The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - can you replace one main bearing cap without line boring

BigBlocksRule · 08-07-2012, 07:45 AM

Take it to your machine shop, most have buckets of caps that have been salvaged off of old blocks. Mine took the time to check several, ended up with one that was a dead-on fit. Saved me some money for sure!

And if you're watching Horsepower TV to learn how to build one, DON'T!!! I cringe every time I see those guys smacking main caps down into the registers with a hammer. You're applying what amounts to reverse direction detonation when you do that. Snug 'em down, then tighten the bolts to get the cap to snap down into the registers.

08-07-2012, 07:45 AM	#6
BigBlocksRule Registered User Join Date: Jun 2008 Location: Lubbock, TX Posts: 2,047	Re: can you replace one main bearing cap without line boring Take it to your machine shop, most have buckets of caps that have been salvaged off of old blocks. Mine took the time to check several, ended up with one that was a dead-on fit. Saved me some money for sure! And if you're watching Horsepower TV to learn how to build one, DON'T!!! I cringe every time I see those guys smacking main caps down into the registers with a hammer. You're applying what amounts to reverse direction detonation when you do that. Snug 'em down, then tighten the bolts to get the cap to snap down into the registers.