73-87chevytrucks.com

73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 355shortbed on February 03, 2009, 04:53:14 pm

Title: rear main cap torque specs.
Post by: 355shortbed on February 03, 2009, 04:53:14 pm

anybody know off hand the torque for rear main cap bolts and oil pump bolt, should be in 40's i believe????

Title: Re: rear main cap torque specs.
Post by: eventhorizon66 on February 03, 2009, 05:01:51 pm

Go with whatever Vile says  ;)

Title: Re: rear main cap torque specs.
Post by: VileZambonie on February 03, 2009, 05:36:31 pm

What engine are you talking about?

Title: Re: rear main cap torque specs.
Post by: 355shortbed on February 03, 2009, 06:22:41 pm

Oh whoops haha, 350

Title: Re: rear main cap torque specs.
Post by: VileZambonie on February 03, 2009, 06:34:25 pm

80lb-ft for the main cap and 65lb-ft for the oil pump bolt.

Title: Re: rear main cap torque specs.
Post by: 355shortbed on February 03, 2009, 06:36:44 pm

ok thanks alot

Title: Re: rear main cap torque specs.
Post by: frogman68 on February 03, 2009, 06:43:45 pm

 is it 2 bolt or 4 bolt mains?

4 bolt inners are 70 ft lbs outer 65 ft lbs up to 76

or 77 and up
inners are 80 ft lbs and outers 70 ft lbs

Title: Re: rear main cap torque specs.
Post by: 1976Scottsdale on February 04, 2009, 08:45:32 pm

Also 80 on cap bolts and 65 on oil pump as the rear is always a 2 bolt on a small block. Just make sure the cap is all the way down before you torque, have heard that pulling the cap down with the bolts is bad, but then again this post is way late and I am sure you have already completed the torquing of said cap.