over heating issue (40th 370z TT KIT)
 

Hi everyone , my name is moe am a new member in his forum ,and am a proud owner of a 370z 40th annivesary GTM twinturbo kit 1 .i bought his car and shipped it over seas from a close friend of mine , it arrived today,i am very well expereinced with high performance cars , so having a car at 469whp on a mustang dyno wasnt so WOOOOW , but i loved the drivibiliy , but still spools faster than anything i saw in my life and the power is almost there when you need it , finally gettin to the point , where i am it was 100f today its not that hot it reaches 120-130 f , i wasnt driving hard on the car or anything, and parked in front of the house with the ac for 15 min i saw the gauge and its 3 dots passed middle so it was 2 dots behind the HOT , i was surprised because the coolent level is checked , new with waterwetter , meshimoto thermosate and hoses , and the car has around 8000miles and the build has 2000miles or so ,the car still smells new , is this normal ? or do i have to think of changing the radiator also? but am surprised because am sure it gets 100f in the USA and no one every mentioned temps going passed middle , ohh the oil temps around 205-210 max , all help and feed back are appreciated , plz excuse my english since its not my first language .. thank you , and GOD BLESS GTM hehehehe :)

P.S PLZ DONT TAKE THIS AS A COMPLAIN ON GTM KIT, THIS IS ME ASKING FOR KNOWLDGE ONLY ,the car is one the best i drove in my life , and i am on the way to build a stage 2 or higher infinity with the help of SAM once i see how good this kit is in our hot climate.

Could be air in the system or the new thermostat isn't opening fully.

i dont think so , cuz when i drive around and stop for 5 min or so if their was a problem it would have heated up when i stopped fot these 5 min also , the thermostat has been checked and the car was left on for a long time and nothing happened.. i checked fans all were on

Definitely not normal. Given that your oil temps are 210F or so, this is purely a radiator/coolant system issue and not an overall cooling issue.

I'd start by checking the coolant level when the engine has cooled down. When you remove the radiator cap, it should be pretty much filled to the brim. Also, your overflow reservoir should be between the Max and Min (fill to the Max when you're sure the rest of the system is full). If both of those levels check out, there is an air purge valve at the top of the radiator, passenger side. Have some towels ready to catch overflow, and then open the screw to the purge to ensure there's no air in there. If no coolant comes out, pour coolant into the radiator fill spout until there is overflow, and then close the purge. Run the motor for 5 min, shut it down, let it cool, and recheck the level in the radiator spout. Fill to full again.

If all that checks out, then you may have a bad water pump. Any CEL or codes when you scan the car?

The water temp gauge is ALWAYS one dot below middle once the car comes up to temp. It's also a terrible gauge and doesn't budge from that LED unless temps are WAAAAY off normal. You should be able to read exact coolant temps with a ScanGauge or similar to know where you really stand. Keep us posted.

This car is currently running DISTILLED WATER / and AN ADDITIVE to replace factory engine coolant. Could that be the reason why is doing this? There are no CEL's or anything.

100 degree weather is very common in the states, You have a mechanical issue, It could be as simple one like system is low on fluid or a bad thermostat all the way to major problem like a head gasket . For the car to over heat while it is idling, Its is defiantly a mechanical problem.

Best of luck

Sam

yeah, you check if your fans are running properly? coolant levels?

Also, changing the radiator is not a bad idea anyway IMO.

well guys , i stayed in the car at 9 pm its cooler than the afternoon weather ,with ac on, and the temps stayed in the middle it was before the mid in one dot and after 5 min to an hour it stayed exactly on the mid,hmmmm
the car is perfect maybe it was just too hot , i dont know

so i guess their is no mechanical issue , but i might try taking it to the dealership and let them check it all out and replace the coolent with our coolent that sell here and our thermostate maybe just maybe our thermostate for the middle east wether is different than your stock ones, and better than the meshimoto thermostat,

SAM their is no headgasket issue cuz the car is fine when the weather is cooler, wht i noticed is the temprature montior is stuck or something cuz it stayed on 100f (37c) all the time and at night it was 99f which is abt the same but actully i am 10000% it was colder than that and i am sure it was hotter than 100f , maybe around 110-115, and i made sure by goin in a different car and the temp monitor says 26c , so for sure the monitor is crazy or maybe still not used for our crazy temps hehehehe its goin like---> WT*** IS THIS heheheheheh

i might try the idea abt checking the air in the radiator sounds somethin fun to do or i might just leave it as is til i get it to the dealer ship and let them deal with it .


