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How to clean Plenum ?

jeepie

Well-known member
Joined
Feb 6, 2002
Messages
162
Location
Dunmore, Pa.
Corvette
1991 Coupe Blk/Blk
I need to clean my plenum before putting it back on, it is pretty dirty inside, How has everyone cleaned theirs ? I was thinking about bringing it to a machine shop and have it hot tanked is this a good idea, or will it ruin the finish or warp the plenum ? The small passages (egr ?) are also pretty carboned up what is the best way to clean them out ?
Thanks for the help.
 
The plenum is aluminum, while the vavle covers are magnesium. A reputable machine shop will know how to clean aluminum. The aftermarket (Mid America Motorworks, Paragon and others) sells paint similar to the paint used at the factory.
 
Honestly I just cleaned mine today!


All I used was a GOOD carb cleaner, and put a rag through it a few times.

(Mine was gross trust me)

I kind of filled the rear of the plenum covered the holes with my hands and shook the living day lights out of it then rinsed.

A few times and you can shave in it!
 
Thanks, I think I will give the carb cleaner a try.
 

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