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Coolant problems
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04-22-2016, 09:45 PM | #1 |
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Coolant problems
So I have a 335d m-sport that I bought brand new!
Since I bought it I installed a electronic performance wheel which gives me coolant temp reading! It never went more than 86 F Since 2-3 months, I see temperature going up to 98F And it happens on different type of driving, when the car idles and on the highway at 120 km/h I dunno what to do! I'm still under warranty and the dealers said that nothing is wrong ( no check engine) I use to hear the the fan start. Now I never hear them, I tried to let the car idle and let the temperature go up to 98F and I still cannot hear the fan start! I told the dealer to check it and they said ( 2 dealerships) that everything was normal! Could it be a bad thermostat or a temp sensor ? I'm confused!! Dealer doesn't want to do anything??? |
04-23-2016, 06:03 AM | #3 |
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I have the same exact car as you with 85k miles. About a month ago i discovered the cooling fan wasnt kicking on. Dealer tested the fan and sure enough it was dead. Swapped for a new one (pretty quick fix) and all is good now. Check if your cooling fan is on when you turn on the ac. If its reasonably warm outside the ac should also kick on the cooling fan.
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04-23-2016, 08:52 AM | #4 | |
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Has your cooling system been disturbed during maintenance ? It might possibly have air in the system. |
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04-23-2016, 10:48 AM | #5 |
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Are you sure those temps are F? Would be pretty typical if C.
There is a way to get the dash to show coolant temp by getting into secret menu; do a search. You can then check the steering wheel readout. |
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04-23-2016, 12:01 PM | #6 | |
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Fan never starts even tho dealership tested it and told me they were fine! The temperature is not normal, I've had the car since new and it never went over 86 degree Now it's at 98 |
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04-24-2016, 03:35 PM | #8 |
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Logan, cars that have all emissions in place can do this. If you're in middle of DPF regen when you turn car off, fan runs after shutdown to relieve high temps under the hood.
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04-24-2016, 07:33 PM | #10 | |
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At 70 mph my temp can go up or down 81-98 |
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04-24-2016, 09:16 PM | #11 |
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You shouldn't need radiator fan help when on freeway. I'm sort of wondering if this is another harmonic balance. That would cause water pump to not run.
335dM, any funny things going on with power steering or alternator intermittently ? |
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04-25-2016, 06:21 AM | #12 | |
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I'm kind of leaning towards a bad temp. Sensor |
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04-25-2016, 05:03 PM | #14 | |
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04-27-2016, 11:08 AM | #15 |
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OP, are the temps you're seeing measured in F or C? If C, you're OK, those are within spec. If F, they're far below where they should be and your thermostat is likely broken. Please confirm whether F or C, then see here for thermostat info: http://www.e90post.com/forums/showth...ghlight=thermo
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04-27-2016, 02:36 PM | #17 |
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04-27-2016, 03:23 PM | #18 | |
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04-27-2016, 04:47 PM | #19 |
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98C is just a couple of degrees higher than what I see with some frequency (205F or 96C). During regens I get to 100C or very close.
I replaced my thermostat in the fall of last year due to temps being too cold as Cuda suggests below. |
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04-28-2016, 07:43 AM | #20 |
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I believe that these thermostats are designed to fail open, so typical symptom would engine never gets to normal operating temp 86-88C
Have you ever had any part of the cooling system replaced like EGR cooler, etc? |
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04-28-2016, 02:40 PM | #21 | |
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That's it I'll just change the temp sensor even if I'm under warranty and change coolant. F&$ing stealership! I'm pissed at them not to do anything about it! |
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04-28-2016, 02:53 PM | #22 |
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Have you confirmed coolant temp from something other than your steering wheel? I assume theres a discrepancy with your wheel and not your actual coolant temp.
If your fan does kick on, its reaching the HI speed fan temp on the fan switch. That means the coolant in your radiator is hot enough to activate it, which again, leads me to believe your temps are fine. Thermostats do fail in the open position, which will cause issue getting to operating temp but, your fans are kicking on... I'm sure the dealer would like nothing more than to charge you hundreds of dollars to replace your thermostat or even replace unnecessary parts, the fact they tested and told you everything is working, again, leads me to believe there's an issue with your wheel and not the actual coolant temp. Confirm coolant temp another way before you start throwing parts at it. |
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