P.S guys i just wana clear out the issue that i shared with with you ppl has nothing to do with GTM KIT or anything like that , i wasnt pointing at anyone, i am just sharing with u my wht happened , and although i am 1000000000 miles and dont know GTM personally , this kit is the best TT i ever tried in my life ,words cant express wht i wana say ,u will only find out when you try it and only when the wastegates are open :tup: all i need is more power , i need more..

thank you for replying back to me so fast,i never thought id be welcomed like this .:tiphat:

Hmmm, interesting that it maintained normal operating temps when the A/C is on as both the primary and secondary fans are automatically activated when you turn the A/C on. The primary fan should cycle on and off without the A/C on, but if it doesn't that could cause overheating.

When it was overheating, did you have the A/C on then too? Have you checked the oil for any evidence of coolant?

when the ac turned off it cooled down abit, but icouldnt stay much longer so i left it was too hot , but i cant say that its overheating but i dont know where will it stop if it would have !! i saw it jumpd 2-3 dots passed the normal range when i saw that and i turned off the ac to see wht will happen , and it cooled down so i switched the car off .

later at night i did the same thing with the ac on for an hour and nothing happened . it was in the middle all the time .it means nothing was wrong
but the qustion here is !!! why did it jump 3 dots then ? was it because it was too hot ? is it true the all twinturbo cars are not ment to be in very hot climates?? or is it a technical thing that comes and goes!! but still it wasnt tooooooo hot we are still in april , the max it could have gone is 38-39c , in august where am from it reached 55-60c EAZEEEEEEE:bowrofl:!!
that means i cant even ride the car no more , so something must be done and checked , if u read u will notice i already changed a couple of stuff , but maybe i need to do some other check ups and changes .
ill keep u guys updated so all of your guys in hot climates know whts up:tup: .

ohh and i checked the oil , their is nothing wrong , pure oil, the collent reservoir is a bit low but not that low , the radiator cap was full when i took the cap off , so i might try to do the air check thingy someone advised me to do , then i might stop getting into a mental status and just spend money and give the case to the dealer to check it out and give them this :icon18:

from your location i take it you are in the middle east. if im not mistaken all the Z's shipped to that area had much more robust cooling systems. oil cooler, powersteering cooler ect..... just an idea....

Did you get this car in Northern Florida by any chance?

Could be the exact reason for problems especially if he didn't use enough water wetter. I know one bottle is enough to make a difference on a normal system, but you need a couple if i remember the chart correctly to make a difference on a car running pure water.

Raul, he bought it from me...

the car is perfect now,someone advised me that it takes some time for the new coolent to be runnin properly and the air gets 100% out , so wht ill do is
wait for sometime and see wht happens, if the problems occurs again,i will start by changing the coolent to a normal coolent liquid(mobile) for example andsome water wetter or something like that and make sure the air is out,ill
also install a new CSF radiator just to be in the safe side,ohh by the way ,yes i am in the middle east, and the car does have 2 oil coolers thanks to the owner of the car that didnt spare anything to make the car so damn
good, the best guy to deal with period.

i tried the car today at 6pm , it was 32c, hot night, and its perfect , but didnt stop for a long time , but regardless ill do wht i mentioned above.

ill keep u posted on the outcome when i change the coolent and radiator
so all of us know who are in hot climates should do it as well and not run distlled water, although i dont think thats the issue/was the issue , but we will see :stirthepot: , thank u all for sharing

Thats what I thought, but I didnt want to say your name.

