Under-Dash Leaks? - Defender Source
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  #1  
Old April 29th, 2012, 07:46 AM
Philster2
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Phillip Krall
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Under-Dash Leaks?

i've been having mysterious starting problems with my '94. The latest place that the search for an answer has led is to the fuse box/ relays. Things are badly corroded and there is water. Any idea of the likely source of a leak? Any suggestions would be very appreciated.

Phil
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  #2  
Old April 29th, 2012, 10:09 AM
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Carl Jonsson
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Dash vents would be the first suspect.
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  #3  
Old April 29th, 2012, 02:57 PM
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Originally Posted by Manimal View Post
Dash vents would be the first suspect.
Bingo. Just replaced mine and it appeared to be the issue. However, don't count on the adhesive backing on the new vent seals...I did and it failed within days. I had to remove everything again and put it back on with 3M weatherstrip adhesive.
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  #4  
Old April 29th, 2012, 03:36 PM
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Robert Klima
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Use the Series vent seals instead the later Defender ones. The older style seals are of a different rubber/foam material which seals better. And as Jason already said use some good adhesive...

Robert
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Old April 29th, 2012, 03:42 PM
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Originally Posted by berti1554 View Post
Use the Series vent seals instead the later Defender ones. The older style seals are of a different rubber/foam material which seals better. And as Jason already said use some good adhesive...

Robert
Just keep in mind the older ones seal against the bulkhead (rather than the vents themselves). I opted for the same vent style just so I didn't have to see them on the bulkhead.
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  #6  
Old April 29th, 2012, 07:39 PM
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Matthew
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I swapped mine out to the series mounted on the bulkhead. They are legit. You may want to pull your dash out because there is likely rust along the seam at the bulkhead and the footwells. Mine definitely did due to years of leaks prior to taking ownership. A little extra effort will go along way.

------ Follow up post added April 29th, 2012 07:40 PM ------

It could also be a plugged drain in your heater fan intake sucking in moisture and then working down the bulkhead into your fuse panel. I would till bet on the vents though.
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  #7  
Old April 29th, 2012, 09:11 PM
Philster2
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Thanks for your input. This definately leaves me with a couple places to look.
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  #8  
Old April 30th, 2012, 06:03 AM
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George
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Quote:
Originally Posted by nathanwind View Post
Bingo. Just replaced mine and it appeared to be the issue. However, don't count on the adhesive backing on the new vent seals...I did and it failed within days. I had to remove everything again and put it back on with 3M weatherstrip adhesive.
Did you pull the vents off to replace the seal or did you cut the seal in order to get it around the lever arm?
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  #9  
Old April 30th, 2012, 09:51 AM
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Originally Posted by geoellis View Post
Did you pull the vents off to replace the seal or did you cut the seal in order to get it around the lever arm?
I did pull them...but it's because I had to repair one of the vent arms anyhow, plus I had the inside dash out too so it seemed like the time to do it.
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  #10  
Old April 30th, 2012, 09:55 AM
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If you knock the pins out, it's very easy to get a small ratchet on the bolt that connects the arms to the vent. The other bonus is it's much easier to clean off all the old residue etc. I ended having to use laquer thinner, a rag, and a scraper to get it clean, but it did a fantastic job.
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