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post #4 of Old 01-05-2013
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Re: Yanmar 2GM20F mixing elbow Pearson 31-2


Looks like both your flange and your elbow are aluminum.

You might want to try applying a little (maybe a lot) of heat to the pipe coupler (your "joint") to try and get the two apart.

As for cleaning out the inside of the mixing elbow: If it is aluminum, you'll need to be careful if you want to try boiling it out. Radiator shops usually have set ups to do this, but make sure you you talk to the owner/foreman and discuss the risk up front.

For DIY, I'd think about letting it soak in Spray Nine for a while first, to see if that helps loosen things up a bit. Carb and/or brake cleaner might also be somewhat effective.

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