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General E46 Forum
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Old 01-09-2013, 12:49 PM   #41
WDE46
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Originally Posted by |2eckLesS View Post
Here is a post from a week or two ago that might be able to help. If you need more logging let me know
Needs units, scale, and more JPEGness.
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Old 01-09-2013, 12:50 PM   #42
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Drat mine was between 77-87 after 45 min drive, so what are your recomendations, go BMW $90+, behr $60+,or wahler $50+?
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Old 01-09-2013, 01:31 PM   #43
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Drat mine was between 77-87 after 45 min drive, so what are your recomendations, go BMW $90+, behr $60+,or wahler $50+?
What were your outside temps when you had the 77-87C? It does sound a bit low.

Great question about what thermostat vendor to use, BMW is usually over priced as they have to have $$ in the part for the 24 month unlimited warranty.

I am not an expert on these heated stats, I know my M5 Behr was OE and you could get a Behr for about 1/2 as compared to dealer pricing even at wholesale level.

Not sure if Behr or Wahler is a better option. Some have found repackaged Wahler at Napa and other parts stores for decent pricing as I recall.

On thing I have learned is DO NOT purchase or use the aluminum housing option, there have been a lot of cases where the heater has shorted out and as I recall it dumps a fuse for the fuel pump or at least puts the car in a no start mode.

|2eckLesS thanks for your graph and the reminder about the bimmersoftware, I think I ran across this some time ago, but will check into it again.

Thanks for everyone reporting in, at least we can kind of see the expected range these engines should be operating at, not sure we will be able to find soft failed stats during the Summer months?
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Old 01-09-2013, 01:31 PM   #44
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Needs units, scale, and more JPEGness.
The units are at top of the black bar at an cruising speed. I don't know if the program has y axis titles and I can see how it might be difficult because you can add and remove what you want to track on the data log and have multiple data points running at once. The software writer is a member so I can always ask if he can do a patch upgrade to add if possible. I will do a log from a cold start tomorrow morning on the way to work and take outside temp and post it up. Any one else have any data they want to have added to this?

BMW is Behr with warranty, most go with this because it what came on the car and only a 2 dollar difference on bmaparts. 56 and 54~ if memory serves me correctly

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Old 01-09-2013, 01:55 PM   #45
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I have been suggesting Wahler to people and I bought one myself. My understanding is that Wahler was an OEM. I think you're okay with Genuine, Behr, or Wahler, but the big thing, that JFOJ already mentioned, is NOT getting an aluminum one or off brand.

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Old 01-09-2013, 01:56 PM   #46
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behr works fine for me.
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Old 01-09-2013, 02:02 PM   #47
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I have been suggesting Wahler to people and I bought one myself. My understanding is that Wahler was an OEM. I think you're okay with Genuine, Behr, or Wahler, but the big thing, that JFOJ already mentioned, is NOT getting an aluminum one or off brand.
Just checked my old stat...Wahler...with a molded bmw roundel.

My behr radiator fit perfectly, so I suspect either would be fine.
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Old 01-09-2013, 02:06 PM   #48
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I went with the Wahler because it was EOM and it went on in minutes with no issues.
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Old 01-09-2013, 02:46 PM   #49
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I have about a 40 min commute home from work, ambient temp was 32-37 degrees. Let the car run for about 30 seconds to circulate oil before taking off while getting the gauge test up and running. The car reached 92-93 degrees with in about 10-12 min of driving. Leaving my parking lot I pull onto a 55MPH road for about 20min with 2 stops for stop signs. After that I have about 20min of interstate driving 70-72MPH, the temp seemed to stay about 93 for pretty much the whole drive. Highest the temp got was 94. The thermostat is about 2k miles old along with new hoses, expansion tank, waterpump etc..
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Old 01-09-2013, 02:47 PM   #50
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I have about a 40 min commute home from work, ambient temp was 32-37 degrees. Let the car run for about 30 seconds to circulate oil before taking off while getting the gauge test up and running. The car reached 92-93 degrees with in about 10-12 min of driving. Leaving my parking lot I pull onto a 55MPH road for about 20min with 2 stops for stop signs. After that I have about 20min of interstate driving 70-72MPH, the temp seemed to stay about 93 for pretty much the whole drive. Highest the temp got was 94. The thermostat is about 2k miles old along with new hoses, expansion tank, waterpump etc..
Do you have a stewart pump?
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Old 01-09-2013, 02:55 PM   #51
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Do you have a stewart pump?
No, Saleri composite pump
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Old 01-09-2013, 02:59 PM   #52
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No, Saleri composite pump
Okay, that's what I bought too. When I do my overhaul I'll see if a new pump lowers the temps at all. I doubt it will.
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Old 01-09-2013, 03:12 PM   #53
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I hit about 95 to 100 C. I sit around 100C once fully warmed up on freeway. Is this too high?
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Old 01-09-2013, 03:41 PM   #54
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I hit about 95 to 100 C. I sit around 100C once fully warmed up on freeway. Is this too high?
That seems a little high, but it's not too concerning. Maybe your thermostat is slightly stiff or something. Maybe the 323s run hotter?
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Old 01-09-2013, 03:43 PM   #55
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What were your outside temps when you had the 77-87C? It does sound a bit low.
About 48-50F (9-10C),

Was reading 77-80 The first 15-20 minutes doing highway, then with some stoplights, moderate traffic and 20+ minutes driving it was between 85-87 maybe 88, had one peak at hard acceleration from full stop, hitting 89 but only a few secs before it dropped.
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Old 01-09-2013, 03:48 PM   #56
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About 48-50F (9-10C),

Was reading 77-80 The first 15-20 minutes doing highway, then with some stoplights, moderate traffic and 20+ minutes driving it was between 85-87 maybe 88, had one peak at hard acceleration from full stop, hitting 89 but only a few secs before it dropped.
That's stuck open then, but just a little. That's a little better than what mine was and I couldn't get above 87 in similar weather.

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Old 01-09-2013, 04:29 PM   #57
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About 48-50F (9-10C),

Was reading 77-80 The first 15-20 minutes doing highway, then with some stoplights, moderate traffic and 20+ minutes driving it was between 85-87 maybe 88, had one peak at hard acceleration from full stop, hitting 89 but only a few secs before it dropped.
Sounds a bit on the low side, see what nae36 posted above, he has what looks like a pretty typical car with slightly cooler outside temps.

I would start planning on getting a thermostat and other items ready for a weekend job.

Suggest you also change the O-ring on the temp sensor in the lower radiator hose while you are at it.
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Old 01-09-2013, 04:31 PM   #58
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checked mine again today. stayed at 93. peaked at 96 for a brief second then went back down to 93.
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Old 01-09-2013, 04:35 PM   #59
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I hit about 95 to 100 C. I sit around 100C once fully warmed up on freeway. Is this too high?
Your seems slight higher than most, what were your outside temps.

I would check your fans, fan clutch, debris or blockage between the AC condenser and radiator, maybe you have a water pump with a broken vane or starting to slip a bit.

The difference between 95-100 is on 9F, but you are right above where we are typically seeing most cars, but lets see what your outside temps are.

Something to at least watch.
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Old 01-09-2013, 04:41 PM   #60
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I drive like 20 miles to work, i'm kind of on the fence about my thermostat,
Idle/city driving avg =90-92, but goes as high as 96 under stop and go traffic, highway it stays at 90/91 but the main concern of mine is, when i pass someone, the temp goes to 84, but after it slowly goes back up to 90, when i go back to cruising speed. Thermostat was replaced just a bit over 2 and half years ago. Would 84 be too low?
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