Intake gasket replacement
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Joined: Sep 2007
Posts: 96
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From: Catonsville Maryland
Intake gasket replacement
Just completed my intake gasket on my 92 lt1. Truth be told my neighbor a full time mechanic did most of the work. While I was out getting a correct fitting valve cover gasket, he reinstalled the intake assembly. He did not bother to put rtv sealant under the intake gasket water ports as suggested in many of the threads. We used the right stuff on the china walls...Noting the original intake gasket lasted over 15 years and appeared to have no sealant, should I be concerned.? I left the service manual open, but some guys just know it all.... Just wondering ...Thanks Jim
Racer
Joined: Oct 2008
Posts: 250
Likes: 5
From: Winchester VA
Just completed my intake gasket on my 92 lt1. Truth be told my neighbor a full time mechanic did most of the work. While I was out getting a correct fitting valve cover gasket, he reinstalled the intake assembly. He did not bother to put rtv sealant under the intake gasket water ports as suggested in many of the threads. We used the right stuff on the china walls...Noting the original intake gasket lasted over 15 years and appeared to have no sealant, should I be concerned.? I left the service manual open, but some guys just know it all.... Just wondering ...Thanks Jim
RTV - I have been told the trick to RTV is letting it cure for a long time before starting engine. We use it a lot at work for non-engine applications and find that curing is important part of your RTV being successful.
Le Mans Master
Joined: Aug 2004
Posts: 5,141
Likes: 7
From: Metairie Louisiana
I just did my 95 also, twice. The first time I didnt put enough at the rear and it leaked. I pulled the intake again Sunday and reinstalled it. This time I made sure to get enough around the oil pressure sensor in the back. It looks like it's good now. I used the Right Stuff and only put it at the front and back of the intake and a little up the china walls. I used dry Felpro gaskets on the intake ports. That's all the FSM called for if I remember correctly. They suggested a GM sealer product. It was at the dealership a few years ago for a blown head gasket. When I pulled the intake off recently it looked like they used the exact procedure I did but with GM gaskets and sealer.
