Is your GTR having a unreasonable water temperature now? I have encounter this before and now I would like to point out those possible things which will cause this happen:
DO THIS FIRST:
- Check the radiator caps and all the coolant hose whether got leaking before do anything below.
- Radiator, your radiator maybe clog and is time to service. Bring your car to the workshop ask the mechanic to do a radiator service. They will pull out your radiator and fully flush.
- Radiator fin, have a look into your radiator fin, is it bend? If MAJOR part of the radiator fin is bend there will be a possible reduce air flow through the radiator and cause the water temperature increase. If this happen, ask your mechanic to re-alignment the radiator fin.
- Change water coolant if necessary. Redline product or Motul Mocool is good enough. And make a request to your mechanic by fill in the radiator with distill water ONLY.
If problem still remain after you did what I mention above, then you have to check this:
- Check your fan whether in good condition. You can do this by remove the fan shroud/cover, then turning your car off and see how fast the fan stop, if your fan still spinning for 2 second or more after car shut down, then your fan clutch is time to go. Usually this is less possible to happen because the fan clutch is quite durable.
- Check water thermostat whether still in good condition. If necessary to change, go for NISMO! The best thermostat ever which start to open at 62C(OEM thermostat open at 76C)~
- Lastly, the water pump. May possible your water pump is time to go~ If talk about water pump, nothing can beat N1 water pump!
By the way, there are few factors will cause HIGHER(not unreasonable) water temperature:
- Thicker radiator featuring with OEM clutch fan. Is good to change to aftermarket clutch fan if you are using very thick radiator.
- Without fan shroud. I believe many Skyliner don't have this due to aftermarket radiator setup. Anyway is good if you can get one~
"My problem: When my car was cruising, water temperature is normal but when stop at traffic light or idling, the water temperature will slowly raise until to 107C and it will continue to increase if your car still idling!!
Solution for my case:
-Service radiator
-Re-alignment radiator
- Change water coolant (Motul Mocool)"
Hopefully this reference can solve your problem~
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