Yes I did , :driving:

I had a issue just like yours. Thought the car was over heating when it really wasn't. was the temp sensor the dealer said. they replaced it and never again happen. At night or with the weather cool it would work fine but when it got hot out for some damn reason it would stick or do what ever it's not sapose to do lol maybe check that

maybe your right bro !because or some weired reason it says 34c or 36c since 2 days now and doesnt come down or up !!although its so cold out it was 34 or 36 in the morning but now its 1am our house temp reader says 23 and the car says 34 i said maybe cuz the car parked under the sun so give it sometime , so i drove it around and around and the bugger doesnt change !

it would be a good idea to start getting the cable to start reading the ecu and diagnose everything .but damnn man i just got the car so i dont wana go and do this and that and this and that , it will take the fun out of it , my only reason that i bought a GTM tt kit on a 370z is the reliability and the almost no issues found in them , not like other kits , over heat, leaks,weired noises,boost leak etc etc , so til now i am having 0 issue and even the issue didnt occure again , but i cant really say because ive been driving at night only , i am on vecation so am enjoying my vecation sleeping in my bed all afternoon :tup:heheheheheh

but all i wana say guys i wish everyone can listen to my advise, if you dont have a gtm tt kit u wont understand the meaning of this is how it supposed to be out of the factory period !!!!

wht do u guys advise in terms of servicing the car always and taking care of it , oil,plugs,coolent etc etc change these in time , wht else do u guys advise to be checked every 3000 miles or so ?

Where in the mid east are you btw, I keep thinking Qatar just cus of q8

q8 sounds like Kuwait to me... Just in case I didn't detect the sarcasm.

Hah. I didnt even put that together! Makes sense now. Haha thanks. Whoops

lol..........you're crazy Dai

yo Rob. Respond to your PM! from like 4 months ago. Also, i guess your deployment date got moved? Thats good right?

The outside temperature gauge has nothing to do with the engine temperature gauge. The external temperature gauge gives faulty readings when it is moved from its stock location, i.e. to install a intercooler or an oil cooler. It needs to be in direct fresh air several inches away from other hot components.

The engine temperature sensor (coolant) is threaded into the water outlet piece. To find it, follow the hose that goes from the radiator cap towards the engine, away from the radiator, the piece that you arrive at is the water outlet pipe. Move your hand a couple of inches to the right and you will see the sensor with wires sticking out. The sensor is fairly fragile, so if there is a chance it has taken a beating I would just replace it. A new sensor is $25.

I am running gtm stg2 on my car and am in Dubai. So u can say it's the same climate, and yes I agree with u, by far one of the best kits specially wghen it comes to those small components like clamps and rubbers... All top notch.

Anyways with regards to ur issue, I had the same problem till I blessed the system proerly and I can drive it on summer withalmost 48 to 50 degree's without any overheating issue... The only overheat issue am facing is when when I push it all the way to redline from 2 to 5 ... The more I get into gears the temp goes up but once I let of the gas pedal or sto the temp goes down quickly,!!!! Can't figure out why!!!!

Use a nismo thermostat. And make sure to get an oil cooler.

Again bleed ur system properly and I guess ur issue will be solved.

Klm
 

Well yes guys q8 is a short cut for Kuwait :tup: and maybe ur right abt the sensor being faulty I'll look into that later , and I did change the thermostat and coolent and added an additive as well , I have no issue going in wot wht so ever , the issue only occurred when I was stopping for 15min or so , it went 3dots above normal , but it never did it again , am on the process soon to change the radiator , and do some bleeding and maybe change the coolant as well although it's brand new , and I will give it a try again when it gets hotter in the 40's or 50's and I will let u know . By the way who ever is in Dubai wht coolant did u use ? Thanks

By the way I have 2 oil coolers thats why oil temps are amazing in any condition

Maybe you have air in the coolant lines, used to have this problem in my 350 turbo back in the day.

