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Cleaning aluminum plenum on C4 88

tls630

Well-known member
Joined
Feb 24, 2004
Messages
354
Location
Cape coral Fl.
Corvette
69 roadster 88roadster
Does anyone have a secret? I have tried brake clean, wheel cleaner, some differant aluminum cleaners, and simple green and stiff brushes. It still doesn't look very good. What do you suggest?? tls
 

bossvette

Gone but not forgotten
Joined
May 19, 2003
Messages
3,233
Location
West Unity Ohio
Corvette
1968 1997
off the car glass beads work great, on the car I would not know. Back in my Motorcycling days I used a product called S-100 available at your local Harley dealer spray on rinse off worked great on the bike.
 

gmjunkie

Well-known member
Joined
Nov 11, 2004
Messages
4,520
Location
Old Fort NC/Vero Beach FL
Corvette
03 Z-51,78 L82 Coupe
off the car glass beads work great, on the car I would not know. Back in my Motorcycling days I used a product called S-100 available at your local Harley dealer spray on rinse off worked great on the bike.
Yeah,Me too,But I got mine at the Kawasaki Dealer!;) The Only personnel vehicle I ever had that wasn't "American Iron" but I guess it was assembled here!! Anyway I've used a weak solution of Muriatic acid,But you have to be real careful and not get it in wiring or on paint!!! And you need to neutralize it with Baking soda water and rinse good!!!!:upthumbs :D Oops, I must have forgot about the 37 MG TD with a Judson Supercharger!!:D
 

karagoz

Member
Joined
Dec 17, 2006
Messages
14
Location
Detroit
Corvette
1988 Red Coupe
Oxidation

Does anyone have a secret? I have tried brake clean, wheel cleaner, some differant aluminum cleaners, and simple green and stiff brushes. It still doesn't look very good. What do you suggest?? tls
Oxidation of the aluminum causes intake runners and other aluminum parts to get dull and discolored. There are aluminum brighteners you can buy that may help, but the results could be spotty and make things look worse. By the way, don't try to clean or scrub your valve covers - they are powder coated magnesium.
 

tls630

Well-known member
Joined
Feb 24, 2004
Messages
354
Location
Cape coral Fl.
Corvette
69 roadster 88roadster
I worked on the plenum yesterday using elbow grease and wd-40.. it worked better than anything I have tried yet!! I also put a liberal amount of it on the valve covers.. They look nice, except I have a couple small stains.. Any more suggestions?
 

vetteboy86

Well-known member
Joined
May 26, 2003
Messages
2,760
Location
IN
Corvette
1986 Black "Indy 500 Pace car replica"
You will probably have to repaint those valve covers :(
 

tls630

Well-known member
Joined
Feb 24, 2004
Messages
354
Location
Cape coral Fl.
Corvette
69 roadster 88roadster
Paint will not work.. they are powder coated magnesium.. I had some junk ones that I bead blasted and bought the valve cover paint from Ecklers. The paint was nothing more than an aluminum paint and they looked worse when I got done than they did before..
 

vetteboy86

Well-known member
Joined
May 26, 2003
Messages
2,760
Location
IN
Corvette
1986 Black "Indy 500 Pace car replica"
Thats strange because there are several accounts here on the forums of people using valve cover paint and had good results. I am wondering if anyone has painted the magnesium valve covers??
 

tls630

Well-known member
Joined
Feb 24, 2004
Messages
354
Location
Cape coral Fl.
Corvette
69 roadster 88roadster
T he paint that I got from Ecklers was Spruce brand.I still have the can and will give you the part # if you wish. I paid 7-8 bucks for it and like I said it is nothing more than silver paint. It does not match in color or texture. Not even close. If someone has a brand that works let me know..
 
