How To Clean An Intercooler by bwrussell

Step 4: Clean

Set the intercooler on the bottom of the bucket, open end up, and pour in the acetone, liberally. I used about 1/2 quart at first. Quickly seal the open end with the bag you already folded. Now pick the intercooler up and tilt it every which way, letting the acetone run side-to-side, top-to-bottom. You can shake the unit gently, just don't blow out your seals. Always keep as much of the unit over your bucket as possible while you do this.
After a couple of minutes of sloshing the solvent around, your seals will probably start to leak. At this point, or whenever you think you've cleaned long enough, with the unit over the bucket carefully remove whichever seal is leaking the worst and pour the used acetone into the bucket. You know it's been working because it goes in clear and comes out a sickly brown.
If the solvent you poured out was really dirty then pour a couple more splashes in and rinse it. I ended up rinsing mine 4-5 more times because it was so dirty. There is no need to re-seal the open end at this point if you are careful.
 
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