
12-29-2012, 09:35 PM
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Seek to understand,^Value
Location: San Jose, California
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Join Date: Mar 2008
Posts: 17,153
Mein Auto: 02 BMW 525i M54 automatic
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Quote:
Originally Posted by BM109R
how critical is it to change the three marked hoses?
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My understanding is that most people do not change them - but it's probably a good idea to replace any and all rubber at the age of our vehicles.
But I would base any deeper assessment on a visual check and the current prices.

Quote:
Originally Posted by BM109R
Are those known to wear out and leak to at around the same time as everything else?
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Looking at this thread, from an anecdotal perspective, these hoses are not unreliable:
- Pictorial look at typical E39 cooling system failure modes (1)
Quote:
Originally Posted by BM109R
Does the nissin radiator come with a drain plug
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IIRC, mine did.
Quote:
Originally Posted by BM109R
and are there any fitment issues different from OEM.
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Getting the Behr out of the vehicle isn't all that difficult:
- Removal instructions for the alternator & drive belt system of a 2002 525i
- Removal instructions for the fan shroud of a 2002 525i
- Tools necessary for a cooling system overhaul
etc.
But, on the automatic I6, getting the Nissens/Behr back in is the hardest part:
- One user's cooling system overhaul: How to get the radiator back on (1)
Quote:
Originally Posted by BM109R
Is it better than behr?
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Methinks they all stink.
Personally, I don't wish to reward Behr for making garbage - so I bought Nissens garbage instead.
Here you see what the Behr looks like inside:
- Behr radiator and Behr expansion (aka surge) tank autopsy (1) (2)
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