| Olds 455 Remflex exhaust gasket differences [message #332133] |
Tue, 15 May 2018 19:21  |
Ty Hardiman
Messages: 43
Registered: April 2017
Location: Norman, Oklahoma
Karma: 0
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Member |
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Remflex makes two sizes of exhaust manifold gaskets for the 455:
One part is 11-002, for 1975 and later with 2 3/16" tall exhaust ports.
and one part is 11-003, for 1974 and earlier with 1 7/8" tall exhaust ports.
Is this a difference between "G" and "J" heads? In other words, could I buy Remflex gaskets based on whether I am working on a "G" head engine vs "J" head? This would allow me to order the correct gasket prior to pulling the manifold off and measuring.
Thanks in advance,
Ty
Norman, OK / August 1977 Kingsley / 403 / 3.55 / 16" / Quadrajet
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| Re: [GMCnet] Olds 455 Remflex exhaust gasket differences [message #332134 is a reply to message #332133] |
Tue, 15 May 2018 19:27  |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Ka heads have the bigger ports. "J" and "G" have smaller ones. But, 40
years are a long time, and "stuff" happens.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Tue, May 15, 2018, 5:21 PM Ty Hardiman wrote:
> Remflex makes two sizes of exhaust manifold gaskets for the 455:
> One part is 11-002, for 1975 and later with 2 3/16" tall exhaust ports.
> and one part is 11-003, for 1974 and earlier with 1 7/8" tall exhaust
> ports.
>
> Is this a difference between "G" and "J" heads? In other words, could I
> buy Remflex gaskets based on whether I am working on a "G" head engine vs
> "J"
> head? This would allow me to order the correct gasket prior to pulling the
> manifold off and measuring.
>
> Thanks in advance,
> Ty
> --
> Ty Hardiman, Norman, OK / Member FMCA-GMCMI-GMC Classics / August 1977
> Kingsley TZE167V102390 / 26' / 403 / 3.55 / 16" Wheels / Quadrajet / HEI /
> Previous Owners: Basil LeBlanc, Dan Ramker / Original Owner: William
> Strahm, Loveland, CO
>
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> GMCnet mailing list
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| Re: Olds 455 Remflex exhaust gasket differences [message #332138 is a reply to message #332133] |
Tue, 15 May 2018 21:05 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Senior Member |
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I cannot remember the difference. I have had that question before. But the 11-003 should be the one that fits. That is the one i was installing on my 75 palm beach with 455.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: Olds 455 Remflex exhaust gasket differences [message #332142 is a reply to message #332133] |
Tue, 15 May 2018 22:15 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Senior Member |
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Ty,
I have both a "J" head and a "K" head in my garage (sorry, no "G"). I just measured the height of the exhaust ports and both are identical at 1-7/8"
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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