| exhaust manifold gasket Thorley headers [message #279827] |
Sat, 13 June 2015 19:51  |
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dservati1
Messages: 109
Registered: December 2013
Location: Western New York -Rochest...
Karma: 1
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everybody quick question I have Thorley headers on my '78 403 and as I reported last year there is a bad leak on the passenger side exhaust manifold. I want to put a new header gasket in which REM flex gasket should be used, 11-002 REM flex or 11-001 well either of those work or do I need a different gasket because I have the Thorley headers thanks in advance.
'78 Palm Beach. car nut new to RV'ing 26 ft. 403 rebuilt in 2018, rebuilt tranny in 2014, Dave Lenzi knuckles & hubs, yada yada yada on ION wheels,Green Brady Bunch stock
David Martin on Facebook
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| Re: exhaust manifold gasket Thorley headers [message #279839 is a reply to message #279827] |
Sat, 13 June 2015 21:20  |
Joe Weir
Messages: 769
Registered: February 2013
Location: Columbia, SC
Karma: 7
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I hope so. I installed a set on my 455 with Thorleys. 
76 Birchaven - "Wicked Mistress" - New engine, trans, alum radiator, brakes, Sully airbags, fuel lines, seats, adult beverage center... those Coachmen guys were really thinking about us second hand owners by including that beverage center...
Columbia, SC.
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| Re: exhaust manifold gasket Thorley headers [message #279840 is a reply to message #279839] |
Sat, 13 June 2015 21:39 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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The Remflex with the middle exhaust port as a large rectangler shaped port is for the cast iron manifold. The Remflex with the divided middle exhaust port is for the header version.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] exhaust manifold gasket Thorley headers [message #279862 is a reply to message #279840] |
Sun, 14 June 2015 05:55 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Just curious: Why bother with a gasket having the middle exhaust port
divided? After all, the port itself is not, normally, divided itself so
that middle "rib" will almost immediately burn away whether a manifold or
headers is mounted.
Now for those few who have cylinder heads which have been modified by
dividing the exhaust port, it IS important to have that rib.
JMHO,
Ken H.
On Sat, Jun 13, 2015 at 10:39 PM, Thomas Phipps wrote:
> The Remflex with the middle exhaust port as a large rectangler shaped port
> is for the cast iron manifold. The Remflex with the divided middle exhaust
> port is for the header version.
> Tom, MS II
>
>
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Ken Henderson
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www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: exhaust manifold gasket Thorley headers [message #279884 is a reply to message #279827] |
Sun, 14 June 2015 15:07 |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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dservati1 wrote on Sat, 13 June 2015 17:51everybody quick question I have Thorley headers on my '78 403 and as I reported last year there is a bad leak on the passenger side exhaust manifold. I want to put a new header gasket in which REM flex gasket should be used, 11-002 REM flex or 11-001 well either of those work or do I need a different gasket because I have the Thorley headers thanks in advance.
My rebuild was installed with FelPro 1439 and that is what I am going to use to replace the left side after getting the governor out.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
[Updated on: Sun, 14 June 2015 15:08] Report message to a moderator |
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