GM EGT Sensor replacement

[SixtySevenGT]

Anyone put one of these in a Polaris
Will it even thread in ?



I have been looking into exhaust temp sensors for the last 2 weeks because I have a real issue with over paying for a simple component from Cat. In Canada, the exhaust temp sensors go for $150, and IMO that was just too much to ask. Thinking these probs are a generic item, I looked around and this is what I found.

The new 2011 GM Diesel engines use an exhaust temp sensor that looked virtually identical to the Cat one. I spoke to a few diesel techs and received the diagnostic info and temp: resistance chart.

It was tricky to to get this info as I asked several places without much luck. Not to name names, but thanks to the tech that got me what I needed.

The only thing that you have to go is either change the connector to cut and solder the pig tails together.

Specs:

Cat prob: P/N 0630-229

2011 Chev Diesel prob: P/N 12636945 (replaced by 12643246)

Exhaust Temp Sensors
Temp Cat Prob Gm Prob P/N 12636945)
(*F) (ohms) (ohms)
-40 170 170
-4 185 185
32 200 200
77 220 220
122 240 238
212 275 276
302 315 313
392 350 349
482 385 385
572 420 420
752 490 488
932 555 554
1112 620 618
1292 680 680
1472 740 738
1652 795 795
1832 850 849


I have not had a chance to run this yet, but once I do, I will let you know how it went. Should just be a few more days.

 

[SixtySevenGT]

No One

Not one of you has tried this.

Seems you are All Happy with paying thru the Nose for the Polaris unit.

 

[diamonddave]

I'm confused...you mention Polaris but then you mention Cat 4 times.

Are you trying to retrofit the GM unit to Polaris or to Cat?

And what is the retail price on this GM temp sensor?

 

[line8]

Gm fits the cat (07-09, probably beyond) part #12643246 . A search here or Google should find some more info.

 

[SixtySevenGT]

Priceline

Seems the GM Replacement unit is less than 30.00 for the Cats.

SO is there a Similiar 30.00 dollar unit for Polaris ?

Or do we just contimue to pay 125.00+ for the stock unit ?

Seems like the GM unit ( or similiar) would be the way to go ---

 

[theshadowrider]

Seems the GM Replacement unit is less than 30.00 for the Cats.

SO is there a Similiar 30.00 dollar unit for Polaris ?

Or do we just contimue to pay 125.00+ for the stock unit ?

Seems like the GM unit ( or similiar) would be the way to go ---

I went the route of $.30 resistor. (Actually free from my friend)

Just soldier in a resistor and haven't had a problem for 3 years now on my dragon.

 

[SixtySevenGT]

The Resistor

Could you be more Specific on the The Resistor ?

What watt
What Ohm


Where did you get it ?

 

[theshadowrider]

Could you be more Specific on the The Resistor ?

What watt
What Ohm


Where did you get it ?

Turbo guys have been running resistors instead of probes for years. The EGT probes seem to not last very long under-boost for some reason. You can get them at radio shack. I can't remember watt, 1/2 watt maybe, but you want to solider in 8-10k ohm resistor on the wires going to the ECM and then shrink wrap it. Then just leave the other end of the probe in the pipe. There was a big thread about this, go through and read it. I have been running the resistor for 3 years now. The ecm is looking for a certain range on the pipe. If it doesn't get the correct range it will flash the engine light and add fuel to the fuel map. So, all you are doing is tricking the engine that its in the correct range so it doesn't go into rich fuel map. The egt pipe sensor is not actively tuning the fuel map. Its either on or off.

http://www.snowest.com/forum/showthread.php?t=246826&highlight=egt+resistor+dragon