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tall deck and intake spacer plates

Posted: Tue Oct 08, 2019 7:41 pm
by Kurshuk
On a Tall deck 9.325 sbc block, are you using gaskets on both sides of the plates, just RTV, or gaskets between the plates and intake and rtv between the block and spacers? :?

If just using rtv… which do you use? Its seem more are using the ultra gray type of rtv. I would think getting the intake manifold off would be difficult to say the least just using rtv.

Re: tall deck and intake spacer plates

Posted: Tue Oct 08, 2019 8:33 pm
by Coloradoracer
I'm running a big block but have spacers. I run gaskets on both sides, only silicone the end rails and very thin coat around the water ports... 10.7" deck on my stuff running a 10.2" version intake.

Re: tall deck and intake spacer plates

Posted: Wed Oct 09, 2019 1:51 pm
by Kurshuk
Thanks for the reply... I have seen a picture of an engine with the spacers and there was no gaskets just gray rtv, like ultra gray. That would have to be difficult to remove I would think.

:-k :-k

Re: tall deck and intake spacer plates

Posted: Wed Oct 09, 2019 7:56 pm
by norm
Whatever you decide make sure it will hold up to fuel.

From the last line of the instructions-- "NOTE: Not recommended for use on head gaskets or on parts in contact with gasoline."


https://www.permatex.com/products/gaske ... t-maker-2/

Re: tall deck and intake spacer plates

Posted: Thu Oct 10, 2019 1:41 pm
by 67RS502
If youre going to be pulling the intake, you can use small screws on the spacers and mount the spacers to the head, so they are part of the heads, enabling you to pull the intake off.

Re: tall deck and intake spacer plates

Posted: Thu Oct 10, 2019 6:50 pm
by Schurkey
norm wrote:
Wed Oct 09, 2019 7:56 pm
Whatever you decide make sure it will hold up to fuel.

From the last line of the instructions-- "NOTE: Not recommended for use on head gaskets or on parts in contact with gasoline."


https://www.permatex.com/products/gaske ... t-maker-2/
RTV silicone tends to dissolve in gasoline. Permatex "The Right Stuff" does not list gasoline as an approved liquid.

However, Good Old Permatex #3 "Aviation sealer" says it's good for joining machined surfaces, AND it's gasoline resistant. Sounds like just the thing to attach a nice, flat spacer to a nice, flat cylinder head gasket surface.

Re: tall deck and intake spacer plates

Posted: Thu Oct 10, 2019 10:44 pm
by Kurshuk
67RS502 wrote:
Thu Oct 10, 2019 1:41 pm
If youre going to be pulling the intake, you can use small screws on the spacers and mount the spacers to the head, so they are part of the heads, enabling you to pull the intake off.
Thanks! will definitely do that. I was thinking of dowels to keep everything aligned. :)

Re: tall deck and intake spacer plates

Posted: Thu Oct 10, 2019 11:20 pm
by Kurshuk
norm wrote:
Wed Oct 09, 2019 7:56 pm
Whatever you decide make sure it will hold up to fuel.

From the last line of the instructions-- "NOTE: Not recommended for use on head gaskets or on parts in contact with gasoline."


https://www.permatex.com/products/gaske ... t-maker-2/
Fuel for this engine is Methanol... so maybe it would be ok. Thanks for pointing that out!

Re: tall deck and intake spacer plates

Posted: Thu Oct 10, 2019 11:24 pm
by Kurshuk
Schurkey wrote:
Thu Oct 10, 2019 6:50 pm
norm wrote:
Wed Oct 09, 2019 7:56 pm
Whatever you decide make sure it will hold up to fuel.

From the last line of the instructions-- "NOTE: Not recommended for use on head gaskets or on parts in contact with gasoline."


https://www.permatex.com/products/gaske ... t-maker-2/
RTV silicone tends to dissolve in gasoline. Permatex "The Right Stuff" does not list gasoline as an approved liquid.

However, Good Old Permatex #3 "Aviation sealer" says it's good for joining machined surfaces, AND it's gasoline resistant. Sounds like just the thing to attach a nice, flat spacer to a nice, flat cylinder head gasket surface.
Not sure how that would work with methanol, you thin #3 with alcohol. Would have to look into that one. I have this on the shelf... will have to test it. Thanks!

Re: tall deck and intake spacer plates

Posted: Fri Oct 11, 2019 3:03 pm
by Schurkey
Sorry. Methanol as a fuel never occurs to me. They sold M-05 (methanol-based "Gasohol") here for six months or so before changing to E-10; back around 1980--'81. I've never had a methanol-fueled race car.

Re: tall deck and intake spacer plates

Posted: Fri Oct 11, 2019 7:27 pm
by Kurshuk
Schurkey wrote:
Fri Oct 11, 2019 3:03 pm
Sorry. Methanol as a fuel never occurs to me. They sold M-05 (methanol-based "Gasohol") here for six months or so before changing to E-10; back around 1980--'81. I've never had a methanol-fueled race car.
Since moving to methanol I will never move back! :)