OVERHEATING problems...

[K240]

PLEASE READ THE ENTIRE POST! I am so pissed...my 240 has been overheating....I have been noticing the signs that my car has had a blown headgasket...I called the shop where i had my car done, to see if it was done. They said it is donje, but is still overheating.....I dont know what else it could be, i have all new cooloing system...what else could it be? here is what i have done-new Headgasket/resurfaced head/valves -new radiator, KOYO but not aluminum-new water pump-new thermostat-twin flex-a-lite fans wired up to the fuel pump-new radiator hoses-new radiator cap-flushed and bleeded system-I also have the stock mechanichal fan being used, w/ the twin fans....

edit- PLEASE HELP!!!

[K240]

oh btw i have a 93 240sx

[s13sr20chris]

try a new thermal transmitter. its the little one wire sending unit next to the regular coolant temp sensor. i think its like $10 from the dealer. try to get it from one of our sponsors like pinnacle nissan. its a cheap part and i have seen them read hot when the motor is not hot.

[K240]

ive replaced that too. =[

[s13sr20chris]

have you verified that it is in fact overheating by popping the hood and checking?

[K240]

yes.

[K240]

any one? NISTECH?

[K240]

My mechanic is stumped too...=[

[s13sr20chris]

well, if it is indeed overheating and all the above stuff is fixed...i dont know. you have kinda done everything. are they oem parts? i had a freind who got a water pump with the impeller on backwards. i have also seen many name brand(big names too) aftermarket thermostats that are no good right out of the box.

[K240]

the thermostat is OEM. The water pump is from autozone...My timing has been advanced, could that have anything to do w/ it?

[K240]

any one?

[psychic_mechanic]

Random ideas to all cars, may not apply to 240's:

Fan shrouds/airflow through rad, not aroundare fans working together or fighting each other?clogged cooling passages in head/blockverify gauge is accurateradiator capset timing to stock, just to checkchemical flush cooling systemwater wetterrunning lean?

[K240]

it was the radiator, it was a 1 row, instead of a 2 row...