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Old 06-14-2023   #1
Jetjock
 
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Default Repainting Throttle Body Cover

While my Z slept for 10 months awaiting her transmission, the antifreeze in her motor ate through the gasket and did a number on the finish as shown. I sanded off the damage part of the throttle body and use a paint that I got from Lingenfelter. That fixed that but how do I match the paint on the rest of the plenum? That's the question at the moment.


Roy
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File Type: jpg Throttle Body Damage.jpg (84.2 KB, 63 views)
File Type: jpg Painted Throttle Body.jpg (71.3 KB, 72 views)
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Old 06-15-2023   #2
dredgeguy
 
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Default Re: Repainting Throttle Body Cover

Get rid of the paint issue, just start rubbing
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Old 06-16-2023   #3
Jetjock
 
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Default Re: Repainting Throttle Body Cover

Quote:
Originally Posted by dredgeguy View Post
Get rid of the paint issue, just start rubbing

I'm sorry but that makes no sense. Rubbing with what? Specifically, what are you talking about?


Roy
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Roy L. Carman

If I feel the need for speed,
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1989 Dk Blue Coupe lost in divorce
1991 Black Coupe SOLD
1992 Black ZR-1 #423 SOLD!
1993 Ruby Red 40th Anniversary ZR-1 #334
1995 Black ZR-1 taken by ex-wife
2002 Pewter Coupe no idea where it is
2003 50th Anniversary Corvette #No idea what number SOLD!
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Old 06-16-2023   #4
tccrab
 
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Default Re: Repainting Throttle Body Cover

If i were to guess, I'd say he meant to polish your LT5 like he showed in the pic.
Polished motors are pretty for sure, but I'd yuess it takes a ton of rubbng.

Crabs
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Old 06-16-2023   #5
AirbusDriver
 
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Default Re: Repainting Throttle Body Cover

Does anyone know, for sure, what product was used to paint the engines?
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Old 06-16-2023   #6
JThomas
 
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Default Re: Repainting Throttle Body Cover

The color may be hard to match, especially if you're considering NCRS. If not, I would have the plenum, cam covers, snorkel and throttle body powder coated and dress it up a bit, then it will all match.
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Old 06-17-2023   #7
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Default Re: Repainting Throttle Body Cover

Quote:
Originally Posted by JThomas View Post
The color may be hard to match, especially if you're considering NCRS. If not, I would have the plenum, cam covers, snorkel and throttle body powder coated and dress it up a bit, then it will all match.
I agree with Joe. Contact Marc Haibeck about it. --Bob
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File Type: jpg 95Engine (6).jpg (144.7 KB, 37 views)
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Old 06-17-2023   #8
Jetjock
 
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Default Re: Repainting Throttle Body Cover

Quote:
Originally Posted by JThomas View Post
The color may be hard to match, especially if you're considering NCRS. If not, I would have the plenum, cam covers, snorkel and throttle body powder coated and dress it up a bit, then it will all match.

Joe, not doing NCRS, I just want the throttle body to match up with the rest of the plenum. The color on the is the original color for that year as it was stored and then put in the body. It looks like a different color than my 92 was. Another thing is that Marc said don't powder coat the engine as it can warp the cam covers. He said to paint it.


Roy
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Roy L. Carman

If I feel the need for speed,
I just think about flying the B-777.



1989 Dk Blue Coupe lost in divorce
1991 Black Coupe SOLD
1992 Black ZR-1 #423 SOLD!
1993 Ruby Red 40th Anniversary ZR-1 #334
1995 Black ZR-1 taken by ex-wife
2002 Pewter Coupe no idea where it is
2003 50th Anniversary Corvette #No idea what number SOLD!
ZR-1 Net Registry #516
Grand Sport Lifetime Member
NCM Lifetime #1468
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Old 06-18-2023   #9
WARP TEN
 
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Default Re: Repainting Throttle Body Cover

Quote:
Originally Posted by Jetjock View Post
Joe, not doing NCRS, I just want the throttle body to match up with the rest of the plenum. The color on the is the original color for that year as it was stored and then put in the body. It looks like a different color than my 92 was. Another thing is that Marc said don't powder coat the engine as it can warp the cam covers. He said to paint it.


Roy
I agree with Marc--paint it. He has been doing that for years with great results. Did you ask him about a paint to match a stock plenum? He should know about that. For touch ups I think he uses a paint he gets from Summit Racing, but can't remember exactly what it was. --Bob
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--Sold but still running strong
1993 Quasar Blue #161 "HIL KING"
--Sold but still running strong, now with more than 120,000 miles
1967 Marlboro Maroon/Saddle Corvette Coupe 300 hp/4-spd
--Sold a long time ago
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Old 06-27-2023   #10
Meanmyz
 
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Default Re: Repainting Throttle Body Cover

I thought I would relay my own experience with this. I too, repainted my plenum cover with the Lingenfelter paint. Trying to do it correctly, I removed all traces of old gasket material and cleaned up coolant residue under the cover. I recut and used my own bulk gasket material of the same thickness. Inside two years, the paint lifted again.

THIS Time, after cleaning everything up and repainting, I used permatex (orange, I think) to coat my cut gasket material and then let it dry. I reassembled. That was 20 years ago and I haven't had a problem since with electrolysis, or whatever causes the lifting. And yes, this on a car, that still runs the coolant through the throttle body.

As far as "match", for the fact that it was the Lingenfelter paint and somewhat close (but not perfect), I decided to leave it alone as is.

Case in point, I seem to think that coating the material helped against electrolysis. I did not paint the underside of the cover (not that anyone would), but I think that is important too...not to give avenues for the electrolysis to travel if it gets under any paint and just continues on... I only painted the top and sides of the cover (masked off bottom).

Hope my post makes sense and provides some degree of insight to someone. -Meanmyz.
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