temp: where does stock get it from?

[BOBA]

Typically the stock guage ran around 1/4(140º), now I'm getting temps at about 180º.

The stock IC pump finally failed (after a cold snap and then a warm up, the pump just cracked down the side) on me, and that's when the temp first increased, but now after replacing the pump there is no improvement. I second checked to make sure there were no more leaks/cracks elsewhere... all looked okay and passed a pressure test with the new pump installed.

Does the stock guage only measure engine temp, or does it take into account the turbo temp as well? If it measures the turbo as well, where? maybe a line got shot when the pump went. If not, possibility of a thermostat failure as well? Is there even a stat on the turbo system?

Also, how hot is too hot for the turbo? After driving a short distance w/o coolant(when it first "exploded"), and the above mentioned dilemma, should I worry about damage to the inner workings? btw... it's garaged right now until I know for certain I'm safe.

 

[Captain Morgan]

Re: temp: where does stock get it from?

the water temp gauge only measures engine temps, has nothing to do with the intercooler system.

there is no thermostat on the turbo system.

"too hot" for the turbo isnt going to have to do anything with the coolant system on our trucks. The coolant system it there to cool the intake air, not cool the turbo. Our turbos are cooled by coolant and oil, however the coolant is from the engine, not the intercooler. The only way to measure "too hot" in terms of turbo temps is with an Exhaust Gas Temp gauge, and even then its not going to be a matter of cooling, but more to do with a rich or lean fuel condition and a heavy foot.

Your 180* temps sound normal to me, infact 140* is probably too cold for normal opertating temps, I believe 170* is the best overall temp from some tests I read about oil viscosity vs. complete fuel burn.

Your truck sounds just fine to me as long as you can hear your IC pump running now (if you have the hard wire trick done)

 

[Don W.]

Re: temp: where does stock get it from?

All of the above. Only difference is, if the IC pump is NOT hot wired, the IC pump doesn't even come on until an engine water temp of (I think) 200.

 

[BOBA]

Re: temp: where does stock get it from?

Thanks for the input, I'm wondering why my truck was running so cool beforehand... or if the guage was just stuck at some point.

I'm looking at the pump to make sure it's running right this week. So far so good, just a bit paranoid. Just doing my best to break as little as possible.

 

[VermontTy]

Re: temp: where does stock get it from?

To hotwire your pump, take the yellow wire from the IC pump relay on the firewall, cut it, and ground it. If the pump is still wired in the stock configuration, turn the key to "ON", and jumper the A & B terminals on the ALDL plug under your dash. This will turn on a bunch of stuff including the IC pump (regardless of temperature) and flash any codes you may be storing....

 

[mmp142965]

Re: temp: where does stock get it from?

To hotwire your pump, take the yellow wire from the IC pump relay on the firewall, cut it, and ground it. If the pump is still wired in the stock configuration, turn the key to "ON", and jumper the A & B terminals on the ALDL plug under your dash. This will turn on a bunch of stuff including the IC pump (regardless of temperature) and flash any codes you may be storing....

Id like to do this as well. The yellow wire is a switchable ground? That means the other wire for the IC pump is 12V as long as the key is turned to "on" correct?

EDIT: i found it here... http://www.sytyarchives.com/howto/viewarticle.php?article_name=ic_pump_hotwire.php&dir=engine

 

[VermontTy]

Re: temp: where does stock get it from?

yeah, the relay is fed with 12V, and when you pull the yellow to ground, it sends 12V to the orange wire going to the IC pump. You can either just ground the yellow wire, or you can put a switch to ground so it will only turn on when you hit the switch. If you ground it without a switch, as soon as you turn the ignition on, the pump will run.

 

[mmp142965]

Re: temp: where does stock get it from?

yeah, the relay is fed with 12V, and when you pull the yellow to ground, it sends 12V to the orange wire going to the IC pump. You can either just ground the yellow wire, or you can put a switch to ground so it will only turn on when you hit the switch. If you ground it without a switch, as soon as you turn the ignition on, the pump will run.

and normally this ground is provided by the ecm at a certain temperature, via this yellow wire?

 

[SY756]

Re: temp: where does stock get it from?

and normally this ground is provided by the ecm at a certain temperature, via this yellow wire?

Yep.