My bad man. I have been pretty busy preparing for this deployment. Looking like this summer now. I am working a deal for a TT install and maybe some wheels. Sorry for the off-topic...............

well the problem didnt happen again , but i really didnt go out the same time at the peak of the heat at 12-1pm since that day , but if their is a problem it should happen all the time not at a specific weather? right ? now the car is perfect , but ill also do wht everyone suggested and keep u posted soon.

regardless of all of that ,driving this car once a day and goin on wot makes u forget any issue/problem in the world , hehehehehe

you wont believe how good this kit it is , no matter how many turbo cars u have been in , this kit and the car togather makes something words cant express , but the smile on your face will express alot once u drive it , i cant wait to see your reactions after u do the installing and everything . best of luck :stirthepot:

:iagree: No lag, just BOOOOST! I'm wondering how it will feel with a 4.5l stroker kit... hmmmmm... might have to start looking for a HR3.5L block to get built.

its not only abt laag , its abt everything , power,sound,looks, everythin togather makes a specific packege that is music to your ears and makes u feel like you have been unborn :yum:
do u still have ur TT 370z ? i like wht u did with the bumper , did it really make a big difference ?

What would be considered a normal temp. range for the HR and VHR?
I know newer engines are designed to run a little hotter for emissions and efficiency reasons but how much higher are we talking?

well the issue is gone , it happened once it was 3 dots above normal, and the only explaination is since the coolent system was added new with distilled water and waterwetter so it wasnt runnin properly and their was little air , i didnt bleed it or anythin just kept on driving it around the block,and today i looked and to me i think the coolent is working propely and i checked the pressure from the valve and it didnt push out any air just water , one of the guys in the forums advised me , and found it after the system worked propely the car needed half large bottle of water of disttled water to add. so problem solved . it was just a matter of time and little air in the new system ..

guys does any know who's car is this? its for export only ? and i never saw it before ,the kits looks like GTM KIT ,and it has many extras as well , its not your ordinary person, but why would a person wana export a car like this after spending so much money ! the price is on the low side as well , or in other words amazing price ! if its working properly but to me its clean as hell , look at the tread on those NT05'S YUMMMMY

2008 INFINITI G37 JOURNEY/SPORT COUPE Pictures

well i figured to update to u like i promised i know it has been long but i didnt have time , we took the car to a mechanic and checked everything , all looks good and everything , we bleeded the cooling system and made sure their was no air , also we found out the ac pressure is low around 250 so we made it 550 exacty like the green sticker when u pop the hood , anyway i ordered an upgraded radiator , i want fans but i didnt know where to get one , and gtm site doesnt give u a price when u click on the item there , so i got a CSF radiator with shrouds for our heat which is reachin 115-120f , the only issue which is pissing me off and i have no clue why this is happening , so when i drive and their is no traffic , the ac is flowing fine and flowing cold air , as soon as i get in traffic and it heats up a bit , the ac flows HOT AIR as if i switched the ac off , i tried everything and it seems everytime it heats up it goes on limp mode and switches off the ac automaticly, and when i drive off after i sweat my as* off it gets cold again , i check the oil temp and coolent temp everything seems normal around 220 oil temp and the coolent temp is either on the half mark or one dot pass it which is fine ,

am started to get pissed off ,am tryin to convince my self that when i change the radiator and the coolent system gets better the car will not go to this limp mode , fingers crossed , all help is appreciated !:mad:

anyone ? plzzz:shakes head:

yes, the car shuts down the a/c if the coolant temps reaches a certain threshold , its a safety feature to try and save the engine from overheating. i would think about getting the stillen front bumper move both oil coolers to the opening on each side. Get 2 little fans mount them on the inside of the oil cooler, have them wire it up so when the cooling fan engages it will activate the fans. I dont think you need an upgraded radiator as the factory is fine. also get an oil pan spacer to allow you to hold 1 more quart of oil. finally, only run straight distilled water, as this transfers heat the most efficiently.