M

Mart

Guest
I removed mine and painted with this stuff, if you put lots on and spray the final coat from about 12 - 16 inches away it wil gine you that rough stock look and feel

 

karagoz

Member
Joined
Dec 17, 2006
Messages
14
Location
Detroit
Corvette
1988 Red Coupe
vallve covers

Thats strange because there are several accounts here on the forums of people using valve cover paint and had good results. I am wondering if anyone has painted the magnesium valve covers??
I painted mine with paint purchased from Mid America -- with good results.

I didn't spray the paint on - I sprayed it into a small container and then used a small brush and q-tips to apply the paint to the valve covers. In my case only the tops of the valve covers were discolored so I didn't have to remove them from the engine to paint them. If you do want to take off the valve covers, the one on the driver's side is no problem but the one on the passenger side is blocked by the A/C compressor. Also you may not want to remove the valve cover in any case because you might end up with an oil leak when you put the valve cover back on. If you don't have a leak now, why ask for trouble??

All my attempts to "clean" the valve covers only made things worse. I even tried toothpaste! Either re-paint them or buy new one$.
 

Edmond

Well-known member
Joined
Aug 1, 2001
Messages
5,218
Location
Louisiana
Corvette
2003 Z06
Um, did anyone else notice that the Junk posted a pic of himself wearing boxers? :L
 

RV Guy

Well-known member
Joined
Aug 16, 2003
Messages
190
Location
Nampa, ID
Corvette
1986 Silver/Gray Coupe
I worked on the plenum yesterday using elbow grease and wd-40.. it worked better than anything I have tried yet!! I also put a liberal amount of it on the valve covers.. They look nice, except I have a couple small stains.. Any more suggestions?

What's with the WD40? Does it act as a cleaner?

Thanks
 
M

Mart

Guest
For theplenum I used Etching Mag wheen cleaner, spray it on let it foam for a few minutes and rinse.
 
T

tdr1919

Guest
Paint will not work.. they are powder coated magnesium.. I had some junk ones that I bead blasted and bought the valve cover paint from Ecklers. The paint was nothing more than an aluminum paint and they looked worse when I got done than they did before..

Yeah, I bought black (don't ask me why I painted them black) rinkle coat valve cover paint & primer from my local autoparts. I removed the covers, stripped them, prepped them meticulously, and painted with the valve cover paint, about10 months later they started to blister, look like hell again. What about stripping and powder coating ? will that look stock and stay in good shape?
- Tom
 
T

tdr1919

Guest
I painted mine with paint purchased from Mid America -- with good results.

I didn't spray the paint on - I sprayed it into a small container and then used a small brush and q-tips to apply the paint to the valve covers. In my case only the tops of the valve covers were discolored so I didn't have to remove them from the engine to paint them. If you do want to take off the valve covers, the one on the driver's side is no problem but the one on the passenger side is blocked by the A/C compressor. Also you may not want to remove the valve cover in any case because you might end up with an oil leak when you put the valve cover back on. If you don't have a leak now, why ask for trouble??

All my attempts to "clean" the valve covers only made things worse. I even tried toothpaste! Either re-paint them or buy new one$.

Removing them is a real pain, it gives you good access to clean those hard to reach spots. if you use the better gasket you will not have issues with oil leaking
 

tls630

Well-known member
Joined
Feb 24, 2004
Messages
354
Location
Cape coral Fl.
Corvette
69 roadster 88roadster
They were powder coated from the factory. i don't know of anyone that offer an exchange but that would be the way to go..
 

tls630

Well-known member
Joined
Feb 24, 2004
Messages
354
Location
Cape coral Fl.
Corvette
69 roadster 88roadster
What brands of wheel cleaners are etching?? I tried armor all brand and it did nothing at all.. The w-d seemed to clean quite well not as well as I wouild like though...
 
T

tdr1919

Guest
What's with the WD40? Does it act as a cleaner?

Thanks

If you spray wd40 liberally, and use a brush or rag it will clean almost everything,
even the aluminum tubing for the A/C. then give it a spray and let it dry for a nice shine.
-Tom
 

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