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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 06-27-2011, 05:57 PM
pleiades pleiades is offline
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The "rest" of the hoses for the '99 MY 528i w/auto climate control

I did most of my cooling system overhaul (last summer) but didn't change out any of the small heater-related hoses on this M52TU. My car is equipped with automatic climate control and apparently some of the connections back there are different from other same-year models. Here's a list I've tried to compile. If I've missed anything I hope someone with a similar e39 might step in and add on where necessary. [My car is high-mileage and these hoses appear to be original. I'm planning to switch to NPG+ coolant soon and want to change them all out at the same time.]

From this web page

#5 Water hose 11531438634 $30.20 (to heater)
#6 *Water pipe 11537502525 $35.83 (*No need to change?)
#7 O-ring 11531435808 $ 1.81
#8 *Heater inlet pipe 11531705210 $30.08 (*No need to change?)
#11 Water hose 11531438632 $33.96 (exp tank **** heater lines)
#16 Water hose 11531438633 $26.42 (exp tank **** aux. wtr pump)

*Apparently #6 and #8 are metal piping and need not be replaced. Correct?

And from one more realoem.com page

#5 HOSE F ENGINE INLET AND ADDIT.WATER PUMP
164218391003 $17.00

#8 HOSE F WATER VALVE AND RIGHT RADIATOR
164218391017 $16.16

#9 HOSE F WATER VALVE AND LEFT RADIATOR
164218367929 $9.77

#12 HOSE F RADIATOR AND ENGINE RETURN
164218367930 $7.43

Some of the realoem descriptions have me confused. #8 and #9 above for instance include the words "right radiator" and "left radiator." In this case, do they mean the right and left sections of the heater core? And is it #5 from the "addit. water pump" that connects behind engine cylinder #6? Unless I remove assorted covers I can't see that end....) Although these look mostly like "plain-old" heater hose that you could get cut to size from your local auto parts dealer, they appear to have at least one end molded to fit with a specific type of hose clamp. Anyone have details?

NOTE: I didn't type out all the hose clamp info but they're listed on those realoem.com pages in the quantities needed along with prices....
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  #2  
Old 06-27-2011, 06:07 PM
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doru doru is offline
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Something is confusing.
I thought you were referring to this diagram.
There you have hoses #5,8,9 & 12. These hoses go to the heater core and the automatic heater valve.
If you remove the hoses, take off the heater valve and check if it's clean. See this here, how it can get nasty. Maybe this car never had the coolant flushed every 2 years (OEM stuff).
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Last edited by doru; 06-27-2011 at 06:09 PM.
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Old 06-27-2011, 06:25 PM
pleiades pleiades is offline
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Quote:
Originally Posted by doru View Post
Something is confusing.
I thought you were referring to this diagram.
There you have hoses #5,8,9 & 12. These hoses go to the heater core and the automatic heater valve.
If you remove the hoses, take off the heater valve and check if it's clean. See this here, how it can get nasty. Maybe this car never had the coolant flushed every 2 years (OEM stuff).
No, my car is a DM53, not the DM63 that your webpage linked to. Now I need to know the difference but the parts look to be in the same place....

And that other link, that's just plain disgusting (I hope I don't get to see that on my car....)

Okay, folks with DM53 cars like mine have 5-sp. manual transmissions, those with DM63s are automatic transmissions.

By the way doru, did you change lots of cooling system parts/hoses when you switched to NPG? If yes, did you run plain coolant through them first to check for leaks?

Last edited by pleiades; 06-27-2011 at 06:32 PM.
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Old 06-27-2011, 10:37 PM
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doru doru is offline
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I changed pretty much everything exept the thin hoses. Everything I replaced "looked" good except for the pullies which were shot. I flushed with water until the blue color was gone - that's about 3 flushes. The new expansion tank was leaking.
I ended up with some water/moisture, and every day after driving I would open the expansion tank cap. I had a slight hiss for about 2 weeks, and one day there was nothing. Even when I had that trace of water, the hoses were soft at full operating temp, and you could remove the cap with engine running.
To check for leaks, you can either run the new parts with water at full operating temperature (but then, you will not have the white trace), or do a pressure test at an indy.
My level is unchanged.
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Looking for a DIY? Parts? Check this out, it might be your ticket
TMS underdrive pullies - Stewart WP - PSS9 - Beisan Vanos seals - Zimmerman cross-drilled & Akebono Euro - Deka 649 MF - 55w HID headlights - 35w HID foglights - Hualigan double din - ACS (rep) alu pedals - Euro central storage console - Breyton Magic Racing staggered wheels - M5 bumper - M5 steering wheel - Tint
Stable: e39, e53, e46 & Tribby
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Old 06-27-2011, 10:46 PM
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bluebee bluebee is offline
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Mein Auto: 02 BMW 525i M54 auto 130K
I tried a while back to itemize all the cooling-system related hoses ... and (mostly) failed in that endeavor - having only identified the biggies:

- Complete cooling system overhaul recommended parts list (1)
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