What causes this (vacuum hose sweating)
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Le Mans Master
Joined: Mar 2001
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From: Ann Arbor Michigan
What causes this (vacuum hose sweating)
Anyone know what causes the "sweating" of the vacuum hoses? There are 2 or 3 hoses on my 71' that look like this. It appears to be some kind of oil like substance. Hoses are only a couple years old.
Safety Car
Joined: Sep 1999
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From: AnyTown NJ
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
It's due to temp change (moisture condensing) and the dress-up goop applied to the hose. When I first got my car I had the same thing. I used Meguiar's Vinyl & Rubber Cleaner/Conditioner to remove it and give it a natural look.
Thread Starter
Le Mans Master
Joined: Mar 2001
Posts: 6,640
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From: Ann Arbor Michigan
Thanks, I'll pick some up and give it try. Funny, I've never used any kind of dress up goop on these hoses, must have come from the supplier that way.
Le Mans Master
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Racer
Joined: Jan 2007
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From: Ocala FL
They aren't Dayco hoses, ours don't do that.
There are a couple of likely causes. 1 is the goop some people dress them with to keep 'em loking good on the shelf. No really necessary, but they do it anyway.
The other is the plasticizer oil is leaching out. This happens when some suppliers put WAY too much oil in the rubber compound to make it cheaper and easier to extrude.
There are a couple of likely causes. 1 is the goop some people dress them with to keep 'em loking good on the shelf. No really necessary, but they do it anyway.
The other is the plasticizer oil is leaching out. This happens when some suppliers put WAY too much oil in the rubber compound to make it cheaper and easier to extrude.
Thread Starter
Le Mans Master
Joined: Mar 2001
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From: Ann Arbor Michigan
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Le Mans Master
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Safety Car
Joined: Sep 1999
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From: AnyTown NJ
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Didn't come back on mine.....but I'm not sure about this talk of oil leaching out.....mine seemed to have had a substance on them similar to what some folks put on their tires to give them that wet look.