redtop s14 over heating

[georgesal]

ok guys i got all the wiring issues out of the swap but my problem is that after about 10 minutes of driving the cars temp will slowly being to rise towards hot, i can let it idle for like 15 minutes and the same thing. If the heater hose were reversed would it cause this? i have bled the system any one have any ideas?

[godsmack]

Bad thermostat or bad water pump or fan. If the fan would be the problem it would only do it while driving slow or stopped and the thermostat will do it all the time. Way to check is start car with rad cap off and see if the water cycles or just replace the t-stat and see if it fixes the problem.

[NeedCAforS13]

redtop in an S14? did you switch out the coolant temperature sensor to an S14 sensor? you'll need to, or it will give you the wrong reading and appear to run hot all the time.

is the car actually overheating? or are you basing your statement on the fact that the gauge says it's hot?

[punxva]

if it is overheating, have you bled the coolant system properly?

[rex2sx]

redtop in an S14? did you switch out the coolant temperature sensor to an S14 sensor? you'll need to, or it will give you the wrong reading and appear to run hot all the time.

is the car actually overheating? or are you basing your statement on the fact that the gauge says it's hot?

Eh..I guess it makes sense but a guage is a guage. Some are more accurate than others. So changing the actual sensor wont do anything. Maybe you should get an aftermarket one to better monitor your readings.


Better yet. Take a DMM and read your voltage at the wire going to your guage, that will accurately tell you whats goin on.

[NeedCAforS13]

Eh..I guess it makes sense but a guage is a guage. Some are more accurate than others. So changing the actual sensor wont do anything. Maybe you should get an aftermarket one to better monitor your readings.

No. S14 and S13's use different signals from the temp sensor. Using an S13 sensor with an S14 gauge cluster = gauge reads hot after about 10 minutes. A gauge is not a gauge.

Search newbs.

I'd be willing to bet that he's got the wrong sensor in there. Car's don't typically go from cold to overheating in 10 minutes at idle unless they have something majorly wrong with them.

[NeedCAforS13]

http://zilvia.net/f/tech-talk/214514-s14-cluster-temp-gauge-reads-overheating-but-sr20det-perfect-temp-help.html

[timlush]

Yup. Switch the sensor.

[rex2sx]

No. S14 and S13's use different signals from the temp sensor. Using an S13 sensor with an S14 gauge cluster = gauge reads hot after about 10 minutes. A gauge is not a gauge.

Search newbs.

I'd be willing to bet that he's got the wrong sensor in there. Car's don't typically go from cold to overheating in 10 minutes at idle unless they have something majorly wrong with them.

No..Do you know what is actaully behind a guage? I am pretty sure it acts like a rheostat. If the sensor if anything is messed up, not the cluster.

In a sense you're right but what im saying is a bit different.

Even in the link people are saying go with an aftermarket for precise readings.

OEM guages are not as accurate as aftermarket guages. If he kept his OEM sensor and got an aftermarket guage then it would read the same thing.

[NeedCAforS13]

God damn, shut up. I know I'm right. If you don't know what you're talking about, it's really simple; Don't post.

Go back to your electrical engineering class with your rheostat you 18 year wannabe know it all with 55 posts who joined a month ago. You don't know shit about 240sx's. Where do these kids come up with this crap?

And you certainly don't reuse the factory temp sensor with an aftermarket gauge. That's just dumb. Aftermarket gauges come with a new sensor to use with the gauge.

[NeedCAforS13]

And it's spelled GAUGE. I don't know what a guage is... maybe they run with rheostats and OEM sensors?

[rex2sx]

And it's spelled GAUGE. I don't know what a guage is... maybe they run with rheostats and OEM sensors?

Sorry. Didnt mean to get your panties in a bunch.


Do you know what voltage is? Go read a DMM and tell me if its not accurate or not..:bigok:

I didnt know post count meant you were smart..i guess thats what happens when your drive a CA..hehe

[Grenade180sx]

STOCK GAUGES FAIL. i dont rely on stock temp gauges nor do i for oil pressure or anything else except speed. hell even the RPM isnt correct.

[rex2sx]

Yeah, they're not meant to be THAT accurate. Why would the average joe need to know EXACTLY what their oil pressure/ water temp is..even battery level. Its only there to give them an idea.

If you look at scan tools you get more precise reading but you are actually reading values. Or better yet, look at an oscilloscope.

[ho1ywars]

change the sensor. go to pepboys and ask for a temp sensor for the guage for an s14.

[GSXRJJordan]

The clusters are different, "NeedCA" is correct. They both work off variable resistance grounds, but read different temps at different resistances. And all stock temp gauges are center-weighted, to make the driver feel like the temps are "perfect" when there's actually like a 40* window where the needle won't even move. That's why stock gauges suck.

Yes, it is spelled GAUGE.

No, reversing your heater lines shouldn't cause a problem, it'll just cause your heater core to heat up even when the heater's off. What you need to do is jack up the front of the car, turn the heater on, and bleed the coolant system properly.

BTW, I also have a redtop in my S14, and it took forever (3 or 4 drives, with bleeding in between) to bleed properly. It'll go MUCH faster if you jack the front up a few inches to make the radiator fill the highest point in the system.

[rex2sx]

I mix up two letters and get flamed for it?? lol

I know how the sensor works..Just like IAT. Which is why i said to use a DMM . Ill admit i wasnt competely right, in that case. The s13 sensor is allowing too much current to the cluster, for the same amount of degrees. There are ways around it but getting an s14 one is probably easier.

Theres an explanation if you wanted one OP.

[NeedCAforS13]

It's like 8 fucking dollars for the right sensor. Just go buy it. Takes 2 minutes to swap sensors. Quit complicating shit. No need to bust out the multimeter for something that's a known issue with S13 swaps into S14's. Don't reinvent the wheel if you don't have to.

[georgesal]

thanks a lot guys all taken care of i feel like such a newb

[rex2sx]

I guess car varys..anyways...

All im sayin w/ the DMM was maybe he didnt feel like driving a car that overheated out to get parts. Or he had a DMM handy and wanted to check, just to make sure.

Stop trying to act hard in a forum.

[NeedCAforS13]

Stop pretending to know shit and I won't have to "act hard".

[rex2sx]

Not even going to respond to that ignorant statement.

Well problem solved, no use beating on a dead horse.

It seems like you fixed your problem OP, good stuff.