Plenum Paint Bubbles - ZR-1 Net Registry Forums

902066 · 04-16-2010

I have a couple of paint bubbles on the top of my Plenum. I have had my Throttle Body coolant by-passed for a couple of years now. Going to have the plenum off next week for injector change, thought I might fix the bubbles while it's off. Whats the best way to fix them? I'm assuming sand and fill with what? and then repaint. thanks

billybaloneey · 04-17-2010

Visit the Lingenfelter web site...they sell a spray paint designed for the plenum and it is about as close to factory original as you'll find anywhere.

tomtom72 · 04-17-2010

When I cleaned up my bubbles the first thing I noticed under the paint was a white powdery deposit. I scraped off the paint then found the white stuff. I hit it with WD40 and a tooth brush. I cleaned up the mess and looked and there was still some white stuff in the pores of the metal. I then went to the brass brush and WD40. Then to 100 grit wet paper + WD40. Every time I dried the metal I still could see white stuff in the pores.

It's a pia to get all the white stuff. I probably should have used Navel Jelly? I eventually used baking soda and a stainless steel bristle brush. It took a while to get rid of all the white stuff in the metal pores.

902066 · 04-17-2010

Thanks Tom Tom , thats what I wanted to find out. Whats under the bubbles and how to get rid of it for good?

tomtom72 · 04-18-2010

Your welcome!

Since your coolant loop to the T/B is by-passed you should never have this issue again. I am convinced that the white stuff is the result of electrolysis. I used to see this all the time on aluminum in boats. Stray electrical currents and and water don't go well together. Same white stuff and same PIA to neutralize it.

FWIW, I did mine about five yrs ago and I have not had a return of the pox. I used the LPE paint. Good stuff. Key is to get rid of all the white stuff before painting.

Tom

phrogs · 04-18-2010

yeah that white stuff is the corrosion.

04-16-2010	#1
902066 Join Date: Jul 2005 Posts: 190	Plenum Paint Bubbles I have a couple of paint bubbles on the top of my Plenum. I have had my Throttle Body coolant by-passed for a couple of years now. Going to have the plenum off next week for injector change, thought I might fix the bubbles while it's off. Whats the best way to fix them? I'm assuming sand and fill with what? and then repaint. thanks

04-17-2010	#2
billybaloneey Join Date: May 2008 Location: Mauriceville, Texas Posts: 179	Re: Plenum Paint Bubbles Visit the Lingenfelter web site...they sell a spray paint designed for the plenum and it is about as close to factory original as you'll find anywhere.

04-17-2010	#3
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,609	Re: Plenum Paint Bubbles When I cleaned up my bubbles the first thing I noticed under the paint was a white powdery deposit. I scraped off the paint then found the white stuff. I hit it with WD40 and a tooth brush. I cleaned up the mess and looked and there was still some white stuff in the pores of the metal. I then went to the brass brush and WD40. Then to 100 grit wet paper + WD40. Every time I dried the metal I still could see white stuff in the pores. It's a pia to get all the white stuff. I probably should have used Navel Jelly? I eventually used baking soda and a stainless steel bristle brush. It took a while to get rid of all the white stuff in the metal pores. __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

04-17-2010	#4
902066 Join Date: Jul 2005 Posts: 190	Re: Plenum Paint Bubbles Thanks Tom Tom , thats what I wanted to find out. Whats under the bubbles and how to get rid of it for good?

04-18-2010	#5
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,609	Re: Plenum Paint Bubbles Your welcome! Since your coolant loop to the T/B is by-passed you should never have this issue again. I am convinced that the white stuff is the result of electrolysis. I used to see this all the time on aluminum in boats. Stray electrical currents and and water don't go well together. Same white stuff and same PIA to neutralize it. FWIW, I did mine about five yrs ago and I have not had a return of the pox. I used the LPE paint. Good stuff. Key is to get rid of all the white stuff before painting. Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

04-18-2010	#6
phrogs Join Date: Jul 2004 Location: Kalamazoo MI Posts: 1,755	Re: Plenum Paint Bubbles yeah that white stuff is the corrosion. __________________ JOHNNY P Currently own 90 ZR-1 #845 DRM 500 engine package 90 #226 Parts car Hit me up if you need anything.