Throttle body plate
Thread Starter
Instructor
Joined: Jan 2012
Posts: 108
Likes: 5
From: Lawrenceville NJ
Throttle body plate
I decided to get a custom plate/cover for the throttle body on my 1994 LT1. I removed the old cover and the gasket and underneath in the throttle body looked like it was soaked in oil? Is this ok? Should I clean this out before putting on the new plate? Does this indicate a problem? The car ran fine. Also, I got a new gasket with the new plate. It is hollow inside while the other one was solid. Is this ok? Thanks for any advice.
Old Gasket
Top of Throttle under Gasket and Plate
New Gasket
Old Gasket
Top of Throttle under Gasket and Plate
New Gasket
Racer
Joined: Dec 2006
Posts: 499
Likes: 27
From: shapleigh maine
As part of maintenance, clean your throttle body. Your best bet is to remove it and throughly clean it. You will need a new TB gasket. Also clean your IAC valve while the TB is off. The new gasket for your plate will work fine.
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
IMO just clean the throttle body you'll be fine.
Coolant passages are in the bottom... Tube from valve cover to Throttle body in the top.... NO DRAMA...
Coolant passages are in the bottom... Tube from valve cover to Throttle body in the top.... NO DRAMA...
Last edited by aboatguy; Mar 26, 2013 at 09:13 PM.
Instructor
Joined: Jan 2004
Posts: 169
Likes: 4
From: I celebrate their entire catalog
My 95 gasket looked just like yours when I took mine apart. Oil logged and saggy. I sealed it up with "make a gasket" sealant and I know I did a good job, but it never ran perfect. Once I replaced the gasket with the solid, factory type, it ran perfect.
Your 94 calls for the solid gasket when I look it up on rockauto and see the pics. I think you should get what the factory calls for. $10 gets you the top and bottom gaskets and another 5 dollars gets you the TB to intake gasket, if you take it off and clean it.
Your 94 calls for the solid gasket when I look it up on rockauto and see the pics. I think you should get what the factory calls for. $10 gets you the top and bottom gaskets and another 5 dollars gets you the TB to intake gasket, if you take it off and clean it.
Thread Starter
Instructor
Joined: Jan 2012
Posts: 108
Likes: 5
From: Lawrenceville NJ
Well, I finished my cleaning of the throttle body. It was filthy. With 133k on the odometer, I think it was never cleaned. While I was at it, I replaced the IAC. Did the reset procedure for the IAC and the car seems to be idling ok so far, I only ran it for like 30 seconds. I did use the gasket pictured above, I hope it'll be fine.
The Old IAC.
The New Plate in Place, I broke the rubber collar that holds on the breather tube to the throttle body. I will have to go buy some rubber tubing to replace it.
The Old IAC.
The New Plate in Place, I broke the rubber collar that holds on the breather tube to the throttle body. I will have to go buy some rubber tubing to replace it.
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Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
The air supply for the PCV system goes through the top of the throttle body. That's why the gasket is there.
That area should only have clean air from the air filter going through there. If it is full of oil you might have a problem with your PCV valve or lots of blow-by. Maybe you have a K&N type air filter that's over-oiled?
That area should only have clean air from the air filter going through there. If it is full of oil you might have a problem with your PCV valve or lots of blow-by. Maybe you have a K&N type air filter that's over-oiled?
Racer
Joined: Jan 2013
Posts: 415
Likes: 19
From: Mobile Alabama
I just experienced the same thing with my 95 LT1 as CNJ, soaked with oil. I'm going to clean it out and use the gasket that came with the new plate, hopefully won't have any problems. If I do have problems, I'll order a replacement OEM type gasket.
4th Gear
Joined: Feb 2017
Posts: 4
Likes: 0
The air supply for the PCV system goes through the top of the throttle body. That's why the gasket is there.
That area should only have clean air from the air filter going through there. If it is full of oil you might have a problem with your PCV valve or lots of blow-by. Maybe you have a K&N type air filter that's over-oiled?
That area should only have clean air from the air filter going through there. If it is full of oil you might have a problem with your PCV valve or lots of blow-by. Maybe you have a K&N type air filter that's over-oiled?
Team Owner
Joined: Jul 2004
Posts: 28,472
Likes: 3,290
From: Hartford WI
Why clean just the IAC? The passages also get gunked up. Might as well make a clean run of it and take it off, clean everything and replace gaskets. Sure, it might be a bit harder to take the IAC housing off but after a couple times you will learn to use anti-sieze and it will make life easier especially if you delete the coolant hose.