Intake Manifold Gasket
Thread Starter
Intermediate
Joined: Mar 2005
Posts: 31
Likes: 0
From: Chino Hills CA
Intake Manifold Gasket
I am planning on doing the intake manifold gasket on my 86 and was wondering if anyone had any advice or tips for me and if there is anything else i should do at the same time scince it is all going to be apart. any particular gasket i should use to replace it with?
thanks for your help
oh ya...and i finally got my first wave, it was the highlight of my day.
thanks for your help
oh ya...and i finally got my first wave, it was the highlight of my day.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Originally Posted by texan0218
I am planning on doing the intake manifold gasket on my 86 and was wondering if anyone had any advice or tips for me and if there is anything else i should do at the same time scince it is all going to be apart. any particular gasket i should use to replace it with?
thanks for your help
oh ya...and i finally got my first wave, it was the highlight of my day.
thanks for your help
oh ya...and i finally got my first wave, it was the highlight of my day.
There are a few tricks I follow to make sure I don't end up with a leak. I've written them in a doc file that I can send you if you'd like.
Jake
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
Originally Posted by JAKE
I've got an 86 too and in the several times I've had my intake off, I've gone back with Mr. Gasket Ultra Seals intake gaskets; about $10.00
There are a few tricks I follow to make sure I don't end up with a leak. I've written them in a doc file that I can send you if you'd like.
Jake
There are a few tricks I follow to make sure I don't end up with a leak. I've written them in a doc file that I can send you if you'd like.
Jake
JAKE- have you had any problems with Felpro gasket set? That's what I used .
thanx-Mike
Racer
Joined: Feb 2005
Posts: 398
Likes: 1
From: Kelowna BC
Originally Posted by JAKE
I've got an 86 too and in the several times I've had my intake off, I've gone back with Mr. Gasket Ultra Seals intake gaskets; about $10.00
There are a few tricks I follow to make sure I don't end up with a leak. I've written them in a doc file that I can send you if you'd like.
Jake
There are a few tricks I follow to make sure I don't end up with a leak. I've written them in a doc file that I can send you if you'd like.
Jake
Could you send me a copy? I may be doing that in the next while also, so any tip would help.
Mike,
I have seen some intake after they were polished and they look great if you like that look. I think I may do that.
Fred
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Originally Posted by MikeC4
JAKE- have you had any problems with Felpro gasket set? That's what I used .
thanx-Mike
thanx-Mike
I don't take chances any longer though, and sensor-safe silicone both sides of the gaskets around the intake ports and the water ports to prevent any chance of leakage. Even though they have silicone beads already on the gaskets, I add another thin layer.
I've become **** about leaks after having to repair so many over the years. If I get a leak now, it's because I was drunk when I put 'em on; and I don't drink. LOL
Jake
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Originally Posted by 86C4EVER
Jake,
Could you send me a copy? I may be doing that in the next while also, so any tip would help.
Mike,
I have seen some intake after they were polished and they look great if you like that look. I think I may do that.
Fred
Could you send me a copy? I may be doing that in the next while also, so any tip would help.
Mike,
I have seen some intake after they were polished and they look great if you like that look. I think I may do that.
Fred
Jake
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
My tricks when doing an L98 intake:
1) Use a drill or Dremel and score the block and intake at the ends. This will give the RTV something to grab onto.
2) Spray the intake gaskets with Copper Gasket Sealer. A coat or two on each side will do the trick.
3) Use Copper RTV. It has a high heat rating and doesn't get hard as some others. It's also designed to deal with oils.
4) Don't start the car until the next day. The RTV needs 24 hours to properly set up.
Good luck!
1) Use a drill or Dremel and score the block and intake at the ends. This will give the RTV something to grab onto.
2) Spray the intake gaskets with Copper Gasket Sealer. A coat or two on each side will do the trick.
3) Use Copper RTV. It has a high heat rating and doesn't get hard as some others. It's also designed to deal with oils.
4) Don't start the car until the next day. The RTV needs 24 hours to properly set up.
Good luck!
