy in dollars, I was entitled to $232.50 but only received $177.00 dollars. A shortage of $55.50 or 24 percent!
Clearly this engine block was defective even by Chevrolets own standards. Below is the page directly from Chevrolet. As Proof, I circled in red where Chevrolet states cylinder wall thickness.