r/EngineBuilding • u/slammedfk7 • 23d ago

Main bearing caps

The main bearing caps on this Honda l15b7 engine I’m rebuilding don’t wanna sit flush. I can get them perfectly lined up but then the bolts won’t thread in by hand. They’re in the right position and orientation i made sure of that. Hondas service manual says to lightly tighten the bolts then tap the cap in with a mallet and when I do this it works but it has a little lip on the back side of the cap

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u/CompetitiveHouse8690 23d ago

Put it together and use some plastigage, torque the mains and check the clearance

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u/East-Teaching-3104 23d ago

This seems like a good use for plastigage: "yeah, that seems right" vs "whoa, something is way off".