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Old 02-17-2019, 11:43 AM
Russianblue Russianblue is offline
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Location: Charlotte, NC
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well, turns out I have multiple issues to take care of before continuing to assess. first off, the aux water pump was dead. I think it's probably been dead for years and I always thought the X just had a crappy heater until I got my 2005, which has a GREAT heater. I'd suspected this a while back on the 03 so I had a replacement at the ready which I installed in about 15 min.

2nd, I turned on the secret menu and watched the coolant temp while driving. it will not go past 84c...which may explain why there are some traces of soot under the tail pipes. in my 2005, the fully warmed engine is between 90-93C almost always.

so that means the 6 year old T-stat on the 2003 is probably bad. i'll change that this week.

after replacing the aux pump, the heater behaved a tad differently on the Auto setting. I still need to spend some more time this week assessing it but my first hunch is that I could have a partially stuck heater valve. there's a definite change in the temp of the air coming from the vents when at a stoplight compared to driving. I have to eliminate all these issues though before I can get an accurate assessment of the IHKA situation because all of those parts affect the way the heater behaves in various situations.
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2005 X5 3.0i - 71k mi (9.2018) -> 81k (9.19) -> 100k 9.21
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SOLD : ( 2003 X5 3.0 - 177k mi (9.2018) -> 186k (9.19) -> 205k (9.21)
SOLD : ( 1997 328is Coupe - Hellrot Red
SOLD : ( 1988 528e w/ Bullseye s256 / MS2 Extra / GC Coilovers / Yukon Coils ~ 300+ HP
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