So I noticed my radiator overflow tank has about a quarter more past the MAX level.. Wasn't like that a few days ago. My car has been getting hot the last few days.

Can anyone point me in the right direction?
I'm getting rid of my Z, but I wanna at least try to fix that before I handed over to someone else.. Don't wanna be that ******* that sells a dream to someone then they end up in blvd of broken dreams.. Haha..

It hasn't overheated.

 

Sounds like you have a blockage in your cooling loop somewhere. Can't think of any other reason why you would have MORE fluid in the reservoir than before. Haven't seen this issue myself though I am interested in the resolution.

 

Yeah this is roving me crazy. I'm scared to even drive it a few blocks.
Just took it to the shop , there gonna do a radiator flush. If that doesn't fix it they said it might be a stuck thermostat.

I recently painted the plenum on my car and had to disconnect some of the hoses, and there is one on the back of it that let's antifreeze go through I think, just noticed right now that it's leaking from the top. I don't think I tightened the fastener enough and didn't put it to the top .. Fackkkkk this is becoming such a pain Hahah .. 😰

 

Sounds like some air has entered into the system - you should have mentioned in your first post that you removed some hoses. There are threads here describing how to properly bleed the system. A non-Nissan specialist shop may not know how to do this properly.

 

Yeah sorry for not mentioning that on my first post, I did unplug the plenum and it has a coolant hose that goes to it.
So I tightened it up now, and while I'm driving my car starts overheating just a few blocks down, luckily in front of a radiator shop.

It only went up a quarter up from normal. But then it went up a bit higher. Turned on the heater to get some of the heat from the engine. But I got cold air. ??? ...

They opened up the bleeder cap, and filled up the radiator, then took it for a drive and it started to overheat.

Then the mechanic went for a spin with me on the passenger side and it didn't overheat on him. It stayed at level.

But now while driving home the fans stay on.. With AC off.

I'm loosing my mind.

Could it be the thermostat stuck?

 

I've already told you air is in the system. There are threads here you should have searched for by yourself, but here's one to read:

https://my350z.com/forum/forced-indu...nightmare.html

 

It's either an air bubble or a bad radiator cap.

 

Thanks for the link, gonna try n do it tomorrow.. Hopefully it works.