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Interesting - Concept. I've been through one teardown since going with my 4 bolt splayed caps and haven't visually seen any problems? Actually used the main bearings over again. Then again, I'm not running a rubber crankshaft.



Just to be clear, I'm not saying the 4-bolt caps don't work, or aren't an improvement. I'm just saying that they are doing a different thing then the girdle does.

The 4-bolt cap certainly does a good job keeping the cap clamped to the block which is a good thing. It also helps distribute the load across a wider section of the bulkhead which is also good. In a way it helps tie more of the main bulkhead back to the pan rail through mechanical fastening.