Thread: I broke a main cap. Please advise

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The biggest issue when using a cap from a different engine is the lateral offset( reason the op broke his cap by putting it on backwards) With the proper lateral spacing it then becomes a vertical diminsion issue--too big, the cap needs to be cut, too little it needs to be bored---or shimmed.

Also---for the op---the cap can be built up with weld and machined back to fit the recess in the block with a simple flat file!!!

I consider my equipment to be top level and my abilities/experience to match--I probably line bore/hone REPAIR a deal such as this every month or so and as for just the routine line bore/hone operation weekly plus all the billet spayed caps that we install on the engines we sell ( currently we are doing several LT sbc blocks to 383/396 strokers)---
the touchiest part of the process still is cutting the stock caps flat as they are not square so that they fit in a cap grinder straight---always takes some finess

Originally Posted by jerry clayton

the touchiest part of the process still is cutting the stock caps flat as they are not square so that they fit in a cap grinder straight---always takes some finess

yep rods can be like that as well i do a very lite cut take it out look at it and if needed i get out the sunnen shim kit i have the sunnen shim kit for the 750 sunnen cap cutter just for the main caps and rods/ caps . that goodson white stone works very good jerry .... on the cap cutters like we have . i just cut the resters down on a dart big M that i did not want to over cut the main caps