Cracked exhaust manifold

Ken Shaffer

Member
Sep 6, 2017
99
2
8
I discovered a cracked manifold (left) on my 455. My thoughts were to try to find an original and have it re-surfaced. Does anyone have one they
want to sell or have any other suggestions?

--
Ken Shaffer
Marion Iowa
73 Canyon Lands, 455, Manny Tranny, Custom interior
 
Cinnabar has new reproductions. Better than welding cast and then doing it again.
--
John Lebetski
Woodstock, IL
77 Eleganza II
 
Ken,

I assume that when you say left side you mean driver side; if I am correct here's one for a Toronado on eBay:

Tiny URL: https://tinyurl.com/yc8g64un

Full URL:

https://www.ebay.com/itm/Left-Side-Exhaust-Manifold-From-a-1969-or-1970GT-Oldsmobile-Toronado-455-Engine/323211978398?hash=item4b40e
f669e:g:dBcAAOSwS15aJ0p6&vxp=mtr

Here's photos of the correct OEM manifolds for a 455:

http://www.gmcmhphotos.com/photos/g6894-oem-exhaust-manifolds.html

Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808


-----Original Message-----
From: Gmclist [mailto:gmclist-bounces] On Behalf Of Ken Shaffer
Sent: Thursday, April 19, 2018 5:13 PM
To: gmclist
Subject: [GMCnet] Cracked exhaust manifold

I discovered a cracked manifold (left) on my 455. My thoughts were to try to find an original and have it re-surfaced. Does anyone
have one they want to sell or have any other suggestions?

--
Ken Shaffer
Marion Iowa
73 Canyon Lands, 455, Manny Tranny, Custom interior

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Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
My manifold is stamped with a J and number is 407108 LH.
Yes, the driver side.

Do you know if this manifold will work?
https://www.ebay.com/itm/Left-Side-Exhaust-Manifold-From-a-1969-or-1970GT-Oldsmobile-Toronado-455-Engine/323211978398?hash=item4b40ef669e:g:dBcAAOSwS15aJ0p6&vxp=mtr

On Thu, Apr 19, 2018 at 5:46 PM, Rob Mueller
wrote:

> Ken,
>
> I assume that when you say left side you mean driver side; if I am correct
> here's one for a Toronado on eBay:
>
> Tiny URL: https://tinyurl.com/yc8g64un
>
> Full URL:
>
> https://www.ebay.com/itm/Left-Side-Exhaust-Manifold-From-a-
> 1969-or-1970GT-Oldsmobile-Toronado-455-Engine/323211978398?hash=item4b40e
> f669e:g:dBcAAOSwS15aJ0p6&vxp=mtr
>
> Here's photos of the correct OEM manifolds for a 455:
>
> http://www.gmcmhphotos.com/photos/g6894-oem-exhaust-manifolds.html
>
> Regards,
> Rob M.
> The Pedantic Mechanic
> Sydney, Australia
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
> USA '77 Kingsley - TZE 267V100808
>
>
>
> -----Original Message-----
> From: Gmclist [mailto:gmclist-bounces] On Behalf Of Ken
> Shaffer
> Sent: Thursday, April 19, 2018 5:13 PM
> To: gmclist
> Subject: [GMCnet] Cracked exhaust manifold
>
> I discovered a cracked manifold (left) on my 455. My thoughts were to try
> to find an original and have it re-surfaced. Does anyone
> have one they want to sell or have any other suggestions?
>
> --
> Ken Shaffer
> Marion Iowa
> 73 Canyon Lands, 455, Manny Tranny, Custom interior
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
Ken,

Look at this photo:

http://www.gmcmhphotos.com/photos/oem-exhaust-manifolds/p59709-gmc-ex-081.html

Note that it too is marked with a J but the part number is 407103 LH. Are you SURE yours is 407108 LH.

I provided the photos so you could compare the two manifolds and decide for yourself if they would work.

That was because I was not going to tell you it would work and you order it and it not fit.

Call Cinnabar (800) 720-2227 and ask how much they want for a replacement then you can decide if you want gamble on the one on eBay
working.

Good luck.

Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808


-----Original Message-----
From: Gmclist [mailto:gmclist-bounces] On Behalf Of Ken Shaffer
Sent: Friday, April 20, 2018 12:35 PM
To: gmclist
Subject: Re: [GMCnet] Cracked exhaust manifold

My manifold is stamped with a J and number is 407108 LH.
Yes, the driver side.

Do you know if this manifold will work?
https://www.ebay.com/itm/Left-Side-Exhaust-Manifold-From-a-1969-or-1970GT-Oldsmobile-Toronado-455-Engine/323211978398?hash=item4b40e
f669e:g:dBcAAOSwS15aJ0p6&vxp=mtr