My SR Runs hot on the highway. Why? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

BlackTruenoAE86 · 03-10-2007, 10:42 PM

I have had my SR powered S13 for a month or so. For the first time this week I have been taking long trips on the highway and started to notice that my temp gauge is going up two lines after a long period of time! Which makes no sense to me because the cars temp is perfectly fine in bumper to bumper traffic even down town. It only happends when Im at a constant rpm on the highway. I have a Godspeed front mount intercooler, stock boost. KA Radiator running with a Taurus fan. Can some one give me some insight. This is getting on my nerves.

Thanks,

WILDACEX187 · 03-10-2007, 10:55 PM

when u turn on the heat all the way does it help? sounds like the thermostat is getting stuck closed maybe.

Gumballf355 · 03-10-2007, 10:56 PM

Your electric fan could be wired backwards... check which way the air blows when it's on... I bet that's it. It happens sometimes to people who don't pay attention to how they connect the fan. I've seen it a few times.

BlackTruenoAE86 · 03-11-2007, 12:25 AM

The heater lines are not hooked up. I might take out the thermostat and see what happends...

The fan is pulling in the correct direction, i made sure of that...

Thanks any other ideas?

JJ240 · 03-11-2007, 05:42 PM

Check your coolant level. If its slightly low that will cause spikes on the highway. If it seems just a bit low check the weep hole on your water pump. If there is any coolant leaking out of the hole your water pump is bad.

chmercer · 03-11-2007, 06:13 PM

maybe your water pump is jacked

do you have a real temp gauge or the stock one

make sure you have a real one

WILDACEX187 · 03-11-2007, 10:14 PM

yea go through sum steps. start from easiest which would be to check coolant level, then do a thermo and then waterpump

Wei240 · 03-11-2007, 11:05 PM

yeah...
i'd invest in a real temp gauge...

mobilesuit818 · 03-12-2007, 01:51 AM

Most likely it your thermostat.
I would just take it out, and let it flow,

WILDACEX187 · 03-12-2007, 08:58 AM

Quote:

Originally Posted by mobilesuit818

Most likely it your thermostat.
I would just take it out, and let it flow,

this is the WRONG thing to do. get a new thermostat. i recommend nismo

wootwoot · 03-12-2007, 02:46 PM

Quote:

Originally Posted by Gumballf355

Your electric fan could be wired backwards... check which way the air blows when it's on... I bet that's it. It happens sometimes to people who don't pay attention to how they connect the fan. I've seen it a few times.

Doesnt matter on the highway at 70mph

DO NOT FUCKING TAKE THE THERMOSTAT AND LEAVE IT OUT. That is really dumb and will not only make your car take forever to warm up but it can sometime never get all the way to operating temperature. The coolant will be flowing to fast through the motor not allowing the heat to transfer to the water enough. God some of you motherfuckers are dumb. You think Nissan would put that piece there if you diddnt need it? They want the car to have as little shit as possible, why would they put it there for no reason?

OEM thermostats only...I've seen bad stuff with no name brands.(Nismo IS OEM!!!!! I think its the stock thermostat off of a vg30dett or a rb26dett)

to check your water pump look at the weep hole. if there is any fluid that has spilled out (residue on the metal) get a new one

mobilesuit818 · 03-13-2007, 01:46 AM

Quote:

Originally Posted by wootwoot

Doesnt matter on the highway at 70mph

DO NOT FUCKING TAKE THE THERMOSTAT AND LEAVE IT OUT. That is really dumb and will not only make your car take forever to warm up but it can sometime never get all the way to operating temperature. The coolant will be flowing to fast through the motor not allowing the heat to transfer to the water enough. God some of you motherfuckers are dumb. You think Nissan would put that piece there if you diddnt need it? They want the car to have as little shit as possible, why would they put it there for no reason?

OEM thermostats only...I've seen bad stuff with no name brands.(Nismo IS OEM!!!!! I think its the stock thermostat off of a vg30dett or a rb26dett)

to check your water pump look at the weep hole. if there is any fluid that has spilled out (residue on the metal) get a new one

Wow, you must be someone important, You should learn to calm down, and writing in caps is so over-rated like power steering and power windows.

