OBC 19.7.00 - Watcha' go? doityourself

Numbers are in Celsius, once plateau is reached.

Oli77 [2005 2.5L M54 DME-MS45.1] : 96
Danewilson77 [2004 3.0L M54 DME-MS45.1] : 95
Telijah [2001 3.0L M54 DME-MS43] : 88 (suspects open T-stat)
edlvrt [2004 3.0L M54 DME-MS45.1] : 96
MrMaico [2004 3.0L M54 DME-MS45.1]: 96
Spencers [2001 2.5L M54 DME-MS43] : 90
LivesNearCostco [2003 3.0L M54 DME-MS45.1] : 91 (old T-stat)
LivesNearCostco [2003 3.0L M54 DME-MS45.1] : 95 (new T-stat)
derbo [2004 3.0L M54 DME-MS45.1] : 95
GT172I [2004 3.0L M54 DME-MS45.1] : 96
shanneba [2003 3.0L M54 DME-MS43] : 89 (running water wetter and stewart pump)
Hochspannung [2005 3.0L M54 DME-MS45.1] : 87 that's the outlier, unless these are the M car values.
Kayger12 [2005 3.0L M54 DME-MS45.1] : 95
RITmusic2k [2004 3.0L M54 DME-MS45.1] : 83 T-stat work ongoing
terraphantm [2003 3.0L M54 DME-MS45.1] : 95
Hermes: [2005 3.0L M54 DME-MS45.1] = 95
328ioc: [2005 3.0L M54 DME-MS45.1] = 95
WOLFN8TR:[2005 3.0L M54 DME-MS45.1] = 90
pip: [2005 3.0L M54 DME-MS45.1] = 97
Johnrando: [2006 3.0L M54 DME-MS45.1] = 94
Meric: [2004 3.0L M54 DME-MS45.1] = 98
Nivo: [2004 3.0L M54 DME-MS45.1] = 95

Bump for newcomers.

Wolf, did you gas door start to behave eventually?

Quote:

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Originally Posted by Oli77

Bump for newcomers.

Wolf, did you gas door start to behave eventually?

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Ya it's all good now. Just needed lubed was all.

High of 95 cel. At 65mph on a 98 degree (f) day. Would drop down to 93 or 92 sometimes but seemed to really like 94 the most.

Numbers are in Celsius, once plateau is reached.

Oli77 [2005 2.5L M54 DME-MS45.1] : 96
Danewilson77 [2004 3.0L M54 DME-MS45.1] : 95
Telijah [2001 3.0L M54 DME-MS43] : 88 (suspects open T-stat)
edlvrt [2004 3.0L M54 DME-MS45.1] : 96
MrMaico [2004 3.0L M54 DME-MS45.1]: 96
Spencers [2001 2.5L M54 DME-MS43] : 90
LivesNearCostco [2003 3.0L M54 DME-MS45.1] : 91 (old T-stat)
LivesNearCostco [2003 3.0L M54 DME-MS45.1] : 95 (new T-stat)
derbo [2004 3.0L M54 DME-MS45.1] : 95
GT172I [2004 3.0L M54 DME-MS45.1] : 96
shanneba [2003 3.0L M54 DME-MS43] : 89 (running water wetter and stewart pump)
Hochspannung [2005 3.0L M54 DME-MS45.1] : 87 that's the outlier, unless these are the M car values.
Kayger12 [2005 3.0L M54 DME-MS45.1] : 95
RITmusic2k [2004 3.0L M54 DME-MS45.1] : 83 T-stat work ongoing
terraphantm [2003 3.0L M54 DME-MS45.1] : 95
Hermes: [2005 3.0L M54 DME-MS45.1] = 95
328ioc: [2005 3.0L M54 DME-MS45.1] = 95
WOLFN8TR:[2005 3.0L M54 DME-MS45.1] = 90
pip: [2005 3.0L M54 DME-MS45.1] = 97
Johnrando: [2006 3.0L M54 DME-MS45.1] = 94
Meric: [2004 3.0L M54 DME-MS45.1] = 98
Nivo: [2004 3.0L M54 DME-MS45.1] = 95
NorCalZman: [2005 3.0L M54 DME-MS45.1] = 94

Just checked mine tonight almost ran a stop sign and managed to reset my odometer but then got it figured out. It fluctuates a little but 95 most of the time

Bump

Feel like a bump.

I had some odd behavior recently. I was stuck in stop and go 5mph traffic for over and hour last weekend. Also, It was really hot outside. Randomly my temp dropped down to the low to mid 80s and stayed there until I sped up. Then when I hit stop and go again for awhile it dropped down again. I have not ever been in traffic like this before so I wonder if this is programmed behavior if some part of the engine is getting too hot? My entire cooling system is brand new (except the sensor in the lower hose. I reused that).

Quote:

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Originally Posted by NorCalZman

I had some odd behavior recently. I was stuck in stop and go 5mph traffic for over and hour last weekend. Also, It was really hot outside. Randomly my temp dropped down to the low to mid 80s and stayed there until I sped up. Then when I hit stop and go again for awhile it dropped down again. I have not ever been in traffic like this before so I wonder if this is programmed behavior if some part of the engine is getting too hot? My entire cooling system is brand new (except the sensor in the lower hose. I reused that).

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This is normal behavior and partly why BMW makes the needle sit in one spot from 75C-113C. The engine normally runs around 96-98C for maximum efficiency. To avoid overheating if the engine load suddenly increases, the DME can activate a heating element on the thermostat (that connector on top of it) to increase coolant flow. The FSM has a detailed explanation on the Characteristic Map Thermostat, and it's behaviors.

In the conditions you were driving it in, chances are it was either creeping past the activation threshold, or the load on the engine changed while it was at operating temperature. It takes my car a few seconds for the temp to drop, so that's probably why it seems random. When I was driving around in Palm Springs in the summer, the car would drop from 96-98C to high 80C whenever I stopped and started moving again.

If you want to watch it work, try this: Drive at a steady speed on the freeway once the temp is stable. Floor it for a few seconds in 6th and you should see the temperature drop. After some more steady cruising, it should creep back up to normal.