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Old 12-01-2019, 07:21 PM   #1
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Pyrometer guage

Not sure if ny first post made it through. I just received my first diesel a 2015 Chevy Silverado 3500 dully. A friend told me I should invest in a pyrometer guage to keep track of exhaust temperatures. Do you all think it necessary, and who would I go to to have it installed. Thanks for time.
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Old 12-01-2019, 07:52 PM   #2
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Old 12-01-2019, 09:10 PM   #3
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If the engine is not modified then there is no need for a pyrometer. A stock diesel should not exceed safe exhaust temps under normal driving conditions, including towing within your trucks specs. If you just want all the available info and something else to worry about then go for it.
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Old 12-02-2019, 07:06 AM   #4
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So what did the dealer or GM tell you?
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Old 12-02-2019, 12:16 PM   #5
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Im not all that familiar with gm trucks anymore, but if they do a burn of the dpf the way other trucks do it could be handy to know what your egts are doing. It would be a way to make sure you dont shut the truck down during a burn and it could also extend the life of your turbo. Most people say to let your truck idle for a minute or so to let the turbo cool down, but if you had a gauge you wouldnt be guessing if its still super hot. Same with the regen, thered be no guesswork behind it.
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Old 12-03-2019, 01:32 PM   #6
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The aftermarket monitors/tuners have that ability already. Your truck actually has the sensors already installed from the factory. Fords have 3 exhaust pyrometers. I'm pretty sure GM has a very similar setup. You just need to find a monitor that taps into your OBDII port and reads that info for you.


As Theunz said, unless you're tuning the truck, I don't see much of a reason to worry about it. I don't think they will regen at less than about 25 mph. Your temps will be fine by the time you park.
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Old 12-03-2019, 02:11 PM   #7
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The aftermarket monitors/tuners have that ability already. Your truck actually has the sensors already installed from the factory. Fords have 3 exhaust pyrometers. I'm pretty sure GM has a very similar setup. You just need to find a monitor that taps into your OBDII port and reads that info for you.


As Theunz said, unless you're tuning the truck, I don't see much of a reason to worry about it. I don't think they will regen at less than about 25 mph. Your temps will be fine by the time you park.
I dont know what the parameters are for regen, but our safety guy had to have his turbo rebuilt earlier this year because he wasnt giving it enough of a cooldown. Id rather have it than not.
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Old 12-03-2019, 03:24 PM   #8
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I installed ISSPRO Pyrometer & Gauge on my Stock 2007 5.9L Cummins along with Tranny Temp & Boost ----also installed an Exhaust Brake



Being an old Control Operator in Power Plants I LIKE information.
Nice to see the correlation between boost and EGTs.


Cool down happens fairly quickly.......when you are NOT putting fuel in/EGTs drop quickly. 350*F and below (pre-turbo) happen within a few minutes....easily between the time you pull off and drive to rest area.
Start a diesel and at idle it will not generate enough heat to warm up the block
(750rpm/300*F)
So when you take your foot of the go pedal engine is cooling down and exhaust temps drop



But having the Gauges does let you watch/confirm and is FUN



Hardest part of Pyrometer install...drill into exhaust manifold

Greased drill bit to collect shavings and engine at idle so exhaust manifold was slightly pressurized.
Same when tapping for the threads on pyro ---IIRC 1/4" NPTF
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Old 12-04-2019, 01:01 PM   #9
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I dont know what the parameters are for regen, but our safety guy had to have his turbo rebuilt earlier this year because he wasnt giving it enough of a cooldown. Id rather have it than not.
For older models with turbos it is pretty risky to not allow the turbo shaft bearing to cool down, but you haven't given us the year and make of the vehicle that had the problem. My turbo is oil lubricated and water cooled. If it needs more than a minute or so at idle to cool down to a very safe shutdown temp than I'm gonna have a ruined turbo sooner rather than later.
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Old 12-04-2019, 01:06 PM   #10
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For the past 5 years I've been towing a 19,000 pound trailer with my unmodified 2013 Duramax with absolutely no issues. I find no reason to do any modifications.
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Old 12-04-2019, 01:06 PM   #11
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For older models with turbos it is pretty risky to not allow the turbo shaft bearing to cool down, but you haven't given us the year and make of the vehicle that had the problem. My turbo is oil lubricated and water cooled. If it needs more than a minute or so at idle to cool down to a very safe shutdown temp than I'm gonna have a ruined turbo sooner rather than later.
The safety guys truck is a 2015 or 16 super duty.
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Old 12-04-2019, 01:23 PM   #12
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The safety guys truck is a 2015 or 16 super duty.
My pickup is in my sig. Gotta know what how to operate each one's individual rig. Mine doesn't need a long cool down. I can't speak to anyone else's rig.
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Old 12-04-2019, 01:40 PM   #13
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My pickup is in my sig. Gotta know what how to operate each one's individual rig. Mine doesn't need a long cool down. I can't speak to anyone else's rig.
Thats why i like all the gauges i can have. If you dont know what its doing you cant even make an educated guess.
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Old 12-04-2019, 04:40 PM   #14
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For some people, if they really don't know what they're looking at, all the gauges in the world don't help anything.

When in doubt, idle for cool down won't hurt anything though.

It's pretty nice having the water cooled turbo though. Most times I can just idle to my parking space and it's ready to shut down, but one has to know that they can run it this way first. I didn't know my turbo was water cooled when I first bought the truck because the manual tells you nothing about this, only giving instructions for idle time before shut down. I hope the image loads ok.
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