Exhaust Manifold Bolts/Washers ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Daddy'O · 06-29-2012, 07:32 AM

Educate me please.

I have a pair of ram horn exhaust manifolds and have been told I need special washers for the exhaust manifold bolts. I purchased a new set of bolts from classic parts and they did not come with washers. Would someone confirm the need of these special washers & possibly provide a source for them?

Thanks!

geezer#99 · 06-29-2012, 09:46 AM

Most people just throw them away but here's some.
http://www.gmclassicparts.com/EXHAUS...C_p_26794.html

Daddy'O · 06-29-2012, 10:10 AM

Great! Thanks for the link.

Now - are these washers as necessary as I've been told? And what are special about them as compared to a regular old run of the mill washer?

Thanks!

Dano69c10 · 06-29-2012, 12:39 PM

I have used run of the mill grade 8 bolts and washers on my ramhorns since the early 80's with no problems....

Wrenchbender Ret · 06-29-2012, 04:59 PM

I use grade 8 bolts & SAE grade 8 washers on all of them.

GASoline71 · 06-29-2012, 05:40 PM

^^^^ What WR said...

Gary

Daddy'O · 06-30-2012, 06:59 AM

So - absolutely nothing 'special' about the factory washers?

Sport/Truck · 06-30-2012, 09:47 AM

Quote:

Originally Posted by Daddy'O

So - absolutely nothing 'special' about the factory washers?

They also use a locking tab thing that goes under two bolts and the tab folds up to lock them in. I don't have a good picture of it, but you can see them on this picture.
s/t

Daddy'O · 06-30-2012, 10:31 AM

I just had an epiphany!

I think that’s what I was being told was ‘special’ – not the washer but the French lock.

Thanks s/t!

Wrenchbender Ret · 06-30-2012, 04:33 PM

The factory washers were smaller in dia. & a little thicker but SAE washer are close & work good.

06-29-2012, 07:32 AM	#1
Daddy'O Registered User Join Date: Jan 2012 Location: Whitesboro, Texas Posts: 932	Exhaust Manifold Bolts/Washers ? Educate me please. I have a pair of ram horn exhaust manifolds and have been told I need special washers for the exhaust manifold bolts. I purchased a new set of bolts from classic parts and they did not come with washers. Would someone confirm the need of these special washers & possibly provide a source for them? Thanks! __________________ Cheers - Wayne Our Shop Build - http://67-72chevytrucks.com/vboard/s...d.php?t=620966 '55 Wagon Build - http://67-72chevytrucks.com/vboard/s...d.php?t=689157 1971 Cheyenne Super Ochre/White LWB 350 Auto - my son's truck "Nancy" 1972 GMC K2500 Custom 4X4 Olive LWB 400 SB 4-speed -"Greenie" - Restoration to begin after the '55 Nothing sucks more than that moment during an argument when you realize you're wrong.

06-29-2012, 09:46 AM	#2
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,575	Re: Exhaust Manifold Bolts/Washers ? Most people just throw them away but here's some. http://www.gmclassicparts.com/EXHAUS...C_p_26794.html

06-29-2012, 10:10 AM	#3
Daddy'O Registered User Join Date: Jan 2012 Location: Whitesboro, Texas Posts: 932	Re: Exhaust Manifold Bolts/Washers ? Great! Thanks for the link. Now - are these washers as necessary as I've been told? And what are special about them as compared to a regular old run of the mill washer? Thanks! __________________ Cheers - Wayne Our Shop Build - http://67-72chevytrucks.com/vboard/s...d.php?t=620966 '55 Wagon Build - http://67-72chevytrucks.com/vboard/s...d.php?t=689157 1971 Cheyenne Super Ochre/White LWB 350 Auto - my son's truck "Nancy" 1972 GMC K2500 Custom 4X4 Olive LWB 400 SB 4-speed -"Greenie" - Restoration to begin after the '55 Nothing sucks more than that moment during an argument when you realize you're wrong.

06-29-2012, 12:39 PM	#4
Dano69c10 Senior Member Join Date: Jan 2005 Location: Ontario, Kali Posts: 2,427	Re: Exhaust Manifold Bolts/Washers ? I have used run of the mill grade 8 bolts and washers on my ramhorns since the early 80's with no problems.... __________________ '69 Fleet It ain't yours, if you didn't build it! Last edited by Dano69c10; 06-29-2012 at 06:58 PM.

06-29-2012, 04:59 PM	#5
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,208	Re: Exhaust Manifold Bolts/Washers ? I use grade 8 bolts & SAE grade 8 washers on all of them.

06-30-2012, 06:59 AM	#7
Daddy'O Registered User Join Date: Jan 2012 Location: Whitesboro, Texas Posts: 932	Re: Exhaust Manifold Bolts/Washers ? So - absolutely nothing 'special' about the factory washers? __________________ Cheers - Wayne Our Shop Build - http://67-72chevytrucks.com/vboard/s...d.php?t=620966 '55 Wagon Build - http://67-72chevytrucks.com/vboard/s...d.php?t=689157 1971 Cheyenne Super Ochre/White LWB 350 Auto - my son's truck "Nancy" 1972 GMC K2500 Custom 4X4 Olive LWB 400 SB 4-speed -"Greenie" - Restoration to begin after the '55 Nothing sucks more than that moment during an argument when you realize you're wrong.

06-30-2012, 10:31 AM	#9
Daddy'O Registered User Join Date: Jan 2012 Location: Whitesboro, Texas Posts: 932	Re: Exhaust Manifold Bolts/Washers ? I just had an epiphany! I think that’s what I was being told was ‘special’ – not the washer but the French lock. Thanks s/t! __________________ Cheers - Wayne Our Shop Build - http://67-72chevytrucks.com/vboard/s...d.php?t=620966 '55 Wagon Build - http://67-72chevytrucks.com/vboard/s...d.php?t=689157 1971 Cheyenne Super Ochre/White LWB 350 Auto - my son's truck "Nancy" 1972 GMC K2500 Custom 4X4 Olive LWB 400 SB 4-speed -"Greenie" - Restoration to begin after the '55 Nothing sucks more than that moment during an argument when you realize you're wrong.

06-30-2012, 04:33 PM	#10
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,208	Re: Exhaust Manifold Bolts/Washers ? The factory washers were smaller in dia. & a little thicker but SAE washer are close & work good.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.