Coolant temperature fluctuates - is it a problem?

[trauh]

I have a 2001 C2 Cab, and recently replaced the coolant tank and then the cap (with the 01 model). I have noticed that, once the engine has warmed up, the coolant temp ranges from the left side of the "0" in 180 to the right side of the "0". I think it used to stay pinned to the left side of the 0, so I wonder if I have a problem.

I mostly see temps rise when I am driving slowly. At highway speeds it is pretty much stabilized at the middle to left of the 0. I did a search and found instructions to check the engine compartment fan, which I did and it works fine. I also saw notes about there being a fan(s) for the front radiator, but I cannot see anything there. I did check to make sure there were not leaves and junk obstructing the radiators.

Any thoughts on this? Or am I worrying about nothing...

[Loren]

I don't think that is high enough to worry about.

The fans are behind the radiators. Just make sure that both the radiator and A/C condensers are clean of debris.

[nick49]

I believe there may be special method required for evacuating all of the air out of the system. If not done your coolant may not cool properly as it will be a frothy and foamy mixture and may show as erratic displays on the temp gauge. You may want to look into this as I have seen it on other vehicles,

[trauh]

Loren - Thanks for the feedback. I've found what I thought were the 2 front radiators (on the front, outside edges behind the front bumper), but where are the AC condensors?

I don't think that is high enough to worry about.

The fans are behind the radiators. Just make sure that both the radiator and A/C condensers are clean of debris.

[Loren]

In front of the radiators (see pic below)

Have a look at my 3rd Radiator Install DIY for more pics

http://www.renntech.org/forums/index.php?showtopic=7070