paul73mt
Active Member
- Joined
- Jul 18, 2012
- Messages
- 679
- Location
- Great Britain
- Car
- 2010 C350 CDI Sport sold , 2015 E250 CDI AMG Line Sold
In my own experience I find that the first thing people do when the car takes longer than usual to get up to temp is blame the thermostat. So they change it and hey fault fixed. But what they actually done was replace the thermostat THEN put in fresh clean new coolant fluid to the exact mixture that it is supposed to be. So majority of time it isnt the actual thermostat. People tend to top up with coolant and keep doing it. The mixture ends up that lean that its almost 100% coolant. The chances of that getting up to any kinda of temp close to your 80/90 are quite slim. What I do when I get a car in with similar complaint is flush the coolant system a few times and simply mix the proper coolant concentration according to the car and the problem is solved 99% of the time. The ones I have had to change thermostats on are ones that are stuck closed and cause more serious problems. I suggest flushing system and replacing ur coolant 1st properly before moving onto the thermostat.
What about when a car has been into MB and they have tested the coolant to see its ratio, They have tested the cooling of the car and found to be ok, but this was done when it had already been at its normal operating temperature. Does anybody know if you can force the thermostat open with star via the ecu ???