View Full Version : thermostat ?s

07-07-2003, 06:17 PM
Ok, noob question, but what is the stock temp for the thermostat on my '97 328is? And, I'm thinking of going a bit cooler than stock, but not so much that the car stays in warm-up mode. Anyone use a lower temp t-stat and at what temp? Also, do I have to go OEM t-stat, or can I get a good quality one at the parts store?

I've done this in other cars, just not sure what the tolerance of these engines is temp wise ...


Stephen 325TDS
07-07-2003, 06:21 PM
I think that the standard is 88 degrees C. But at the top end I've seen 92 degrees C. I'm not sure about the lower end, but I think it's 82 C

07-07-2003, 08:15 PM
hmmm, I appreciate the info., but what does that translate into Farenheit, I'm just a poor Yankee!


Stephen 325TDS
07-07-2003, 09:18 PM
Apologies 2slow3.

82 is approx 179F

88 is approx 190f
92 is approx 197f.

'hope this helps.


07-08-2003, 11:48 AM
No apologies needed, I just never got the hang of the C to F conversion!

Thanks for the info, much appreciated!

07-08-2003, 12:30 PM
If your car is stock, I do highly recommend sticking to the same thermostat. For the 328i I would stick with the 88C.

07-09-2003, 02:08 PM
I changed my standard t-stat to a 318, I also had to change the t-stat switch and add watter wetter and remove the rad fan. Nice cheap engine mod and only cost me about $100 bucks and all OEM parts

this will work on your aswell

07-09-2003, 04:12 PM
thanks for the info. What's the difference with the 318 t-stat? I have to change out the radiator fan anyway (new one should arrive today), so am going to do the t-stat and t-stat housing at the same time.


07-09-2003, 04:33 PM
I like to run with a hotter t-stat installed in my car, but that's to get better fuel consumption, and because it gets cold up here in the winter time. On my past cars however, putting in a lower temp t-stat gave me some better performance.

07-09-2003, 04:44 PM
thanks for the input ... good point about the fuel consumption, but i went from getting 12mpg average in my last car to 23 in the bimmer, so I'm already happy there!

yeah, it gets cold here in the winter too. i ran a 180 F degree t-stat in my Dodge Ram (stock was 190) and never had any trouble, even on the coldest days. In fact, the truck warmed up much faster with the lower temp t-stat. but, going into that, I knew the dodges like the colder setting, just not sure of the tolerance on the bimmers ...

07-16-2003, 11:51 AM
So, one more ? ... can I get a good quality t-stat at a parts store (I've always had good luck with Robert Shaw), or do I HAVE to go OE for this one?