Exhaust manifold bolt locks - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Happy_dan · 03-26-2021, 07:12 AM

I am finishing up my engine rebuild and getting ready to reinstall the exhaust manifolds. When I took them off, the lock thingies broke in pieces from corrosion. Does anyone know where I can get new ones or ones in good condition. I want to keep the truck as original looking as possible so I would like to have the original looking locks.

sambrutay · 03-26-2021, 07:28 AM

GM parts # 3880844 https://www.classicindustries.com/product/pr1161k.html

**Grumpy old man** · 03-26-2021, 07:31 AM

Classic parts

Don't forget anti seize on the bolts .

https://www.classicparts.com/1967-84...nfo/EN%2D2820/

Happy_dan · 03-26-2021, 07:56 AM

Thank you sir, saved that site for sure and got it on the antiseize!

mr.mud1 · 03-26-2021, 11:15 AM

Quote:

Originally Posted by Happy_dan

Thank you sir, saved that site for sure and got it on the antiseize!

hi Dan,great progress.i think you'll also find,if they didn't rust away,a small diameter but thick flat washer under the heads of the exhaust manifold bolts.i probably have some here i can mail to you if yours are gone or in bad shape.

Happy_dan · 03-26-2021, 11:24 AM

I will look to make sure, I think they are there.
I will let you know in my next update to you.

Thanks Greg!

**MJN** · 03-26-2021, 12:45 PM

Corvette Central has the french locks, bolts and washers too
https://www.corvettecentral.com/c3-6...olds/?count=18

03-26-2021, 07:12 AM	#1
Happy_dan Registered User Join Date: Jul 2019 Location: New Boston, NH Posts: 456	Exhaust manifold bolt locks I am finishing up my engine rebuild and getting ready to reinstall the exhaust manifolds. When I took them off, the lock thingies broke in pieces from corrosion. Does anyone know where I can get new ones or ones in good condition. I want to keep the truck as original looking as possible so I would like to have the original looking locks.

03-26-2021, 07:28 AM	#2
sambrutay Registered User Join Date: Dec 2010 Location: Louisville KY Posts: 622	Re: Exhaust manifold bolt locks GM parts # 3880844 https://www.classicindustries.com/product/pr1161k.html __________________ Bruce 1964 C10 SWB #Junk 1979 C10 utility #cargopants (sold) 1971 GMC Sprint (sold) 1974 GMC Grande Sierra (sold)

03-26-2021, 07:31 AM	#3
Grumpy old man Senior Member Join Date: Dec 2013 Location: Gods country East,Tn Posts: 8,545	Re: Exhaust manifold bolt locks Classic parts Don't forget anti seize on the bolts . https://www.classicparts.com/1967-84...nfo/EN%2D2820/ Attached Images __________________ 1967 Factory short bed - Old school '71 - 350 / 4bolt / 487 heads / Edelbrock C3BX Muncie M-22 4 speed / Hurst Comp plus Factory 12 bolt posi 3.73 / 255-70-15 Smoothed firewall / Factory cowl induction Power disc brakes / power steering / 3.5-5" drop

03-26-2021, 07:56 AM	#4
Happy_dan Registered User Join Date: Jul 2019 Location: New Boston, NH Posts: 456	Re: Exhaust manifold bolt locks Thank you sir, saved that site for sure and got it on the antiseize!

03-26-2021, 11:24 AM	#6
Happy_dan Registered User Join Date: Jul 2019 Location: New Boston, NH Posts: 456	Re: Exhaust manifold bolt locks I will look to make sure, I think they are there. I will let you know in my next update to you. Thanks Greg!

03-26-2021, 12:45 PM	#7
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 3,051	Re: Exhaust manifold bolt locks Corvette Central has the french locks, bolts and washers too https://www.corvettecentral.com/c3-6...olds/?count=18 __________________ '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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