Random overheating on 2000 3.3L
I've been experiencing a seemingly random problem overheating on my 2000 3.3L GC. On most days, the temp gauge indicates mid range and all is well. Occasionally, the gauge ramps up to indicate overheating (and yes, it is overheating).
Coolant level is fine. (except, of course, when if overheats)
Water pump was replaced last winter.
Radiator and thermostat replaced last summer.
Serpentine belt is good and tensioner is working correctly.
Too rule out a faulty thermostat, I replaced it again and the problem is still occuring. Question: Is the thermostat position important? By that, I mean, is the clock-postion orientation of the thermostat critical? (I'm pretty sure I have the thermostat's "right-side-up" correct else I would have temp problems all the time, right?)
Could the lower radiator hose be collapsing and resrtricting flow?
Does this sound like an obstruction problem?