2002 Jeep Liberty 3.7L cooling problem (60,000 miles) : it would overheat if driving at low speeds (30mph and under) . Repair shop did pressure tests, results were good. Fan was checked out and was told it was working ok. Kindly seeking any suggestions? Greg

check that the cooling fan is operating , if does check the coolant level and check the coolant for signs of oil , remove the oil filler cap ,look at the under side of the cap , if has a white/grey sludge that would indicate that theres coolant in the oil ,possable head gasket problem so would need further investigation at a repair shop.let me know how you get on

why?
post symptoms. (leaks?)
too low idle speed?
what?
the lamp comes on , when oil pressure is too, low
one way is stuck open egr, and rpm 800 good) drop to 300.
look at the tachmeter, see where RPM is.

blind answer , unscrew it CCW.
using a wrench.

So what is the question ?

You can not use it like that

You know how to diagnose &
repair yourself or you go to
a repair shop

it's overheating, for sure,
is coolant levels dropping? cold checked at rad cap?
"pulled over and found a hose to cool the radiator and hose near the thermostat,"
i can not understand this statement"above"
if it overheat only parked, check fan for full ops.
if overheats moving too, wont stay cool moving fast
then:
bad rad cap
bad thermostat , they have 7 year life says STANT. (and why)
belts slipping (to water pump)
rad cores blocked (IR thermo gun it) ask
water pump impellers rust 1/2 gone?

all this assumes no coolant loss, if you have loss, tell where.,
where it leans
ground
passengers toes (foot well)
engine oil pan? milky oil
if A/T TRANS, check it for milky too.

I would look to the electrical side of the fan operation. You have three basic components to the cooling fan operation...the fan switch, the fan relay, and the fan motor. You need to determine what part of the system is not working. If you can run a 12V jumper wire to the motor and it works you know it must be either the switch or the relay. if you jump out the switch and the fan runs, you know it must be the switch.

You can engage from two wheel drive to four wheel drive at any reasonable speed though I find it's easier on the transfer case if you do that below 45mph. Lift you foot off the gas as you shift so the unit is not under stress. To engage 4 low, you should not be traveling faster than 5mph and then, only on slippery surfaces. When in that gear, it is not advisable to travel much faster than 25-30mph and never on dry ground.

change oil pressure switch it' should be near the oil filter

Check to see if the coolant level is low.

Sounds like your sending unit sensor - if it was your pump going out, your engine would be history by now. Rule of thumb, if your oil check light ever comes on, it's usually too late to remedy the problem. You have a major issue, but since you've obviousely drove it quite a bit since then and it still hasn't seized up, I'm guessing you're ok...for now. Since you took it to a shop and they said you're ok, I'm assuming they checked your level and visually checked for leaks and found nothing. Either, you've got somethijng partially blocking your pick-up tube for the pump which is in your oil pan, or a electrical issue with the sensor. I would start by having someone check the sensor out and go from there...good luck.

oil level is low you have a leak. or they didn't add enough maybe your oil pump is going bad causing low oil pressure.