Water temp and oil temp
 

Hi All,

I recently upgraded to a CSF triple core rad and noticed water temp going past the 7th dot at the track. I didn’t have this before with the oem rad. I had it vacuum filled again with water and water wetter it still went pass 7th dot after 5-6 hot laps on a pretty hot 88F day. Could there be air pockets still? Driving back and forth on the street has no problem at all.

Thanks

I haven't had any issues with my CSF radiator. Do you have an oil cooler?

I have a 25 row oil cooler, oil temp seems fine. Just the water temp, once it passes the 7th dot to 8 or 9th I let off and it cools back down.

I would recommend you put Tracspec vents in your hood to get the heat out.

Yea I have the trackspec vents too. Started having this water temp issue after I put on the hood vents, Z1 CAI and upper plenum, CSF Rad and no thermostat now. My tech bleed the system again and made sure no air pockets lock in there(?), could it be the intake and plenum causing my car to run lean and hot? I checked the fans are running fine too and I dont see a coolant leak anywhere.

Put the factory thermostat back in. Get a new one from Nissan. Not some aftermarket junk. Why did you take it out?

My mechanic took the thermostat out to see if that will help. I dont have a legit temp gauge yet but I guess you are not suppose to pass the 7th dot on the dash gauge?

1. 0-132°F
2. 132-138°F
3. 138-143°F
4. 143-149°F
5. 149-152°F
6. 152-158°F
7. 158-222°F
8. 222-228°F

Airflow through the Z's engine bay is pretty crappy. If you already have track spec vents an additional two holes on top of the existing opening will allow a lot more additional air in onto the radiator. I never did it personally but it helped with other boosted 370s.

After my turbo install I hit 240 before popping the cap release. But I don't think the CFS radiator is any better then OEM, it might even be worse because it's prone to leaking.

I have reinstalled a new thermostat and bled the system again to try. I am already thinking to put the OEM rad back on if this doesn’t work out. You’re right, thumbs up on the trackspec hood vents I dont feel too much heat from the engine bay just the rad acting up. Also switched to a richer cooler Uprev map to see.

Nothing wrong with the CSF radiator. I have one and have had no issues. It's hot as can be where I live and no issues.

7 Dots is around 175F to 185F on my SpeedHut water temp gauge. I have the sensor in the upper radiator hose.

Rusty,

Do you have notes on the temp. range you've found each dot represents?

#7 leaves a lot to be desired with such a large range in this list.

The highest my Z has ever been was 210F, that's the 8th dot. Where my sensor is located at in the upper hose. It don't reading until the thermostat opens up at 7 dots. Which is around 175~180F. I'm planning on moving the sensor this winter.

I don't think these dots:temp are accurate....
The thermostat STARTS to open at 76.5C / 170F which is 7/8 dots... Wouldn't you think your engine is too hot if it was at 7/8 of a temp gauge?

From testing I have done on the G37, the temp gauge is at about half way with coolant temps of 70-105C or 158 to 221F.

Good info.

For comparison's sake, I'd love to see a list from anyone who has recorded a per dot range with an aftermarket gauge including the sensor placement like 2011 Nismo#91 posted earlier in the thread. I can do one with ECUTEK but I'm not sure of the OE sensor placement nor accuracy as it's probably derived by the ECU.