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#1545505 05/01/2024 2:24 PM
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Is this correct. I assume metal side is toward heat source? Thanks
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One more thing. Can you use two gaskets between the manifolds? The alignment rings are not working after putting all together and removing again. Intake needs to be higher on head.

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Not certain I understand your question, exactly. Or questions. The shiny side of the gasket faces outward and the other side toward the head. The alignment rings are there only to provide a small ledge. "The intake needs to be higher on head" ??? higher as in it needs to sit higher or further away from the head? You can not use two of these gaskets. I've seen folks do that and they always leak. Your alignment rings are something like 3/16 inch thick. If you want a really good seal with this gasket simply use as directed the red variety of RTV sealant. Evan (Coilover) tells me he has used this on a straight 8 engine he has for over 30,000 miles with good results.


~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
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One other thing, breezy...you probably already know this but just attach the intake and exhaust manifolds loosely until you have them attached and tightened on the head. Then tighten the two together. That will let both seal better against the head.


~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
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Use the steel retaining rings on the intake to locate the intake to the head. Skip the stock gasket. Use a Rimflex gasket. Way better seal and much more forgiving.


Mike
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With the rings in head manifold will not go on. Hitting alignment pins on end of head. Seems exhaust manifold is warped an shrank up.

Last edited by breezy; 05/02/2024 6:30 PM.
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Originally Posted by Jon G
One other thing, breezy...you probably already know this but just attach the intake and exhaust manifolds loosely until you have them attached and tightened on the head. Then tighten the two together. That will let both seal better against the head.
I tried that and it worked but when I removed assembly it flexed back. Seems like alot of stress on exhaust manifold and I don't want it to crack. I removed it because my engine hoist bracket mounts to manifold bolt holes. Was hoping to install as a assembly. I'll just have to do it the loose and tighten way. Thanks Jon

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Originally Posted by Jon G
Not certain I understand your question, exactly. Or questions. The shiny side of the gasket faces outward and the other side toward the head. The alignment rings are there only to provide a small ledge. "The intake needs to be higher on head" ??? higher as in it needs to sit higher or further away from the head? You can not use two of these gaskets. I've seen folks do that and they always leak. Your alignment rings are something like 3/16 inch thick. If you want a really good seal with this gasket simply use as directed the red variety of RTV sealant. Evan (Coilover) tells me he has used this on a straight 8 engine he has for over 30,000 miles with good results.
The 2 gasket was for between manifolds. I spent hours working with a file and have the manifold almost perfect on head attachment plane.

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If one has manifold surfaces which are not true, and wanted them shaved to correct that᠁..

Would you have the machine shop surface then with the intake exhaust bolted together? Or separately?

I have always assumed it would be done with the pair bolted together.


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Jw51 I did it by hand with a long file. Blacksmith stuff. They are near perfect straight edge.

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Here is my problem. Not loose or centered when bolted tightly. If it were a small block I have the old spread bar for those.
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Head to manifold should be fine.
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The machine shop where I ran the connecting rod reconditioning department had a BIG belt sander- - - -like 18" wide and 4 feet long. It was perfect for truing up gasket surfaces- - - - -intake and exhaust manifolds- - - -flathead six cylinder heads, and any other surfaces that had to be straight and true across a long, wide area. Just use a carbide burr in a die grinder to enlarge those exhaust manifold end holes. The ends of the manifold need to be able to creep a little in the fore/aft dimension for heat expansion purposes.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
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Originally Posted by breezy
Jw51 I did it by hand with a long file. Blacksmith stuff. They are near perfect straight edge.

Right, mine was just a side question for the experts here. Better to file/sand/surface together as a pair or separately?


1951 3100
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Loosely bolted together, and a big belt sander is the "easy button" method. Be sure the trued up intake counterbores still have enough clearance for the alignment rings, even if you have to shorten the ring height a little to keep them from bottoming out.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!

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