1989 nissan 300zx the coolant is coming out of the overfill reservoir and steaming everywhere. Added coolant and water to top off, and I let it run in park for about 5 minutes with no steaming. Started driving, I got about 6 miles and on the freeway and steam was coming up out under the hood. Fan clutch, hoses, belts, all fluids are good. Thinking it is either water pump or thermostat. There has been a squealing sound and it only happens when the heater is turned on and until you get up to 35 mph it stops and that did not start happening until alternator was changed 5 months ago.
I have newer timing belt, radiator and serpentine belt all done with in the past 12 months and the squealing which I thought was a loose/worn belt at first, but tension and pulleys are good. Someone told me that it could of been a possible symptom of the water pump bearings starting to go. Not sure what else to check that I maybe overlooked and appreciate any suggestions. Also how would I get the water pump off? It is behind the fan shroud and also is that where the thermostat is at? I am going to also make sure there is not any air pockets, but I doubt since I never had this steaming issue until yesterday.I do the majority of the work myself and I just bought the water pump and gasket and thermostat since if I have to pull any of it off, might as well replace these items, though when I did the timing belt last year,
I replaced the thermostat which is a lot cheaper than water pump and the water pump was fine and still could be for all I know-no leaking water anywhere under car or settle on the area where it is in car, so I hope you have a idea what I should do or check next since I really can't afford to take the car in to be fix for every problem and I normally ask online and read forums for information and troubleshooting tips since I have no car guys(father, brother or boyfriend and I'm not being sexist)in my life that work on cars even as a hobby. Thank you.
Thursday, June 14th, 2012 AT 11:50 PM