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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: COREY13 on April 25, 2016, 06:59:01 pm

Title: Bearing clearances
Post by: COREY13 on April 25, 2016, 06:59:01 pm

Hey guys, just wondering, what should my clearances be on my rod and main bearings when tq'd? Motor is a 350. I looked through the service manual, but im kinda confused by it. I have some green plastigauge, just wonderibg what exactly they should be.

Title: Re: Bearing clearances
Post by: VileZambonie on April 26, 2016, 09:44:48 am

generally speaking .001"-.003"

Title: Re: Bearing clearances
Post by: COREY13 on April 27, 2016, 12:07:23 am

Thats what i was thinking when i was going through the manual, it was just a little all over the place i guess is how you would say it. Or at least it was to me... is that for the main bearings and the rod bearings?

Title: Re: Bearing clearances
Post by: VileZambonie on April 27, 2016, 12:22:51 pm

Yes and generally speaking if you are on the loose side you want to run a high volume oil pump. If it's tight, run a standard volume.