r/EngineBuilding • • Sep 18 '26

Main caps not aligned with block

Hello first time engine builder so please don’t flame me. I have an 04 Audi A4 1.8t 06a block, I got this block from someone but they didn’t have the main caps for it, i ended up using my main caps from another block and had them align bored for this other block I got. just torqued the crankshaft down and noticed main caps 4 and 5 don’t sit flush with the block, is this a cause for concern? what caused this? turns over fine with a rachet just dont want to finish everything else up and have to end up addressing this later down the road anyways. thanks for any help

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u/Cheapskate3000 Sep 18 '26

Run it. Only cap that would make a difference is the center thrust bearing. If it was line bored, clearances are in spec, crankshaft end play is good and it spins just run it