I think you should take your thermo out, cut out the middle part of it so all you have is the metal case, put it back in, with out the middle portion, and viola!! You have restriction, yet it flows like a 3 inch exhaust.

If your car is overheating on the freeway, it simply means that your hot coolant is not being cooled down, and most likely cause its a faulty thermo maybe your stuck in 1st gear.

Dont waste your money on a nismo, or even another thermostat. Youll end up having the same problem when your thermo goes bad again.

Your car will never over heat ever again.

Nissan had placed on there for you people that dont let your cars warm up for a few minutes in the morning.

aznpoopy · 03-13-2007, 01:49 AM

hi.

thermostats are important.

they are also very cheap and very easy to replace, even if you buy oem. no reason not to replace it. there's absolutely no need for a ghetto solution.

mobilesuit818 · 03-13-2007, 01:14 PM

Quote:

Originally Posted by aznpoopy

hi.

thermostats are important.

they are also very cheap and very easy to replace, even if you buy oem. no reason not to replace it. there's absolutely no need for a ghetto solution.

IMHO, if you reside in a warm climate like TX/CA, it would only help you if you perform that thermostat mod.
I rather have my motor run a lot cooler, than hotter.

You can try the thermo mod, and if you dont like how much cooler your car runs, then put another thermo in there. Simple solution, not ghetto.

s13speeddrft · 03-13-2007, 03:09 PM

No it is a stupid solution and very ghetto. Just like other people said the [U]engineers[U] at nissan would not have put one on there if it did not need it or helped it out. Stupid people like you that half ass their jobs should not work on cars. To the original poster try replacing the thermo and see if that helps.

wootwoot · 03-13-2007, 03:26 PM

OK. Not running a thermostat can make your car RUN HOTTER. It will not show on the temperature gauge as well since it measures coolant temp, not the heat of your head/block

All fluids have a heat capacity, for that heat capacity to be reached the fluid cannot travel to fast through the motor, or it will not get warm causing your shit to run hot. This isnt his problem, but this is what will happen if you take your thermo out. If you run to cool, you will not make optimum power and your car will run like shit.

The taking out the thermostat and runnning a restrictor in there would work but why the hell would you do that? Thermostats arent complicated. Fucking backwoods mechanics.

mobilesuit818, if you talked me like that in person I would probably bitch slap you to demoralize you. I have to talk in big letters in here because people do not know how to read and I have to help them by making it easier for them to comprehend it

tenmou · 03-13-2007, 03:40 PM

Is your fan wired to a toggle switch or a thermostatic switch? If it's the latter it might not be triggering/and or is installed improperly, causing you to over heat on slightly uphill sections of the highway.

mobilesuit818 · 03-13-2007, 04:02 PM

Call me ghetto, or whatever names you squirts can come up with. This method has worked for me and other cars that I have worked on and has never failed.
I was trying to recommend a method of troubleshooting, and not a long term solution.

Let me repeat myself for you ladies.

This has worked for me and other cars.

Its pretty funny, that you guys think your are straight up mechanics (no pun intended for the real mechanics out there). If you want some type of validating that you guys are in fact "know what you are doing", here you go.

You guys are all winners to me!!

I am done with this post. You guys can do what you want and I hope you dont get taxed by real mechanics.

Once a poser, always a poser, and dont get it twisted.

boozels · 03-13-2007, 04:09 PM

Quote:

Originally Posted by wootwoot

OK. Not running a thermostat can make your car RUN HOTTER. It will not show on the temperature gauge as well since it measures coolant temp, not the heat of your head/block

the temp of the head/block will cause you coolant temp to rise if it didn't how would we cool it and dissipate the heat?

Quote:

Originally Posted by wootwoot

All fluids have a heat capacity, for that heat capacity to be reached the fluid cannot travel to fast through the motor, or it will not get warm causing your shit to run hot. This isnt his problem, but this is what will happen if you take your thermo out. If you run to cool, you will not make optimum power and your car will run like shit.

