August 25, 200520 yr IS there a way to clean the EGR valve? And how? Gotta take it out to do it? Thanks.
August 25, 200520 yr Book says to rap it with a soft mallet to knock particulate loose from the valve seat area. I've used small wire brushes, wire and compressed air to clean the passages.
August 25, 200520 yr Water will probably not get off the hard carbon deposits. I think some manual cleaning will be needed.
August 25, 200520 yr Also look at the ports in the engine from which gas comes to the valve and goes back to the combustion chamber when the valve is open. On my GL when I bought it, turned out that both ports were packed solid with carbon. It took 2 mechanics a good while to clean the engine out with solvent and elbow grease. Apparently this may have happened because the PCV valve tube was crimped shut for a year. From my growing list titled: Things I wish I'd known _before_ buying the first Subaru.
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