New to ZJ and i have a wee problem with overheating.
Ok. so i just bought this 94 grand cherokee limited with the 5.2 a month ago. and just this week it started overheating. first i noticed that there was coolant bubbling out of the overflow, usually after shutting it off. and yes, it was still boiling in the reservoir. but other than that just that it will come up to temp really fast and eventually up to the redline while at any speed including just idling.... it's been a long long time since i've done anything cooling related. there's no leaks that i can detect, just from the cap of the reservoir. the fan is indeed working, and the rad isn't blocked/bent fins. this leaves me with three things that i can think of. a clog, water pump, or thermostat. or even a combo of all three. are there any symptoms that would show for any of those so i know what part to order and replace/fix? would like this fixed asap as its currently the DD.
thanks for any and all help