I know a grip of people that had overheating issues in the summer time. They did the thermostat mod or took it off and now it does not overheat and it runs fine

Quote:

Originally Posted by wootwoot

mobilesuit818, if you talked me like that in person I would probably bitch slap you to demoralize you. I have to talk in big letters in here because people do not know how to read and I have to help them by making it easier for them to comprehend it

Online Gansta's scare me

wootwoot · 03-13-2007, 08:18 PM

do you not understand what Iam saying????

the temp of the head/block will not cause the temp of the coolant to rise enough because the coolant will be flowing to fast to absorb the heat. Your temp gauge will not read accurately because of this giving the impression you are running cooler because your coolant will be. Just because your coolant isnt hot, doesnt mean your motor isnt. Do you get it yet?

Your friends motors are not running cooler. You just think they are..

03-10-2007, 10:42 PM	#1
BlackTruenoAE86 Zilvia Member Join Date: Jul 2006 Location: San Antonio, TX Age: 36 Posts: 150 Trader Rating: (2) Feedback Score: 2 reviews	My SR Runs hot on the highway. Why? I have had my SR powered S13 for a month or so. For the first time this week I have been taking long trips on the highway and started to notice that my temp gauge is going up two lines after a long period of time! Which makes no sense to me because the cars temp is perfectly fine in bumper to bumper traffic even down town. It only happends when Im at a constant rpm on the highway. I have a Godspeed front mount intercooler, stock boost. KA Radiator running with a Taurus fan. Can some one give me some insight. This is getting on my nerves. Thanks,

03-10-2007, 10:55 PM	#2
WILDACEX187 Post Whore! Join Date: Jan 2003 Location: QUEENZ, NYC Age: 42 Posts: 3,103 Trader Rating: (4) Feedback Score: 4 reviews	when u turn on the heat all the way does it help? sounds like the thermostat is getting stuck closed maybe. __________________ SR POWA COUPE LUVVV!!!

03-11-2007, 10:14 PM	#7
WILDACEX187 Post Whore! Join Date: Jan 2003 Location: QUEENZ, NYC Age: 42 Posts: 3,103 Trader Rating: (4) Feedback Score: 4 reviews	yea go through sum steps. start from easiest which would be to check coolant level, then do a thermo and then waterpump __________________ SR POWA COUPE LUVVV!!!

03-13-2007, 03:09 PM	#15
s13speeddrft Zilvia Member Join Date: Mar 2005 Location: orange county/ davis Age: 37 Posts: 235 Trader Rating: (1) Rides Gallery: s13speeddrft Feedback Score: 1 reviews	No it is a stupid solution and very ghetto. Just like other people said the [U]engineers[U] at nissan would not have put one on there if it did not need it or helped it out. Stupid people like you that half ass their jobs should not work on cars. To the original poster try replacing the thermo and see if that helps. __________________ http://s165.photobucket.com/albums/u63/ajhartma/ 1990 240sx hatch....currently monster truck status, with sunken battleships. Junkyard Scavenger

03-13-2007, 03:26 PM	#16
wootwoot Post Whore! Join Date: Jan 2004 Location: sarasota florida biatch Age: 39 Posts: 3,850 Trader Rating: (0) Feedback Score: 0 reviews	OK. Not running a thermostat can make your car RUN HOTTER. It will not show on the temperature gauge as well since it measures coolant temp, not the heat of your head/block All fluids have a heat capacity, for that heat capacity to be reached the fluid cannot travel to fast through the motor, or it will not get warm causing your shit to run hot. This isnt his problem, but this is what will happen if you take your thermo out. If you run to cool, you will not make optimum power and your car will run like shit. The taking out the thermostat and runnning a restrictor in there would work but why the hell would you do that? Thermostats arent complicated. Fucking backwoods mechanics. mobilesuit818, if you talked me like that in person I would probably bitch slap you to demoralize you. I have to talk in big letters in here because people do not know how to read and I have to help them by making it easier for them to comprehend it __________________ I'm from Florida so I'm probably a bit more strange than you

03-10-2007, 10:56 PM	#3
Gumballf355 Zilvia Addict Join Date: Oct 2005 Location: San Jose, CA Age: 45 Posts: 605 Trader Rating: (1) Feedback Score: 1 reviews	Your electric fan could be wired backwards... check which way the air blows when it's on... I bet that's it. It happens sometimes to people who don't pay attention to how they connect the fan. I've seen it a few times.

