I am having over heating issues in my 05 350z.

I personally thought because there was a huge hold in the bottom of the radiator overflow bottle meaning the coolant system isn't pressureized, but I ordered a new bottle and installed yesterday and it has a vent at the top.

So I doubt that is the problem.

I also replaced my oil pan yesterday with a larger one because the original one had a slight dent in it from an accident.

Swapped out all my oils with 10-30 mobile 1 synth, but what can be causing my 2005 350z base model to be overheating?

Thermostat?

I ran it for about 25 minutes a couple nights before I replaced these things and it started getting pretty hot. I didn't get it get into the HOT area on the gauge of course, but it was getting close.

Just need some typical reasons why 350z's may have overheating problems so I can dig around and attack those issues.

I have no check engine light BUT i do have a light that looks like a big U with a exclaimation mark inside of it sorta like this> [!]. That I'm thinking is the suspension light?

Any pointers to point a new guy in the right direction would be awesome.

Thank you,
ocZ

 

Get the Nissan 350Z shop manual and read the "CO" section. It will walk you through the whole process. I tried to post it here but the file size was too big. PM me your email address and I'll email it to you.
~~~~~~~~~~~~~~~~~~~~~~~~~~

(since you just did your first oil change........)

pm'd:
You should obtain a copy of the entire shop manual. It contains everything you will need to know, including how to troubleshoot problems, and fix them.

If you have a LOT of trouble understanding what is in the shop manual, you probably should not be doing the work yourself.

 

I would think it would be a thermostat switch or sensor. Are you fans runnung???? Have you done any mods????

 

More than likely it is an air pocket in the system somewhere. You just need to bleed or flush it and you'll be fine.

 

+1

He probably needs to bleed the air out of the heater hoses.

ocZ: Do you get any cabin heat?
.

 

thermostat

 

Same thing happened to me. This is what fixed it.

 

ya bleed the coolant system.

if i had to bet, i would say either a thermostat or somethign really easy like your fans not operating properly.

when you start your car and let it run, look under the hood on the back side of the radiator. are the fans spinning? if not its either a thermostat or a fan issue.

like someone else said, waht mods do you have?

 

Fans are running full bore when it starts to get hot, so it's not a fan issue.

I only have one mod which is a cold air intake system. I reset the battery after install of this.

Just by flushing my radiator does not bleed the actual lines does it?

I want to try to get this air pocket you are talking about OUT of my system tonight when i get home from work.

If that doesn't work, how hard is replacing the thermostat?

It looks like its WAYYYYYYYYY back there and whoever built these things must have had REALLY small hands.

Thanks for the help guys YOU ARE THE BEST!

PS- what is that upside wishbone light on my dash with the exclamination mark in it?

 

You need to obtain an owners manual....see attached file

 

Is flushing my radiator the same as bleeding the lines?

How would I go about bleeding the lines?

THANKS!

 

The water in the radiator is circulated by the water pump on the engine. It travels through many hoses, the engine itself, and a small radiator called a heater core in your dash.

Air can get trapped in any of these areas. I have heard (but not experienced) many members complain about how hard it is to get all the air out.

You might use the search feature on this forum to find other related posts.

 

there are 2 green ***** you can turn to bleed the system...you got air in your system

 

Where are the ***** located?

You've been incredibly helpful thus far, and I'm sponging everything up.

THANK YOU

 

To bleed take a phillips screw driver to the upper radiator hose right next to the battery.. You look right below the side of the battery where the hose is and you will see a plastic bleeder screw staring at you.. If you do not bleed the system correct you will bLOOOOOOW your engine!!

 

Also not really say its a must but.. When i upgraded to Nismo Thermostat my temps went from the normal 190-200 to 160-170 degrees......

 

Should I have the dealership bleed it?

I'm pretty confident, just never done before....

Thermostat from Nismo pretty inexpensive ya? Did you do your own thermo install?

Thanks Jon!

 

personally I would not bother with the NISMO t stat unless you do lots of road racing in high heat conditions - the car runs too rich with it otherwise (my car ran WAY better when I went back to stock).

Could be air in the system, but that is typically caused my making a coolant system related change. If you have not changed anything, then it may not be it

The other potential issue is excess burning of coolant, which can manifest itself in many different ways. First thing to check is to make sure your coolant levels are where they should be in the first place in the radiator. From there, bleed the system per the factor service manual, and beyond that, you might be well served to let the dealer handle it...especially if its an 06 car which is literally brand new

 

Actually, The vehicle I am working on IS salvage and the radiator support / radiator have been RECENTLY replaced (less than 100 miles ago I'm assuming)

I assume the brilliant person who installed those two parts before me did not bleed the system after doing so?

Just open up that **** after dringing all coolant, or open **** with coolant level full?

thnx for tips dude

 

You have to bleed it from the heater hose behind the engine to the right of the battery box if you are standing in front of the car looking into the engine bay. I found this out the hard way when i had to pull a header off.. You can not bleed it from the radiator cap or the bottom radiator drain. I tried..

You start the car let it get a little warm and unscrew the cap, have someone rev the engine up and down while you squeeze the top radiator hose. Then close the cap and and let it build pressure and do it again. I found from my experince you have to do this at least 3-4 times to get all of the air out. Also with that valve open you can put coolant in with the cap off. This should really be posted in the DIY section instead of telling people to download the fsm....