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  #1  
Old September 30th, 2024, 07:54 PM
bigred1 bigred1 is offline
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Default fuel pump bolts what torque spec

how much torque is needed for fuel pump bolts on a gmc 305 v6?
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Old October 1st, 2024, 01:41 AM
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Funky61 Funky61 is offline
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Default Re: fuel pump bolts what torque spec

Strange, No number is given after searching in two manuals.
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Old October 1st, 2024, 03:02 AM
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Default Re: fuel pump bolts what torque spec

Funky, use this chart. Use Gr 5. We don't ever need gr 8 on an old truck. You are probably talking 1/4 or 5/16. Anyway, for future, measure the OD of bolt threads, calculate or measure pitch. (fine or coarse) and use the chart. This is a small bolt, it is performing a gasket clamping function in this case. Not holding a bracket, etc. No high torque here. Just snug and a tiny more. Keep hand near where wrench handle meets socket so you can't get much handle leverage. Other cases with small bolts and non gasket, snug plus slow turn to "tight". Torque wrench can be used. As bolt size gets bigger 3/8 7/16 1/2.. use clicker torque wrench. Normally a person can tell by feel that you are getting into the elastic stage....that's a no no. I hardly ever use a torque wrench except on a critical big thread size.. .
Lug nuts, head bolts, pinion nut, axle, steering stuff. You just get a feel after awhile.
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The charts do not contemplate a gasket/sealer scenario. Read sealer instructions if used. You are only sealing an oil leak, and mechanical support against cam lever load, not fuel pressure.
No big deal. BUT!!! 1/4-20 are the most dangerous bolts we use. Head will snap off. Oil pans and diff covers are in this gasket/small bolt/oil leak category. Water pump needs caution also. Fastener work/restoration needs calipers, thread gauge, taps and dies and torque wrench.

SBC specs say 8-11 Ft Lbs for fuel pump. Cast iron thread and gr 5 bolt.

Last edited by AZKen; October 1st, 2024 at 06:35 PM.
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Old October 4th, 2024, 09:19 AM
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Default Re: fuel pump bolts what torque spec

Very sorry Funky....I addressed the wrong person. I should have said Big Red....not you. You were providing help and I skipped a beat when reading the posts.
The advice/suggestions apply to BigRed

Last edited by AZKen; October 4th, 2024 at 09:44 AM.
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Old October 9th, 2024, 05:30 PM
jerrspud jerrspud is offline
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Default Re: fuel pump bolts what torque spec

Quote:
Originally Posted by bigred1 View Post
how much torque is needed for fuel pump bolts on a gmc 305 v6?
snug
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