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coolant

  1. E34 M5 Discussion
    Hi all. My 91 M5 has been losing a LOT of coolant without any signs of internal or external leaks. Chris (bmwdirtracer) has helped me troubleshoot/diagnose the issue multiple times with leak down tests, pressure tests, etc and we still haven't been able to find anything. Previous owner had...
  2. E39 M5 and E52 Z8 Discussion
    I cannot get rid of the Code P0128 "Coolant Thermostat Coolant temp below thermostat regulating temp". I am on my 4th mechanic. Thermostats replaced 3 times, temp sensor, water pumps (secondary pump done at the dealer) even my radiator. I had it finally at the dealer who said it was the Aux...
  3. E39 M5 and E52 Z8 Discussion
    I have been smelling a bit of a burning plastic smell after I go for short drives in the M5. It might be unrelated, but I decided to check my oil level today and found this. This is after I cleaned it off and put it back in. I also don't remember my dipstick ever looking crooked like...
  4. E39 M5 and E52 Z8 Discussion
    Ok I have searched enough and no simple fix seems logical for my car. New Thread Time. First off Problems, then car history Purchased car 2 months ago and on the drive back the SES triggered. When I bought the car the previous owner informed me that the car took a while to warm up, minute or...
  5. E34 M5 Discussion
    I've got a 91 US model and I recently started getting a flickering check engine light. I pulled the code, 1223, coolant temperature sensor. I also get an occasional moment where the water temp gauge drops to zero, then returns on its own. Given the random flickering of the CEL, I figured it...
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