280z overheating. Need Help
#1
280z overheating. Need Help
I have a 77 280z with the original motor and radiator and recently I recently been having overheating issues. It doesn't overheat at idle though. Its only when I'm driving.
So far I have installed two 12 inch pull through electric cooling fans (run off switch, not thermostat), coolant temperature sensor, and tomorrow I will be replacing the thermostat. I am out of ideas for what to try next and need some help. I find it very odd that it doesn't overheat at idle no matter how long its idling for.
Also would a 160 degree thermostat be better than a 180 degree one? Thanks in advance.
So far I have installed two 12 inch pull through electric cooling fans (run off switch, not thermostat), coolant temperature sensor, and tomorrow I will be replacing the thermostat. I am out of ideas for what to try next and need some help. I find it very odd that it doesn't overheat at idle no matter how long its idling for.
Also would a 160 degree thermostat be better than a 180 degree one? Thanks in advance.
#4
Be very careful when removing those water pump bolts. If you encounter any kind of unusual resistance, use something like PB Blaster to help those bolts come out without breaking. Sometimes they're beyond help and then you're pulling the timing cover as well.
Get a set of new bolts no matter what.
Get a set of new bolts no matter what.
#6
Be very careful when removing those water pump bolts. If you encounter any kind of unusual resistance, use something like PB Blaster to help those bolts come out without breaking. Sometimes they're beyond help and then you're pulling the timing cover as well.
Get a set of new bolts no matter what.
Get a set of new bolts no matter what.
Bolts broken when being removed ...
Lead to disassembling the timing cover to get at the stubs still in the block.
Even if you are lucky and your bolts don't break, they'll likely look like the ones in the first photo. Glad you're going to replace them.
#7
Got the water pump out without breaking any bolts!! I replaced it but the overheating issue is still happening but its not as bad. I ordered a radiator and I will be picking it up and installing it tomorrow. When I removed the old radiator, a lot of the fins were bent and prevented air flow as well as lots of debris stuck in it. Also there was an A/C radiator type thing that I removed because my A/C doesn't work anyway. Removing this should give me even more air flow. Hopefully the new radiator fixes it.
#8
Congrats on no broken bolts. Glad the new water pump gave you some improvement. Fingers crossed the new radiator will take you over the top and give you a motor that runs at the temp it should.
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