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11-29-2021, 01:18 PM
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#1 |
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Senior Member
 
Join Date: Jul 2015
Location: Phoenix, AZ
Posts: 1,333
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A/C bracket bolt question
Have a question for you guys. All the bracketry was removed from my engine for the stock A/C system prior to my ownership. Stock 74 454 truck. Since sourced said brackets, now I need bolts to connect them.
Are the threads in the heads and block to mount the brackets fine or course threads? They seem to be coarse, but I didn't want to screw up the threads by tightening in my test bolts (I still need to get the correct lengths) Also, should I go with grade 8 for strength or 5 so there's some slight flex so they don't just shear off due to potential vibration? Thanks. |
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11-29-2021, 01:22 PM
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#2 |
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Registered User
Join Date: Feb 2000
Location: Maquoketa, Ia/ Orr, Mn
Posts: 2,963
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Re: A/C bracket bolt question
They're all coarse thread and grade 5 bolts will be more than strong enough.
__________________
'51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com |
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11-29-2021, 01:25 PM
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#3 | |
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Senior Member
Join Date: Jul 2015
Location: Phoenix, AZ
Posts: 1,333
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Re: A/C bracket bolt question
Quote:
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