Ok how long should i let the truck run at idle before i shut her down in order for the turbo to cool down? Minute? 2? 3? 5? Thanks.

Stew

 

The answer is....... yes.

The generally accepted rule is 300 degrees. Now that will vary depending on outside air temp, how hard you were running the truck and the load.

Usually, under slow and go circumstances, 1-2 minutes.
medium load or flat highway driving, 3-4 minutes
heavy load and or mountainous driving, 5+ minutes.

Clear as mud?

These times are from my own observations, I am sure others have a different idea on times. I would put in a pyro gauge and use it for the anwer to your question.

Dave

 

cruzer i usually let mine cool about 1 min for around town and i watch the pyro.

 

Question: I tow a trailer during the summer. Is there any special cooldown needed?

Cummins : If you are towing heavy loads this summer, you should let the engine idle for a three- to five-minute cooldown after extended full-throttle or high-power operation. However, under normal driving conditions like simply exiting a highway, a cooldown isn’t needed.

http://list.priceweber.com/cummins/summer.html

 

Rodger that, it depends on what you were doing before with the truck. If you need explaination, next time you tow, sit in the truck and watch the pyro till it is at 300, that is the time it takes. And if you are just dodle dicking around town, watch and see how long that takes.

 

Hello
My truck cools down pretty fast, but I still let it idle for at least a couple of minutes after I stop the truck.
When we are pulling something I let her idle for roughly 5 minutes to let everything cool down nice and slow. I let it idle while we do things like get our shoes back on and time for me to open the door and stand outside and stretch.
See Ya
Chris

 

everybody togather now say 300 deg. (mabe 315) you need a guage and you need to think what the oil has been doing too!!

 

Well that is the nice thing about the cool down timer, just set and leave. Not only does it help remind me to cool things down, it makes it simple and very easy. I use the lowest setting 95% of the time, and it is more then enough. In the heat of summer and while towing, I would just got to the longest setting. So simple, and so in-expensive, I don't know why more people have not seen the light? I love the feature.

 

Cruzer75,
You don't have anything in your signature to let us know what you have for mods.

If you are running a stock truck don't even worry about cool down unless you've been running hard or pulling. Then 2 minutes are plenty.

Stan

 

Ok updated my signiture line! Truck is a Stock 99 2500 CTD, 5spd, quad cab, 8ft bed. I am going to get the 3pillar gauges first, EGT, Boost, and Fuel Pressure. Now everybody says "whatch the pyro gauge" Do they mean an EGT OR do they mean a specific other thermocouple place in the oil flow for the turbo?

Stew

 

Everyone is referring to the EGT.

 

I have my Isspro turbo temperature monitor set to 275.