Inlet manifold gaskets

subgiraffe · Post by **subgiraffe** » Tue Sep 05, 2006 12:36 am

I have had them go on my ea81 wagon several times. Just bought a brumby at the weekend with a suspected head gasket blown - turned out to be the inlet manifold gasket practically non-existent between the water-jacket and air inlet against the heads.

Can you get some decent gaskets - I have always used paper with high-temp silicon, even the gaskets I got with a re-grind kit were just paper. Surely there must be some composite gaskets made for these?

Has anyone else had much trouble??

subanator · Post by **subanator** » Tue Sep 05, 2006 12:44 am

subgiraffe wrote:I have had them go on my ea81 wagon several times. Just bought a brumby at the weekend with a suspected head gasket blown - turned out to be the inlet manifold gasket practically non-existent between the water-jacket and air inlet against the heads.

Can you get some decent gaskets - I have always used paper with high-temp silicon, even the gaskets I got with a re-grind kit were just paper. Surely there must be some composite gaskets made for these?

Has anyone else had much trouble??

I had trouble with the bolts through the manifold into the head being stripped, luckily there was enough depth in the thread to take a longer bolt, but are known to cause a few probs in this area. Yes a decent gasket goo like the blue shit seals anything. Why dont you cut some out of plasiticised sheet gasket and goo them in?

waggaclint · Post by **waggaclint** » Tue Sep 05, 2006 8:06 pm

yeah the best way would be to make your own out of thicker gasket paper...

steptoe · Post by **steptoe** » Tue Sep 05, 2006 8:52 pm

Me, I use genuine Subaru gaskets here with aviation gasket goo

Suby Wan Kenobi · Post by **Suby Wan Kenobi** » Tue Sep 05, 2006 8:59 pm

As the manifolds get older the mating surfaces become worn out and generally require a machine or thicker gasket material, i have made gaskets from a thick card gasket paper when this happens and with some Permatex aviation sealer it seems to do the trick. If you have bolts with a fair bit of corrosiono on them it may also pay to clean the bolt holes out and run a tap down them the clean the threads up so you know you are getting all the clamping force out of each bolt.

SuBaRiNo · Post by **SuBaRiNo** » Tue Sep 05, 2006 9:25 pm

I never have much luck with gaskets myself... I swear by some good quallity gasket goo. Tim knows the best ones for each job.

I used to have problems with them gaskets back in the day but after i used to goo em they never became a problem again. Be carfull u don't do the bolts up too tight... i have snapped a few of them manifold bolts and its not fun at all.

Dave

tim_81coupe · Post by **tim_81coupe** » Tue Sep 05, 2006 11:57 pm

I beleive ACL do some nice thick gaskets brand new. Failing that, Suby Wan is on the ball there with the aviation sealant, the one you'll most likely want is known as Aviation Sealant #3. Carries the Loctite brand name now though (Permatex was bought out by Loctite).

Loctite Blue Maxx might do the trick too.

subgiraffe · Post by **subgiraffe** » Wed Sep 06, 2006 10:39 pm

are the ACL ones metal composite (like a head gasket)? - I thought that might be the way to go.

Gooed them up with some red hi-temp silicon (loctite) either side of some gasket card, should keep me out of trouble for a while, but wouldn't mind having a back-up for when/if they go again.

SuBaRiNo · Post by **SuBaRiNo** » Thu Sep 07, 2006 12:39 am

I think u would have to be extreamily unlucky for them to go again. I remember the old standard gaskets that used to go in there... felt more like solid bits of plastic about 3mm thick.

Dave

tim_81coupe · Post by **tim_81coupe** » Thu Sep 07, 2006 1:07 am

The red stuff is really for exhausts, I don't know how well it will cure with the relatively low operating temperature of the intake manifold. Just a point of caution too - keep the red stuff away from EFI cars! It can foul up O2 sensors...

I can't actually remember if the ACL ones are metal composite, I'd lean towards yes from what I saw in the packet, however I'm not 100%. It was about 2 years ago I saw them.

Dave's probably on the ball there with the standard gaskets, they could well have been plastic. V6 Buick boat anchors (read Commodore VN-VY V6) have plastic intake gaskets with a silicone bead around the face on each side.

BRUMBERTY · Post by **BRUMBERTY** » Thu Sep 07, 2006 9:18 am

SuBaRiNo wrote:I think u would have to be extreamily unlucky for them to go again. I remember the old standard gaskets that used to go in there... felt more like solid bits of plastic about 3mm thick.

Dave

Dave is right, the EJ ones are hard plastic and I read you are not supposed to use any seealant on them?? Hmmm

steptoe · Post by **steptoe** » Fri Sep 08, 2006 6:18 pm

inlet man gaskets for EA81 subie part number 14035AA150

justincase41 · Post by **justincase41** » Fri Oct 23, 2009 5:53 pm

Thread Revive.

Just bought 2 Genuine Inlet manifold gaskets ea81 for $21.05. They are very chunky and have the metal reinforcing material