[leastbay]

i want to take my preformer rpm manifold off of my 350 tommorrow and polish it which part number can i use to replace it and if i remember correctly just use the sides and use rtv for the front and back right?

[Max Keith]

Unless you have done some extensive runner mods, I would go with the stock intake gasket set for the engine in your car. As for the front and rear gaskets, Unless you have had the heads milled, why would you want to just delete them and use rtv instead? The best way is to use the rtv at the corners where the gaskets meet and maybe a few dabs on the front and rear gaskets just to keep them in place while you drop on your intake.

[302 Z28]

Follow the above advice and use Fel-Pro gaskets only.

Vince

[leastbay]

for some reason i thought the fornt and rears push out after a while i must be thinking of somethiing else thanks

[lluciano77]

Originally posted by Max Keith
Unless you have done some extensive runner mods, I would go with the stock intake gasket set for the engine in your car. As for the front and rear gaskets, Unless you have had the heads milled, why would you want to just delete them and use rtv instead? The best way is to use the rtv at the corners where the gaskets meet and maybe a few dabs on the front and rear gaskets just to keep them in place while you drop on your intake.

Nevere use the end seals. RTV across the fromt and rear is always better.

[leastbay]

thanks for the clarification

[Max Keith]

Think about it. They dont put those end pieces in there for nothing. If a person has problems with them, its installer error, as a rule. Ive been using gaskets all my life and have found that unless there has been some drastic modifications, and even in most cases, if there have been, that to follow the general guidelines of the manufacturers is the best way out. I am quite sure if you were to ask the manufacturer of the intake and your engine both, they would agree with me.

[AngliaBob]

I don't know the reasoning for it, but, Edelbrock suggests you use RTV for the front and rear gasket areas. I have installed a Performer RPM and an AirGap, with this method, and haven't experienced any problems.

[Max Keith]

Awesome, thats a new one to me.

[Siggy_Freud]

I've seen literature where Fel-pro actually reccomends deleting the end seal gaskets and using RTV. I'll have to see if I can find it.

In the past few intake manifold gasket sets I've bought, there havent been the end seals, just a larger tube of Black RTV.

[Max Keith]

Well, it has been a few years since I bought a new intake. Guess some things do change.

[454me]

I just put on an rpm manifold and the instructions in it said to not use the end gaskets and to use rtv there instead. Read the instructions they said something about not using a certain type of gasket also. I dont remember which one off my head. If you really need to know and dont have the instructions I can go out and get them. Let me know if you need them.

Gary

[leastbay]

yeah i really need to know which one to buy thanks

[tornado-tech]

You want to use Fel-Pro Printoseal or similar intake gaskets. DO NOT use the Fel-Pro Permatorque intake gaskets. The Permatorque's will not seal an aluminum intake manifold to cast-iron heads. The Permatorque's are a stock replacement gasket. You can use either the 1204 or 1256. Here is also a link for you:http://www.edelbrock.com/automotive/...ral_instr.html

[MontegoMX]

Leastbay, The Felpro Part Number is a #MS15315.

This is a basic Chevy 350 Intake Manifold Set for a wide range of years!

I took the Initiative to pull this gasket set off the shelf in my store to look at what it contains and there are End Seals and no Notation on whether to use them or not! What I did notice is that these End seals are quite different than ones I have seen before. These end seals have vertical ears coming of the seal that hold it in place on the block.

From my experience the reason these end seals are a problem is because they like to slide out when torquing the Manifold. I use an Aviation gasket sealer on the "Block to seal" surface, let that dry completely so the seal is held in place then use a tiny bit of RTV on the "Manifold to seal" area. These Improved seals look like they might help that issue Hope this helps!

Good Luck