JimzSS

Any one know @ what temperature does the h/e exchanger pump turn on. It runs off a relay, so I am assuming something, maybe the ecu tells it when to circulate the coolant. It was easily in the 80's here today, I have the factory h/e, cobra h/e and hatricstu's cooling mod. I swear that the pump won't turn on while I watch it idle. Every part of the system is easily touchable by hand. I can jump the pump in the fuse/relay box and I know it works. Any ideas? Thanks again

lil_kano

hmm intresting. click.

hungryhip-ccp

iTrader: (2)

its always on as soon as you start the car, unless you turn it on with hpt to turn on with the key on engine off

you need the hatrickstu hammer mod

Rodimus_Prime

iTrader: (3)

its not a temp its a time, usually stock 10 sec after the car is on and i think below 32 degrees it does not enable

red06s/c

Isnt the pump not working a known problem for LSJ's?

JimzSS

https://www.cobaltss.net/forums/showthread.php?t=126618
that is the mod I did.no leeks..woot! I watched it for 5 minutes and never saw it pump. its stock, no hpt. hmmmm...it works because i jumped it, and when I plug the relay back in the relay clicks and the pump jumps. thanks for the info!
hey red06, you up for dw42?

an0malous

it has happened to a few people.
but not what i would call a common problem.

lil_kano

ok i don't mean to thread jack but i have a quick question. i have a 2.2 that im going to be supercharging pretty soon. well supposedly the stage 2 belt with the stock ss/sc belt is supposedly the perfect fit on the 2.2. so my question now is that will these cooling mods benefit me since im not going to be boosting high and i don't plan to but i would like to be efficient and may be get some better MPG.

also to the OP is the fuse your talking about the aftercooler relay and fuse? if so then i have another question. do you guys think i can use the OEm spot to wure in the pump for my setup that im goign to be using?

JimzSS

Late night bump for you late nighters...lol. lil kano, yes, the relay is for the pump, but off hand i don't remember which one exactly. I will look when its light out. As for cooling mods, any cooling mod will benefit, no matter the boost level. They are all in the name of cooler air for a cooler intake charge. If the fuse blocks are the same, i would assume that the location of the relay would be the same. As for wiring harness, I am clueless.

Try2k

So at startup it wasn't working? What about after driving?

I tried the hammer mod and I have still yet to feel any movement from the pump but I have only tried it seconds after I crank the car. I waited a good minute but nothing.

brett5

it should always be on and i've noticed with the higher the rpms of the motor are the faster the pump pushes the dex cool..but it should always be running

light'bolt

I tested mine and it runs right after start up

brett5

it works with rpms...if you don't see the coolant hualing ass in the bottom of the t neck you need a new pump...and yes these pumps suck it happend to me and about 500 hundred others;;;ebays sells a replacment for like 90buck it the rousch for the f150

its been working great for me and put out about 4 more gallons per minute which really helps with second H/E

JimzSS

Like my original post, the car was alredy ran and I watched it NOT cirulate....pulled the relay and jumped power....it circulates all day long...unjump, reinstall relay and relay clicks, pump jumps. something is telling the relay to open...what tells it? key on? ecu? hmmm,Thanks for all the input guys, glad you are all here!

lil_kano

it might also be different for the different year models. so the 05 n 06 might differ from the 07....

JimzSS

ok, so I ran home on the E way this after noon, a/c on and I needed fuel....I pull into the station and left it run, popped the hood and..NOPE...no ciculation. Its 87* out & both fans are running, a/c still on. So, I switched the smokin' ass hot a/c compressor relay for the h/e relay and it kicked on, and the a/c clutch worked with the h/e relay in its place...they are the same part# relay, side by side in the box. I drive home, made a short 2nd gear pull up to speed limit and then pop the hood, its still running. I shut down the car, started it imediately back up and the pump never turned back on. WTF!!!!!!!! Any more ideas guys?

red06s/c

get a ss/tc?

JimzSS

FIXED, relay wasn't making contact. Tweaked the tabs and GOOD TO GO! And the pump runs constantly and starts up within 5 seconds of starting the engine. Thanks again everyone.

RedHotJamLedJimi

hey i had this problems for probably years and didnt know it. today i was playing around with it forever and no avail. until i came on here and decided to tap it with a wrench and voilah water guhsing like niagra. and lil particles that were black in my coolant at the T. so good altogether sucks that so many cobalts are diseased like this. i bought a cobra heat exchanger well over a year ago and probbably never had the pump working. WTF. thanks all.

USMCFieldMP

iTrader: (1)

eBay... search for "Lightning Intercooler Pump"

You should be able to buy a Ford Racing I/C pump for $80.

It is the EXACT SAME PUMP as the GM one... just $300 cheaper.

theneelster

Common for the 04 and some of the 05 redlines as the wiring for the pump was backward from the factory (I believe it was the electrical harness). Otherwise you should get 50k miles out of one; they are actually pretty good for a factory pump.

You can use any 12 volt water pump as a replacement. There are some pumps that push more than the bosch pump such as the jabsco water puppy (I believe they have pumps that move 12gpm-stock is 9gpm) just there might be problems with leaking at the inlet and outlet plumbing as it's not going to be one piece. Using a higher flow pump would likely result in lower operating temperatures and less heatsoak but don't quote me.

goeckeritz123

iTrader: (10)

So I'm a noon and curious n what test I could run to determine if mine is bad and the hammer mod where do I tap the pump at thanks guys