I have an 89 300ZX non-turbo that is overheating after about 45 min of running. I have changed the radiator, fan clutch, upper and lower hoses, thermostat and still nothing. I don't get any heat out of the heater either. ANy thoughts? Some told me that if I had a couple of bad injectors that it would overheat. Thanks in advance for the help.
WOW. That's pretty harsh. Is there any less extreme way to fix this problem? Will a back flush or other procedure work? Don't know if the cost of "Ripping her down" would be worth it.
Hmm. Take off the radiator hoses and pull out the thermostat and let it run with fresh water (from a hose)go through it. It worked for me but mine wasn't a big blockage. Do the same with your radiator. Try that
Well the continuing saga of the 300ZX overheating continues. It now apears that the only unchanged part in the cooling system is the water pump. We have determined that there is no water circulation or very poor circulation. While this might very well be due to clogged engine ports, the water pump is an easier task then ripping the engine open.
That being said, we started disasembeling the front end of the motor. The question we now have is that to get the lower timing belt cover off you have to remove the pully assembly off the crank. Is this correct? If so, is the pully slid on with a keyway or does it need to be pulled off with a puller.
At least it ended well. 
Linear Mode
