Exhaust Gas Temperature--Shutdown

[CROW]

After almost five years, two Dodge/Cummins trucks and 65K miles, I finally got an exhaust temperature temperature gauge. Installed an Autometer Ultralite II. I have seen a number of threads on the correct temperature to shut down the engine, but to be honest, I haven't paid a lot of attention since I did not have a gauge. I was concerned that I was idling my truck too long before shutdown and therefore got the gauge.

Gauge is located post turbo in the port provided in the Jacobs exhaust brake.

What is the appropriate temperature to shut the engine down with probe post turbo?

Thanks for any responses.

 

[John - K5AWO]

Mine is pre-turbo in the port provided by ATS on their 3 piece manifold. I shut it down at 350. 275 to 300 is as low as it will go for me here in Phoenix.

 

[Forrest Nearing]

move the thermocouple pre-turbo



I try to shut down at 300, but sometimes I'll go 325-350 if I'm in a rush. I figure the synthetic oil can take it

 

[ScottLewis]

My BD Cooldown timer is set at about 325, post-turbo. Setting it lower resulted in excessively long idle times. Waiting for it to cool to 300 can take several minutes even after driving just short distances in town. It's totally stock except for gauges and the cooldown.



Dan

 

[rbattelle]

The rule of thumb is to wait until 300 F. I tend to wait until I hit 200 F, but that's because I'm paranoid. I've learned to drive the last 1/4 mile of my trips to minimize EGT when I come to a stop, so I rarely wait more than about 10 seconds to shutdown.

Despite what Forest (and many others) say, if your goal is to monitor shutdown temperatures, in my opinion there's no need for pre-turbo EGT.

Ryan

 

[SBeretz]

I am post turbo also, in my Pac Brake port, and I shut down at 350. . It would take a good few minutes to shut down at 300 in the hot summer. Most guys never have any gauges and shut down immediately, so shutting down at 350 seems plenty good to me. This is after easy trip around town with little to no load. If I am pulling my toy hauler, I will wait for it to cool and let the whole engine cool some before shutting down. Scotty

 

[HBarlow]

During a break after a class at the Cummins Mid Range Engine Plant in Columbus, IN during the summer 2002 TDR Rally a Cummins engineer told me that 350 degrees was completely safe. I had always followed the TDR "rule of thumb" of 300 degrees mentioned above until I got that advice. I find it takes longer to cool down my '06 than it did the '01 and I usually run out of patience (or need to empty my bladder too badly) to wait for 300 degrees.



I've not experienced any turbo problems in 325k miles on the '01 or 205k and counting on the '06.



Harvey

 

[Forrest Nearing]

The rule of thumb is to wait until 300 F. I tend to wait until I hit 200 F, but that's because I'm paranoid. I've learned to drive the last 1/4 mile of my trips to minimize EGT when I come to a stop, so I rarely wait more than about 10 seconds to shutdown.



Despite what Forest (and many others) say, if your goal is to monitor shutdown temperatures, in my opinion there's no need for pre-turbo EGT.



Ryan

definately paranoid! you're just wasting time and fuel doing that.



no need for pre-turbo, but it actually allows you to monitor your engine

 

[Motorhead]

I know this subject has come up many times. Yes, I also cool down my turbo before I shut down... ... ...

I just retired from UPS and we ran various turbo diesel delivery trucks (Package Car is UPS's term ). We had 12 valve, 24 valve cummins, 7. 3 internationals.

UPS drivers NEVER take one extra second to cool down the turbo and in all of the years that I was there, there was not ONE turbo failure!

It was not uncommon to be driving the freeway fully loaded, wide open throttle for 15 miles, roll up to your first stop and immediately shut down.



I am not saying that this was GOOD for the turbos but we never had a failure.

 

[Forrest Nearing]

yup, think of how many people w/ stock trucks do the same thing... I cool mine down, but we're talking maybe 1-2min... enough time to collect my wits and make sure I'm not forgetting anything in the truck! LOL

 

[Bob V]

I do 350 on my 05. 300 would take hours!

 

[Forrest Nearing]

aftermarket turbo helps a lot

 

[DWeiler]

No shutdown here on my company 01 Ford 7. 3,just hit 220,000miles 30-40 stops a day and loaded full of bread,run hard,stop and go traffic. I don't abuse this truck but i"m not easy on it either. ---Still original turbo. No time to stop and wait,customers:-{}:-{}:-{}tend to keep me on a schedule.

 

[HBarlow]

I know this subject has come up many times. Yes, I also cool down my turbo before I shut down... ... ...

I just retired from UPS and we ran various turbo diesel delivery trucks (Package Car is UPS's term ). We had 12 valve, 24 valve cummins, 7. 3 internationals.

UPS drivers NEVER take one extra second to cool down the turbo and in all of the years that I was there, there was not ONE turbo failure!

It was not uncommon to be driving the freeway fully loaded, wide open throttle for 15 miles, roll up to your first stop and immediately shut down.



I am not saying that this was GOOD for the turbos but we never had a failure.

Motorhead,



Thanks for that information. It is useful to know that entire fleets such as UPS ignore the shutdown and never have failures. The Cummins engine and turbo are probably designed to tolerate that kind of abuse even though our Dodge owner's manuals instruct us to allow a cool down. I've wondered many times about how important a cool down period truly is because I've heard UPS drivers, other commercial light truck drivers, and even big OTR trucks do exactly the same thing.



Harvey

 

[Forrest Nearing]

big OTR drivers will usually cool down. if they're an O/O, I promise you they do.



FedEx and UPS and the like are delivery drivers... they don't have time for that!