Do all 6.0 diesels squeek when you shut them off? Mine has done it since i bought it, and i was told by several people its just the belts coming to an abrupt stop. Its not a problem, but it doesnt sound very good on a NEW truck....

 

ya mine does it also

 

It's normal.

Many powerstrokes and nearly all Cummins do it.

All that rotating mass coming to a sudden stop makes the belts squeak.

 

Cool beans...

I know the Cummins did it, my buddy has one, and it squeeked. I thought it was because it had 182,000 miles.....so this is good news.

Thanks

 

yes the compression wants to keep spinning the pulleys and it just stops. its hard to stop something going 650 rpm with something as small as a grooved belt.

 

So is it safe to assume that gasoline engines do not stop as abruptly?

 

no, they have much less compression. there fore it is much easier to stop because it doesnt want to run off of compression as easy (my guess) gassers are like 6-9.1:1 where diesels are 24-27:1

 

hmm....thats interesting. I just learned something. I had no idea that diesels had that high of compression. So since they do run on compression, the only way to kill them is to kill the fuel supply rather than just killing the spark....is that correct?

 

Either kill fuel or kill air. Killing fuel is usually easier - especially on our trucks.

My father in-law told me that all their fire trucks had emergency stop fuel shut offs in case the motor decided to run away for some reason. He's actually seen that happen in a fire truck that didn't have a fuel cutoff - it was a bad thing. He's also seen them get started in reverse, which must be interesting

 

I just started to notice this on my buggy with about 57,000 on the ticker. My pal's Crummins with just over 100k does it quite loudly. I didn't think it was a big deal, and now I know that to be true thanks to the fine folks at FTE.

Keep up the good work, fellas.

Big

 

I have 54,000 miles on my 2003 Excursion Ltd 4X4.

I have just developed the "squeek" upon shut down of the truck, but it is NOT the turbo.. but either a pully of the drive belt (I think). It doesn't do it all the time, but it does worry me??? I wonder if the high heat of the summer is causing the belt to "glaze" over and "squeek" when shutting down????

All gauges read normal and mileage and truck functions have not been compromised, so I would either think drive belt, fan clutch or something along those lines. If it happened on start-up (like the old days) it would definately be a "slipping drive belt".

Good luck,

Jeff

 

Most bigger trucks, including most of our apparatus, still have an emergency fuel stop. A runaway engine, especially if you're in pump gear, can be bad news and very expensive.

I was commuting home along IH-30 a few months ago and had the pleasure to pass a broken-down Coca Cola truck which was suffering a runaway condition and was in the process of Valdezing oil out the stacks and all over the roadway. Apparently he either didn't have an emergency cutoff or didn't know how to use it. That was a fun cleaning job . Fortunately, I called Coke and they compensated me for time spent to remove the oil.

 

There is no "spark".

No ignition coil, no spark plugs....just glow plugs to initially heat the cylinders.

 

In some cases, if the radiator fan is on at time of shut-off, there have been ocassions when the fan will "squeek" / chirp,
until it fully stops cycling.
However, this has been found on vehicles with some mileage on the engine. Just a thought to consider

 

We have one with about 20K and one with 11K that do not squeak, one with about 6K that just started. Just noticed it after seeing this thread. 2 7.3's a Cat that don't.