Drifting
Joined: Oct 2003
Posts: 1,594
Likes: 0
From: CALGARY ab
Originally Posted by bogus
My tricks when doing an L98 intake:
1) Use a drill or Dremel and score the block and intake at the ends. This will give the RTV something to grab onto.
2) Spray the intake gaskets with Copper Gasket Sealer. A coat or two on each side will do the trick.
3) Use Copper RTV. It has a high heat rating and doesn't get hard as some others. It's also designed to deal with oils.
4) Don't start the car until the next day. The RTV needs 24 hours to properly set up.
Good luck!
1) Use a drill or Dremel and score the block and intake at the ends. This will give the RTV something to grab onto.
2) Spray the intake gaskets with Copper Gasket Sealer. A coat or two on each side will do the trick.
3) Use Copper RTV. It has a high heat rating and doesn't get hard as some others. It's also designed to deal with oils.
4) Don't start the car until the next day. The RTV needs 24 hours to properly set up.
Good luck!
with both JAKE & Bogus,you could also use a metal stamp where the RV sealant is to used. do both block and intake manifold.. it helps to seal by giving the sealant something to grab onto..
ther are two types of gaskets felpro 1204, with no restriction on rear coolants passages. the other is stock with restriction. felpro 93318. either can be used.. i used the 1204's for more flow of coolant and more even temperature as result..
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Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Originally Posted by cmashark
any reason why you wouldn't block off the rear coolant cross-over? i have a couple of old holley contender manifolds for sbc that don't even have the cross-over.
chris
chris
I chose to leave it installed although some of my buddies opted to remove there's. I figured there had to be a reason for it, other than getting in the way when I try to loosen the distributor hold down bolt.
I've seen posts about two types of intake gaskets, one with the rear coolant opening closed off or restricted and the other with it fully open. I chose the fully opened ones for no particular reason. The hose DOES get very hot though, so something's going on inside it.
I can't specifically recall, but I don't think there is a coolant cross-over passage at the rear of the stock intake on the 86. But who knows; GM loves to change things like that, I believe just to keep us confused. LOL
To block it off or leave it open is probably another one of those "year specific" things.
Jake
Last edited by JAKE; Apr 13, 2005 at 10:06 PM.
Drifting
Joined: Oct 2003
Posts: 1,594
Likes: 0
From: CALGARY ab
Originally Posted by JAKE
My 86 has a coolant hose that runs from the passenger side rear of the intake to what I believe is one of the heater hoses. I think it's a coolant vent hose, but I never took the time to find out exactly what it's for.
I chose to leave it installed although some of my buddies opted to remove there's. I figured there had to be a reason for it, other than getting in the way when I try to loosen the distributor hold down bolt.
I've seen posts about two types of intake gaskets, one with the rear coolant opening closed off or restricted and the other with it fully open. I chose the fully opened ones for no particular reason. The hose DOES get very hot though, so something's going on inside it.I can't specifically recall, but I don't think there is a coolant cross-over passage at the rear of the stock intake on the 86. But who knows; GM loves to change things like that, I believe just to keep us confused. LOL
To block it off or leave it open is probably another one of those "year specific" things.
Jake
I chose to leave it installed although some of my buddies opted to remove there's. I figured there had to be a reason for it, other than getting in the way when I try to loosen the distributor hold down bolt.
I've seen posts about two types of intake gaskets, one with the rear coolant opening closed off or restricted and the other with it fully open. I chose the fully opened ones for no particular reason. The hose DOES get very hot though, so something's going on inside it.I can't specifically recall, but I don't think there is a coolant cross-over passage at the rear of the stock intake on the 86. But who knows; GM loves to change things like that, I believe just to keep us confused. LOL
To block it off or leave it open is probably another one of those "year specific" things.
Jake
when i had the intake off, on 87 & 89. i found that the rear coolant passage is full flow THROUGH the intake, i like jake used full flow gaskets. the small 1/4" from intake manifold to heater hose i installed a valve to experiment if there are any differnaces in it being there or not. it being there may help in remove the air from the system, but as for any difference so far , i have not noticed..
