Thread: I broke a main cap. Please advise

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Originally Posted by jerry clayton

Well----if the crank is all you have in the motor , take it out and fit another cap---you can fit one with a dial guage by taking vertical measurement and then diangular to see if the off set is equal--you will need one that is equal side to side and if its bigger top to bottom you can cut it down until you get it to specs =====or ---

yep i done that if you have alot of caps you can get lucky GM was never that great on hitting dead center on the caps but i have bump them side by side when i have line bore them. with used steel cap or making a 2 bolt to a 4 bolt with gm used caps i bump them by welding the side face. then side face the cap in the cap cutter till it on center or close . i had a merlin a guy soild me with the wrong main cap # 3 bump it over got it on center but was tall by a 001.5 trim it in the sunnen cap cutter then lap it to .0001 call it good .no line bore