2012 Mercedes C250 1.8l turbo - coolant temperature
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2012 Mercedes C250 1.8L turbo
2012 Mercedes C250 1.8l turbo - coolant temperature
As part of my camshaft adjusters replacement I had to remove the thermostat housing. Everything's back together and runs great but I think I have some air in the coolant system.
When I 1st turn on car the cooling fan goes on right away. Car gets up to operating temperature and gauge in car goes up to just under 90 and stays there while driving. I plugged in my torque lite OBDII reader and although the car's gauge says 90 torque light says 105 to 108.
Does it make sense that maybe there's some air in the cooling system? I think I'll try to open overflow cap once the car is cool enough, start car and get up to operating temperature and then squeeze the radiator hoses and observe level in overflow and keep doing this until I see no more air bubbles. Does that sound correct? Also with a cool car I'll see what torque light says when the car is started.
Or maybe I didn't plug back in one of the connectors that goes to the thermostat? I seemed like everything went in where it's supposed to though.
Richard
When I 1st turn on car the cooling fan goes on right away. Car gets up to operating temperature and gauge in car goes up to just under 90 and stays there while driving. I plugged in my torque lite OBDII reader and although the car's gauge says 90 torque light says 105 to 108.
Does it make sense that maybe there's some air in the cooling system? I think I'll try to open overflow cap once the car is cool enough, start car and get up to operating temperature and then squeeze the radiator hoses and observe level in overflow and keep doing this until I see no more air bubbles. Does that sound correct? Also with a cool car I'll see what torque light says when the car is started.
Or maybe I didn't plug back in one of the connectors that goes to the thermostat? I seemed like everything went in where it's supposed to though.
Richard
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Joined: Nov 2010
Posts: 121
Likes: 28
From: Upstate NY
2013 C250 SPORT, 2014 WRX STI SEDAN, 2017 E300 4MATIC
As part of my camshaft adjusters replacement I had to remove the thermostat housing. Everything's back together and runs great but I think I have some air in the coolant system.
When I 1st turn on car the cooling fan goes on right away. Car gets up to operating temperature and gauge in car goes up to just under 90 and stays there while driving. I plugged in my torque lite OBDII reader and although the car's gauge says 90 torque light says 105 to 108.
Does it make sense that maybe there's some air in the cooling system? I think I'll try to open overflow cap once the car is cool enough, start car and get up to operating temperature and then squeeze the radiator hoses and observe level in overflow and keep doing this until I see no more air bubbles. Does that sound correct? Also with a cool car I'll see what torque light says when the car is started.
Or maybe I didn't plug back in one of the connectors that goes to the thermostat? I seemed like everything went in where it's supposed to though.
Richard
When I 1st turn on car the cooling fan goes on right away. Car gets up to operating temperature and gauge in car goes up to just under 90 and stays there while driving. I plugged in my torque lite OBDII reader and although the car's gauge says 90 torque light says 105 to 108.
Does it make sense that maybe there's some air in the cooling system? I think I'll try to open overflow cap once the car is cool enough, start car and get up to operating temperature and then squeeze the radiator hoses and observe level in overflow and keep doing this until I see no more air bubbles. Does that sound correct? Also with a cool car I'll see what torque light says when the car is started.
Or maybe I didn't plug back in one of the connectors that goes to the thermostat? I seemed like everything went in where it's supposed to though.
Richard
Thread Starter
Member
Joined: Apr 2019
Posts: 111
Likes: 19
2012 Mercedes C250 1.8L turbo
Thanks. I did that but I'll try again. The top radiator hose seemed squishier than usually but when I squeezed it the coolant level did move up and down but I did see some air bubbles too.
I think I'll jack up the front of the car (get the reservoir at the highest point), remove the cap and warm it up and squeeze the top hose again.
Richard
I think I'll jack up the front of the car (get the reservoir at the highest point), remove the cap and warm it up and squeeze the top hose again.
Richard
