03 GT 90K
Last year I replaced the coolant elbows and then a couple months ago it was the UIM. Today I was driving and noticed when I stopped at a light the engine was getting hotter. It would go back to normal while driving. Exact same symptom that it was doing before I replaced UIM.
When I got home I left it running and popped the hood and could smell coolant. Had a look around and it looks like it could be two potential problems.
It looks like the lower hose going into the rad was leaking but I also noticed the area around the coolant elbows that were replaced could also have been leaking. Didn't see a leak anywhere so I don't know for sure. I also noticed the reserve was below the hot line and it was bubbling a little. (Topped it off 2 weeks ago)
No coolant leaks on the driveway so it was either leaking while I drive or the coolant is going somewhere in the engine.
I'm going to top off the reserve when it cools down and see if any coolant stains show up under the front bumper but I guess after that I should do is get it pressure tested?
Based on this cars history I'm betting it's the LIM.
Thanks for any advice.
Another disgruntled GM owner.
