Official Operating temperature of an engine?

[rG-tom]

Hey,

I'm having some problems with BMW claiming that my thermostat is not faulty.

They are basically saying that because the ecu does not have a fault code, it is not faulty, despite the coolant temperature in the workshop menu not going above 65c even after hours of operation, sometimes as low as high 50s! When i first bought the car it sat around 90c all the time, 88-89 ish.

I have provided a photo of the workshop menu after an hour of driving etc but BMW service are saying that because I'm not supposed to access this menu they refuse to accept it as evidence, and are flat out saying there is nothing wrong with the car because the ecu has no faults.

At first he actually said it was the outside air temperature (59c in england at 11pm in february lol) until I provided him with the definitions below:


07.00 KTMP-MOM = Temp. Cooling Fluid (celcius)

07.01 ATMP-MOM = "Aussentemperatur" Temp. Outside (celcius)

I'm trying to find BMW's official stance on operating temperatures on the engine in the 335D so i can at least present this to them as well...anyone have any idea where to look? Once i have this I will be approaching the service manager instead of dealing with this service desk monkey.

any help would be appreciated.

 

[rG-tom]

it will go up if you force it like that but drop almost immediately, it wont sustain temperatures. As far as I am concerned and all bmw forums everyone is saying 90c, which rings true with my experience, but i need to find this officially.

 

[rG-tom]

You probably won't find it anywhere officially.

It's faulty though, you have 2 thermostats and one of them is broken. There is a main one and an EGR one.

Oh I know this, but trying to get BMW to accept this since "computer says no" is proving difficult.

This is extremely annoying as they had the car for four days to fix this and an issue with the glow plugs...they fixed the glow plugs but not this! I have a buyer for the car too waiting for this problem to be fixed

Tom.

 

[rG-tom]

Just had this reply:

I have checked with my warranty dept, we can look into this fault for you but it would not be covered on your warranty policy because there is
no diag code and no faults in the system, hence we are not prepared to take this any further.

How would you play this fox?

 

[rG-tom]

I don't understand why he would turn work away? This is a fairly straightforward fix and money in their pocket.

It's warranty work

 

[rG-tom]

Given where you live I would just go to another dealer, you have quite a few within 30 miles or so?

It's getting the car to a dealer that is the problem, I am on borrowed time now and most seem very busy and cant fit me in for over a week This was the only dealer i could get to fit me in! I need this fixing this week if not before Thursday, I already lost last weekend due to them taking longer to fix the glow plugs than they said.


Will try speaking to their service manager first and then another dealer.

 

[rG-tom]

i actually went to pick up the parts to do it myself last night from another dealership, who were part of the same group as the first so i hadn't approached them about the problem. Ended up having a chat with the parts manager about the stats etc and he said that fault stats often don't show a fault code as the ecu doesnt know it's broken as such.

he went and spoke to a servicing manager and they said there is a whole workshop procedure for testing stats without fault codes etc, and Ive dropped the car off this morning with them, and will have it back by Friday. Hopefully this will be the end of it but I'm still not holding my breath!