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Old 05-01-2009, 09:51 PM
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Torque spec on BBC oil pump?

Misplaced my books, whats the torque spec for the oil pump stud on a BBC?

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Old 05-01-2009, 11:37 PM
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BBC specs

Well, that really depends on what you go by. Haynes manuals usually understate the TQ specs, Chilton's manuals leave out the details, Motors manuals are about the best you can get, but from working on Helicopters and airplanes, I can safely say that the standard TQ spec on a 1/4" corse thread oil pump bolt is 40 foot pounds. 50-60 on a fine thread. But then again, this is something that won't leave the ground, so if you feel confortable at 40, or 50, use it. The factory manual calls for 45 depending on the year, make, model, and whether it had 4 bolt mains or not, but automotive work is not an exact science, 40 is a good bet, it has served us Curley boys well for 30 years on our SBC and BBC race engines of various sizes, types, and configurations.
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Old 05-02-2009, 06:16 AM
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Quote:
Originally Posted by 540neverdone
Misplaced my books, whats the torque spec for the oil pump stud on a BBC?
Oil pump bolt (7/16-14) to cap is 65 ft/lbs.
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Old 05-02-2009, 05:19 PM
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Hmm, 40-65lbft is a pretty wide range.
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Old 05-02-2009, 07:36 PM
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It is 65 ft lbs....no doubt about it.
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Old 05-02-2009, 09:31 PM
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Thanks guys, its an ARP stud, Im sure can handle 65. Thanks again.
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Old 05-03-2009, 12:09 AM
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Quote:
Originally Posted by 540neverdone
Thanks guys, its an ARP stud, Im sure can handle 65. Thanks again.
ARP says 71 ft/lbs for a 7/16" stud- lubed w/30W oil.

If lubed w/ARP moly, the torque required to get the 1270 lbs. preload is 56 ft/lb.

Bolts are 2 ft/lb more for either type lube.
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Old 05-03-2009, 03:18 PM
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Cobalt is there a site you can use to verify torque on ARP fasteners?
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Old 05-03-2009, 03:30 PM
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Quote:
Originally Posted by 540neverdone
Cobalt is there a site you can use to verify torque on ARP fasteners?
The torques I quoted are from an ARP catalog. I don't know of a web site.
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Old 05-03-2009, 06:31 PM
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Thanks, didn't doubt you, just thought I wouldn't have to bug you again if I knew!
Thanks Again
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