OK. You all inspired me. I just did this on mine yesterday along with replacing the leaking high-side Pressure Relief Valve ($5 at my local auto parts store) and recharging the system. Result - fairly dramatic improvement overall. I couldn't find any foaming cleaner at my auto parts stores so I just used some brake cleaner and a good spray with the garden hose (drains to the street btw).
Here's what I took out of mine. There's no way this has ever been cleaned. It really does look like 13 years worth of gunk. Yikes!
Here's what I took out of mine. There's no way this has ever been cleaned. It really does look like 13 years worth of gunk. Yikes!
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