gasket material

[T77911S]

i have the intake back off.....again. now i have the intake at the machine shop having material added to the sides of the intake flanges. i assume the way the intake is made it is cast, then the ports are drilled along with the stud holes. it looks like the port holes where drilled just a little off center so the one side of the ports have very narrow edges, add in the too narrow too wide factory gaskets and there is just not much there to seal the intake.

so i am thinking of making my own gaskets that will be much wider, just not sure what material to use. any ideas?

[JFairman]

This may help... Heat Insulators
The gaskets are thicker than VR ones and the plastic heat insulator blocks fit CIS perfectly. Just order the ones with 40mm holes.

The 12 stainless steel studs included work perfect as exhaust manifold studs and they will never rust.
I'm using all this stuff in mine and it works great. This PMO kit was about $50 when I bought it around 7 years ago.

[Robbbyg]

I almost don't want to reply to offer another good opinion out of fear of getting ragged by couple of Jealous guys (of my car) here but here goes

Have you tried copper silicone?
I use it for high pressure and semi high heat applications, and I see on reason it wouldn't work on any part of the manifold,

Called 922RTV made by Bostik and $6 a tube, its handy as you can use it for multiple areas and don't need to find out you need some when a gasket breaks, this stuff obviously forms any shape , just wipe it on with your finger, make the bead continuous and your done.

I copied the details of it below.
I see no reason why it can not be used for your needs, even though many here will argue the point because it doesn't say it was made for a Porsche.

This stuff is new technology, its reliable and will never let you down,
MY car has done quarter of a million kays a daily driver I trust it.
DETAILS

Features Single component, acetic cure, high strength, industrial grade silicone sealant Makes formed-in-place gaskets for gearboxes, compressors and pumps, heavy industrial pipes and flanges Applications Suitable for industrial, mining and automotive maintenance, and for sealing joints in sheet metal stacks and duct work Ideal for sealing gaskets in heating and refrigeration units,

[Ronnie's.930]

Originally Posted by Robbbyg

I almost don't want to reply to offer another good opinion out of fear of getting ragged by couple of Jealous guys (of my car) here but here goes

The "Robby sized", every component sealer!

[dos531]

Sealer is a shortcut for sloppy mechanics. You should be able to order gasket paper and cut it to any shape you like.
Gasket Material | AutoZone.com

[dmg_dirtsquirt]

As long as the unit doesn't see much heat I would use Toyota FIPG with the original gasket, trimmed to fit the port. You don't need a whole lot of surface area for sealing

[T77911S]

i have used this volvo sealant, which i think is actually loctite 574. man, that stuff WELDED the gaskets on. tough to clean off. i have also used a silicon that BMW/mercedes use called 5970.

both were applied with a very very thin coating.

i have the aluminum IJ blocks with the insulators. i set one of the blocks on the head and i am not sure if the head flange is perfectly flat. the IJ block would rock just a little. when i put a straight edge on it, it seems fine. i am not sure if it is "me" that is making it rock or not, but when i had it on one edge, i could slide a .005 gauge under the other side.
this was one of the ports that seemed to make it run bad when i poured water on it.

the gasket material from advance says "rubber+fiber". it is not quite as thick as the factory gaskets.

[JFairman]

If you could slide a .005" feeler gauge in there I doubt the thin VR gaskets would seal. They don't squish down much.
I took come pics of the PMO intake gaskets and heat insulators I mentioned above before I installed them. You can see they are a lot thicker than the VR gaskets and they do squish down a little when tightening the intake manifold nuts to 18 ft lbs.
I wouldn't use 574. It's expensive and difficult to clean off.

Hondabond is newer technology and much better. It comes in a tube and cost 1/5 of what 574 does. I used it on the cam towers to seal them to the heads and on the chain case to engine case surface with no gaskets (because my heads were milled down about .017" and the chain cases were not) and they are not leaking any oil.

You can buy a big tube of it at your local Honda dealer parts counter for about $7 and you can clean it off with lacquer thinner even after it dries.
You can also get the same stuff from Yamaha dealers and they call it Yamabond. It's made by Threebond.
Installing these gaskets with regular grease works good too and they are easy to remove without sticking if you ever need to do that.

Pics of the thicker PMO intake gaskets with some VR ones to show the difference.



anyway, hope that helps.

[16Volt]

Hondabond is used by allot of Audi shops, great stuff.

[Tippy]

Blue Fel Pro.