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Yesterday, 11:24 AM | #1 |
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Join Date: Sep 2019
Location: Dade City
Posts: 58
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57 GMC 550 370 V8 exhaust gaskets
Might be in the wrong place but does anyone know where I could get a set of exhaust gaskets for this truck. My research says it's a 370 Pontiac or Olds engine.
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Yesterday, 11:45 AM | #2 |
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Join Date: Aug 2009
Location: Bowser
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Re: 57 GMC 550 370 V8 exhaust gaskets
That’s one mean looking truck!
Pop the hood and devour all the Prius’s on the road! Contact Bob. He might have what you want. It’s a Pontiac by the way. https://www.bopparts.com/1957-pontia...asket-set.html There are others too. https://butlerperformance.com/i-2445...9498-sh-1.html |
Yesterday, 11:46 AM | #3 |
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Re: 57 GMC 550 370 V8 exhaust gaskets
My education for the day. I knew that the smaller trucks ran Pontiac V8 engines but this says that there should be an Olds engine in that truck. Only used in those larger trucks according to this info https://www.jalopyjournal.com/forum/...re-371.606092/
They should look like this https://www.ebay.com/itm/15274972038...C_6h4k297cm0UI These are correct for 57/58.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
Yesterday, 11:55 AM | #4 |
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Re: 57 GMC 550 370 V8 exhaust gaskets
Post a pic of the motor.
Always visual clues to decide what it is. |
Yesterday, 12:01 PM | #5 | |
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Re: 57 GMC 550 370 V8 exhaust gaskets
Quote:
That would be a good idea as you don't know what someone might have done on a work truck of that era.
__________________
Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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Yesterday, 12:15 PM | #6 |
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Join Date: Sep 2019
Location: Dade City
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Re: 57 GMC 550 370 V8 exhaust gaskets
I think I found some at local parts store, we'll see when they come in. Had to cancel order, asked parts man and he said center manifold bolt holes are horizontal, mine are vertiical. Everything I saw on fleabay for a 370 has horizontal holes. I might have to make my own.
Last edited by prateroad; Yesterday at 09:04 PM. |
Yesterday, 12:19 PM | #7 |
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Re: 57 GMC 550 370 V8 exhaust gaskets
C’mon, don’t tease us!
Where’s the engine pic? |
Today, 08:56 AM | #8 |
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Re: 57 GMC 550 370 V8 exhaust gaskets
Well, I see it on my end.
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Today, 09:42 AM | #9 |
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Re: 57 GMC 550 370 V8 exhaust gaskets
Any info I found since last post says it’s a Pontiac 347.
Try that for gasket matching. |
Today, 11:37 AM | #10 |
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Join Date: Nov 2010
Location: calgary alberta
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Re: 57 GMC 550 370 V8 exhaust gaskets
if you could draw a rough outline of what your manifild gasket may look like that may help. if it has had a leak for quite some time the gasket surfaces on the manifold or head may have been eroded. when you get to it, ensure to lay a straight edge on the gasket surfaces of the sealing areas to check for warpage. if you cant find a gasket you can always make one from the right gasket material.
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Today, 11:38 AM | #11 |
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Join Date: Nov 2010
Location: calgary alberta
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Re: 57 GMC 550 370 V8 exhaust gaskets
the gm heritage center may be able to tell you what the truck originally came with for options etc and engine size. dunno if that would help.
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Today, 11:40 AM | #12 |
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Join Date: Nov 2010
Location: calgary alberta
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Re: 57 GMC 550 370 V8 exhaust gaskets
is the 347 and 370 not the same engine family? heads and manifolds would interchange so gaskets would be the same then?
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Today, 12:31 PM | #13 |
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Join Date: Jul 2007
Location: Toppenish, WA
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Re: 57 GMC 550 370 V8 exhaust gaskets
Your engine is indeed Olds based rather than Pontiac.
This is a photo of a 57 Olds 371 engine in a 57 Olds. The smaller trucks had Pontiac based engines but the 550 and larger had the Olds based engine.
__________________
Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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