Reply With QuoteT stat ought to keep the temp up. Sounds like a lazy one, cheap replacement if in doubt.
Major Contributor
Is this normal? Temp to drop when going real fast in cold weather
So I was doing 160km/hr (100mph) tonight -- it's 3:42AM local time here and it was about 8 deg C (46 deg F) ambient temp according to the OBC, when I noticed that the temperature gauge on my dash board was actually dropping.
Usually the needle is a hair-width's away from the middle notch, but tonight it dropped a fair bit to the left, past the notch between stone cold and middle.
I found this quite odd, does this make sense to anyone at all?
4 Grand Master
T stat ought to keep the temp up. Sounds like a lazy one, cheap replacement if in doubt.
"The gas pedal wouldn't go to the floor if it weren't meant to be there"
Green Beret Special Ops
ditto, replace it with a BMW stat available at your favorite online sources.Originally Posted by Ross
95 E34 530I V2.37
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Those who make peaceful revolution impossible will make violent revolution inevitable.
John F. Kennedy
3 Grand Master
make sure you pick up the right temp
T stats come in several temps 90, 88, etc.
and local shop tried to sell me a 72 for my M50tu...eeeh Wrong!
Vee ave vays of dealing vid your kind...........
Bad t-stat, my 540i ran just above blue the whole way back from Oregon. Swapped a fresh one in, and it sits at the middle all day.
4 Grand Master
Yep... bad thermostat...
Major Contributor
OK thanks for your replies guys. Looks like I'll be writing an email to Patrick from BMA
Grand Master
i would consider this normal. i do this quite often and the needle ussually drops just a fraction at higher speeds. makes sence to me.
2 Grand Master
My thermostat used to be really sluggish, especially in cold weather, causing the engine to run cooler for long periods of time. I installed a new one and the engine heated up much more quickly. One other thing i noticed was that with the new thermostat, the final temperature is about a needles width right of center rather than exactly at center where is was before.
Lowered with blue h&r(?) springs, Bilsteins, tint, 19# design 3 injectors, Dual Magnaflow
southwest WA
Major Contributor
OK well this has thrown a spanner in the works! (Haven't emailed Patrick yet). I noticed that my needle is fine now, it only did it at (really) high speed. It's not often that I drive so fast anyway.
If the replacement is cheap and easy to do, I might as well do it. How are you supposed to know what t-stat you need though, since there are so many? I had followed a little bit the "controversy" surrounding installing a different t-stat to what the factory put in your car and it does this and that for your engine which supposedly improves something, however I am not interested in this and just want to maybe replace the t-stat with the same spec as what was installed originally in the car.
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