Leaking at intake ports.
Thread Starter
Joined: Jul 2000
Posts: 6,530
Likes: 94
From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Leaking at intake ports.
87 Monte w/ 305 4bbl...
I wasn't passing emissions because the original intake manifold had clogged EGR passages. I put on an Edelbrock 3706. I used Ultra black RTV around the front, back and water ports only. The gaskets were the papery steel core set the GM parts counter up the road provided.
I set the timing today and all is well but it's surging. I put a 5/32" rubber hose to my ear and picked up a healthy suckage over the 1/3 intake ports-to-head area. 5/7 is dead quiet there.
I didn't think the ports needed RTV, though maybe that would have masked the problem. How do I check the manifold for trueness when I pull it? I may be able to leave the stocker in my parts washer to see if I can get it unclogged and re-use it and return the Edel. to Jegs if it's bad.
I wasn't passing emissions because the original intake manifold had clogged EGR passages. I put on an Edelbrock 3706. I used Ultra black RTV around the front, back and water ports only. The gaskets were the papery steel core set the GM parts counter up the road provided.
I set the timing today and all is well but it's surging. I put a 5/32" rubber hose to my ear and picked up a healthy suckage over the 1/3 intake ports-to-head area. 5/7 is dead quiet there.
I didn't think the ports needed RTV, though maybe that would have masked the problem. How do I check the manifold for trueness when I pull it? I may be able to leave the stocker in my parts washer to see if I can get it unclogged and re-use it and return the Edel. to Jegs if it's bad.
Thread Starter
Joined: Jul 2000
Posts: 6,530
Likes: 94
From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: Leaking at intake ports.
I'm thinking Permantex MotoSeal® 1 #29132 as the equivalent semidrying liquid gasket.
ThreeBond 1194 is a semi-drying liquid gasket whose major component is special synthetic rubber. After it is applied and dried, it will form a rubber-like elastic body. Since it excels in padding property, it shows a high sealing effect on bonded surfaces that have poor flatness and large clearance. In addition, it has excellent resistance to water, oil and gasoline.
Permatex MotoSeal 1 is a gray solvent based semi-drying liquid gasket based on an elastomeric, synthetic rubber and designed for excellent gap filling properties. It is designed for use on motorcycles, personal watercrafts, snowmobiles and all- terrain vehicles. MotoSeal 1 resists high temperatures and performs well in a gasoline environment.
Supreme Member
Joined: Oct 2001
Posts: 8,113
Likes: 6
From: NWOhioToledoArea
Car: 86-FireBird
Engine: -MPFI
Transmission: T5
Axle/Gears: 3:42
Re: Leaking at intake ports.
http://www.z1enterprises.com/detail.aspx?ID=178
Last edited by Gumby; Feb 26, 2011 at 10:56 PM.
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