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Old 12-29-2012, 10:35 PM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
Join Date: Mar 2008
Posts: 25,236
Mein Auto: 02 BMW 525i M54 auto 130K
Originally Posted by BM109R View Post
how critical is it to change the three marked hoses?
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.

Originally Posted by BM109R View Post
Are those known to wear out and leak to at around the same time as everything else?
Looking at this thread, from an anecdotal perspective, these hoses are not unreliable:
- Pictorial look at typical E39 cooling system failure modes (1)

Originally Posted by BM109R View Post
Does the nissin radiator come with a drain plug
IIRC, mine did.

Originally Posted by BM109R View Post
and are there any fitment issues different from OEM.
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

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)

Originally Posted by BM109R View Post
Is it better than behr?
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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Please read the suggested threads and add value, either by pictures or by descriptions, so the next person stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need

Last edited by bluebee; 03-29-2014 at 04:59 AM.
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