LT1-LT4 Modifications 1993-97 Gen II Small Block V8

LT1 throttle body plate/gasket question

Old 07-05-2013, 06:19 PM
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Default LT1 throttle body plate/gasket question

i'm thinking about buying one of those ebay "Trans Am" throttle body plates for my car and was wondering if it is mandatory to change the gasket or if you can just pull the old TB plate off and put the new one on and leave the existing gasket in place?
Old 07-05-2013, 07:22 PM
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Depends on what the condition the gasket is, then again why can't you spend a couple bucks for a new one?
Old 07-05-2013, 08:52 PM
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I can but the one i was looking at doesnt come with one and the gasket is $8 on ebay so i'd rather not spend that much on a gasket if i don't have to. The plate itself is only $20 so $8 for a damn gasket seems steep.
Old 07-06-2013, 07:13 AM
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the ones on ebay should come with new gasket hardware and the plate for 25.00
Old 07-06-2013, 07:15 AM
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well atleast my slp one did
Old 07-06-2013, 04:06 PM
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the SLP ones do, but the one i'm interested in does not. it does come with new screws though.

http://www.ebay.com/itm/TPI-Throttle-Body-Plate-Pontiac-Firebird-Trans-am-WS6-/150807652192?pt=Motors_Car_Truck_Parts_Accessories&hash=item231cd62760&vxp=mtr
Old 07-07-2013, 11:32 AM
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just use ur gasket
Old 07-07-2013, 12:00 PM
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That gasket often swells and gets rather difficult to reuse. If you look at the stocker it is likely all wavy on the edges where it hangs out, that is from swelling.

I am not a blind "replace all gaskets" believer. I have never bought LT1 valvecover gaskets, and I have reused oilpan gaskets, and I have used o-rings from the 9004 headlight bulbs(b-body) for new o-rings on the oil fill tube.

The TB topplate gaskets don't lend themselves to it though.
Old 07-07-2013, 03:01 PM
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i just used a thin bead of the right stuff..
Old 07-08-2013, 04:13 PM
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Well i ordered the cover and decided to take the old one off to inspect the gasket. i think i can reuse it just fine. i had to stretch a few of the holes back into place from where this pic shows it, and i ended up losing one of the damn screws somewhere down in the engine bay and it didn't fall out. i put the plate back on sans that lost screw and the car is running fine so i'm just gonna get the new plate and use it and not bother replacing the gasket. good thing the new plate comes with new screws lol.

Old 07-08-2013, 08:16 PM
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lol. thats what mine looked like i threw it out and used a small amount of black rtv.So it didn't come out the sides
Old 07-10-2013, 02:01 AM
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^^^ rtv cleans it up. that gasket pops out all crinkled and stuff under the plate. i trust the right stuff on lots of stuff.
Old 07-10-2013, 04:15 AM
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That's what mine looked like, I tried stretching it but just bought a new one on rockauto.
Old 07-11-2013, 12:14 PM
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it's installed! the gasket was pretty bent out of shape when i took it off the second time. since it appears the ebay gaskets are pretty thin and there is no cover for the inner part anyway like there was with the stock gasket, i went ahead and installed it without a gasket. the plate seems to sit flush enough. i started the car and it ran fine.

i once failed an emissions test with an SES light and slightly rough idle for an air leak coming into the bottom of the intake elbow after the MAF before i switched over to ram air. i would assume if i had an air leak from the top of the TB from that plate, the same thing would occur and it's not throwing any SES codes or idling rough.


Last edited by 1995blacktattop; 07-11-2013 at 12:44 PM.


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