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87 - 911
Join Date: Nov 2010
Location: Ontario, Canada
Posts: 200
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Over 5 years ago I replaced mine with the expanding aluminum type, so far still tight and dry. Did not remove the heat exchangers as the fasteners were rusty and did not want to deal with that issue as well.
Before digging into it i read through the hints and suggestions posted by others, it required some work arounds but job was completed over a weekend.
One suggestion is to throughly clean the surrounding area before removing the old tubes, once the tubes are removed there are large access holes directly into the engine.
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