03-11-2007, 12:25 AM	#4
BlackTruenoAE86 Zilvia Member Join Date: Jul 2006 Location: San Antonio, TX Age: 36 Posts: 150 Trader Rating: (2) Feedback Score: 2 reviews	The heater lines are not hooked up. I might take out the thermostat and see what happends... The fan is pulling in the correct direction, i made sure of that... Thanks any other ideas?

03-11-2007, 05:42 PM	#5
JJ240 Join Date: Apr 2003 Location: Cedar Rapids, IA Posts: 49 Trader Rating: (0) Feedback Score: 0 reviews	Check your coolant level. If its slightly low that will cause spikes on the highway. If it seems just a bit low check the weep hole on your water pump. If there is any coolant leaking out of the hole your water pump is bad.

03-11-2007, 06:13 PM	#6
chmercer BANNED Join Date: Jun 2003 Location: texas! Age: 39 Posts: 3,288 Trader Rating: (0) Feedback Score: 0 reviews	maybe your water pump is jacked do you have a real temp gauge or the stock one make sure you have a real one

03-11-2007, 11:05 PM	#8
Wei240 Nissanaholic! Join Date: Sep 2002 Location: socal Posts: 1,778 Trader Rating: (0) Feedback Score: 0 reviews	yeah... i'd invest in a real temp gauge...

03-12-2007, 01:51 AM	#9
mobilesuit818 Zilvia Member Join Date: Jun 2003 Location: USA Posts: 269 Trader Rating: (2) Feedback Score: 2 reviews	Most likely it your thermostat. I would just take it out, and let it flow,

03-13-2007, 01:49 AM	#13
aznpoopy Post Whore! Join Date: Mar 2003 Location: New Jersey Age: 44 Posts: 5,013 Trader Rating: (1) Feedback Score: 1 reviews	hi. thermostats are important. they are also very cheap and very easy to replace, even if you buy oem. no reason not to replace it. there's absolutely no need for a ghetto solution.

03-13-2007, 03:40 PM	#17
tenmou Join Date: May 2005 Location: Grand Prairie Posts: 4 Trader Rating: (0) Feedback Score: 0 reviews	Is your fan wired to a toggle switch or a thermostatic switch? If it's the latter it might not be triggering/and or is installed improperly, causing you to over heat on slightly uphill sections of the highway.

03-13-2007, 04:02 PM	#18
mobilesuit818 Zilvia Member Join Date: Jun 2003 Location: USA Posts: 269 Trader Rating: (2) Feedback Score: 2 reviews	Call me ghetto, or whatever names you squirts can come up with. This method has worked for me and other cars that I have worked on and has never failed. I was trying to recommend a method of troubleshooting, and not a long term solution. Let me repeat myself for you ladies. This has worked for me and other cars. Its pretty funny, that you guys think your are straight up mechanics (no pun intended for the real mechanics out there). If you want some type of validating that you guys are in fact "know what you are doing", here you go. You guys are all winners to me!! I am done with this post. You guys can do what you want and I hope you dont get taxed by real mechanics. Once a poser, always a poser, and dont get it twisted.

03-13-2007, 08:18 PM	#20
wootwoot Post Whore! Join Date: Jan 2004 Location: sarasota florida biatch Age: 39 Posts: 3,850 Trader Rating: (0) Feedback Score: 0 reviews	do you not understand what Iam saying???? the temp of the head/block will not cause the temp of the coolant to rise enough because the coolant will be flowing to fast to absorb the heat. Your temp gauge will not read accurately because of this giving the impression you are running cooler because your coolant will be. Just because your coolant isnt hot, doesnt mean your motor isnt. Do you get it yet? Your friends motors are not running cooler. You just think they are.. __________________ I'm from Florida so I'm probably a bit more strange than you