start up/ shut down

[mymileager]

Ok so I have always heard its hard or bad for a diesel to start up and shut down a lot, I do a lot of driving and usually when I get somewhere I know I'm going to only be a few minutes I leave the truck running, more in the winter then in the summer.

How bad is it to shut down after a short drive if the motor is still cold, also how long should I leave the truck running in the morning before driving it?

Also the rig is a 2002 f350 cclb drw 7.3l

[rufushusky]

Does your engine enjoy being shut off when cold...no..will it destroy it..no. If you know your going to be doing a lot of short hops, keep the OCIs short (like 5k or so) and maybe look into a battery minder. Also plugging the truck in will help it get to operating temp faster.

Sometimes I grab a coffee on my way to work and Dunks is only about 2 miles from my house and I just shut it off.

On most mornings my truck has from when I finish turning the key to when I put the truck in drive to warm up. I am not much of an idling person and unless I have REALLY worked the truck hard, towing or plowing, I don't let it idle down when I shut it down either. I have done this for about 300k miles on two 7.3s and a 5.9 never had an issue.

[FSS Diesel]

all diesels run and operate better when at operating temps...... I let my truck run about ten mins while im getting together my stuff for the day... I keep two keys with me at all times 1 in the truck ..... 1 in my pocket.... I leave the truck running and lock the door for short stops then unlock with secound key on short trips and stops.... never do i work my truck hard and kill the engine.... I always run my turbo minder for 10 mins after and it kills the engine when the time runs out.. That lets the oil cool down before the engine is shut down.

[mymileager]

What about doing any damage to the actual engine block over time (i.e. Cracking or fatigue) from going from start to stop, cold to hot to cold???

[ttyR2]

Naw. Won't matter.

I idle until EGT's read 300deg F or lower before shutting down. Idling for 10 minutes seems excessive.

[FSS Diesel]

EGTS have nothing to do with your oil temp. being high or hot for that matter.....
if you run hard pulling your oil temp is going to be hot!!! the longer you idle the cooler the oil gets.... why is that important... if you let your oil get hot while pulling and you just keep shutting the truck down you leave the oil temp hot and over time it will do damage to most bearings including the turbo bearings!!!! the turbo bearings get alot of abuse as it is. so we at fssdiesel.com suggest you run or truck long enoght to cool down those temps before shutting down.....My Question IS if heat and oil temp. is not important then why do they sell turbo timers?

[strokinpower]

What about delivery trucks that are started and stopped a hundred or more times a day. i.e. UPS trucks

[mgassel]

Originally Posted by strokinpower

What about delivery trucks that are started and stopped a hundred or more times a day. i.e. UPS trucks

alot of the delivery trucks are left running depending on the area and if they are shut off they are restarted fairly quickly most of the times. When they are not started quickly after shutting it off that is when you see them in the shop alot.