Why is my 1988 Nissan ZX car overheating

Have the compression checked on engine,may be blown head gasket or bad head.

Thank you for getting back to me so quickly however I forgot to tell you that the person that did the work put in 2 gallons of 100% antifreeze and, he said, a quart of water. there was a mechanic from Nissan there helping him to put the timing belt on and he said that he went to the school for Nissan and they said to put 50/50 only, could this possibly be the problem as I'm having zero leakage and no noise car sounds good except when the temp gauge goes up then I hear sounds as if the antifreeze is boiling and comes out from the overflow.

Did you get my next question about using 100% antifreeze?

The antifreeze is ok to rum even 100% want hurt engine,have the clutch put on,if that is not your issue you may have head or head gasket damage.

I did this same repair to my 300 Nissan ZX 84 and ended up with a burnt out clutch fan due to the plastic fan guard no properly re installed it would be the thick round shape plastic liner that seeds up against the radiator housing my fan caught it and knocked out the fan clutch stopping the then all together and causing the engine to go into a sudden heat up. Surprisingly, this situation happened unnoticed though I didn't hear the fan blade catch as I was on the freeway driving at the time. I feel that it should have been a recall item because it is a very very poor design for Nissan

Thanks for the info Michael, I'll check that out also,

Was this overheating problem ever solved? I have a 1988 300zx that had every thing replaced for the cooling system, and still ran very hot. I replaced the Radiator cap, and that solved my overheating problem.

Thanks Mac, no, the problem still exist but I'm not driving the car at present, it's too hard and I'm afraid of doing more damage, I did buy a new radiator cap awhile ago that is not my problem, thinking about selling my baby and letting someone else get her back to new, just don't have the $$$ to keep up.

The problem with the Nissan 300zx is the head cylinder sensor. Something like the thermostat sensor ( not the thermostat) Replace the sensor and maybe the harness connected to it. It will cause the car to over heat in a way where the water seems like it’s boiling inside the coolant reserve tank. While the car is over heated it will probably even blow out the over flow cap on the reservoir tank. If you replaced the water pump/ thermostat/ hoses and etc.... then it’s for sure the coolant sensor ! I think it’s about 20 for the sensor and 20 for the harness. Give it a try!!! It’s what fixed the problem on 2 of my Z’s ( 1985 n and 1986)

It’s behide the Thermostat on the right.