Coolant changed, and then...

[brainpause]

2001 2500HD 6.0

 

Took my truck to a national chain that I've used before and Trust. Never mind which one. Had the coolant changed and some other front end issues worked on this past Saturday.

 

When I left it was a little warm so I was running my air conditioner. Then yesterday it cooled off quite a bit so I turned on the heater and a few minutes later the low coolant light came on. I started to drive home anyway thinking it was maybe just a little bit low. But I hooked up Torque application using my OBD2 diagnostic in the coolant temperature was steadily Rising. I decided to take my truck back to work and drive a work truck home.

 

Here is where I admit some ignorance about the procedure and I wonder what might have happened.

 

When the coolant is flushed, aren't they supposed to run it through the heater core somehow? Or maybe they did and then it had an air bubble in it and so it didn't fill the heater core?

 

Or maybe there was a very large air bubble somewhere else in the system?

 

I did check the Overflow container and it looked empty but it was dark. The engine was fully warmed up.

 

So what could have possibly happened or what did they forget to do? Or maybe it just needs a little more coolant?

 

 

Edited January 29, 2018 by brainpause

[txab]

Sounds like they just didn't get all the air out. Top it off your self or take it back to the servicing shop

[dewfpo]

Yeah, it just sounds like they didn't run it after the changeout to get all the air pockets out.  After you ran it, the air came out and the coolant in the reservoir flowed back in to take up the air space.  Just top off your reservoir or take it back to them to do it.

 

DeWFPo