Is there a product (other than a chisel) to break up or dissolve carbon built up inside intake port to EGR. '88 22re has a bit at egr and carb cleaner doesn't appear to be dissolving carbon. Also want to clean carbon I can't see inside port. Thanks in advance.

 

I've never found anything that will do it. Carbon is pretty darn resistant to any type of solvent. I stuck a bead blaster in mine to clean it out.

 

I soaked mine over night in a carb cleaner, then had to take a coat hanger and scrape all the gunk out. PITA!

 

Was thinking about metal bristle test tube type brush to get down into port that wasn't visible? The loosened carbon would then have to find it's was out the combustion chamber?

 

Remember the EGR has a rubber diaphram (SP) in it.....

I bought a gallon can of carb soak/ cleaner with a basket inside.
I proped up the EGR so rubber pieces would not be effected.
Other parts I soked in brake cleaner.
and the intake I used oven cleaner.

Have fun.

VR
Repo

 

Not sure if SeaFoam will do the trick. Do a search on that key word and you will see if it works for you or not.

 

how much are they to replace

 

Mineral spirits. Let it soak overnight (no rubber or plastic parts) and then clean out with a wire brush. If the passageway is completely plugged, I'd try to at least make a hole though the passageway with a wire first, then the soaking can do a much better job. Good luck.

 

Laundry bleach.