Thread on 5.9ISB cracked blocks on Bus sight

[tractorface]

http://www.schoolbusfleet.com/forum/topic.asp?TOPIC_ID=7895&#62571



Check it out if you have the stomach for it. :{

 

[Ncostello]

The guy who wrote the second post drives a Ford 6. 0 Powerstroke.

 

[Mike Ellis]

Sounds pretty grim, they mention several times the turbo being mounted off of the cast aluminum timing gear case. Hmmm.



Wonder if there have been as many problems in the delivery truck / RV application areas?

 

[ndurbin]

I've seen one 8. 3 that had a flaw in the casting that caused the headgasket to leak. And that was fixed under warranty. But how many warraty fights do you here with Cummins versus fights with Ford/International over their engines.



Some of those guys need to realize the grass may not be all that greener on the other side of the fence.



Nathan

 

[jrobinson2]

Sounds pretty grim, they mention several times the turbo being mounted off of the cast aluminum timing gear case. Hmmm.



Wonder if there have been as many problems in the delivery truck / RV application areas?

Its the air compressor for the air brakes that they are talking about not the turbo.



They also complained about oil leaks and I have had the same experience. I have a 160HP B5. 9 industrial engine that is always in a puddle of oil, in the last 2 years I have changed the gaskets for the timing cover, oil cooler, oil fill neck, valve covers, oil pan, and front main seal and it currently leaks from the rear main and the lifter galley cover. I think it may be worn out by the time I get all the leaks stopped, its got almost 11,000 hrs and has been a very reliable engine other than the leaks.

Jared

 

[rbattelle]

It's interesting to read the experiences of these heavier vehicle operators with the 5. 9. Seems like the most of the problems are related to heavy components bolted to aluminum timing covers (or the infamous #53 block).



I, too, am curious what the experience of UPS is with their 5. 9s in their little delivery trucks. Seems to me a little brown UPS truck is a closer match to the 5. 9 than an 84 passenger bus.



-Ryan

 

[JUeckert]

It's interesting to read the experiences of these heavier vehicle operators with the 5. 9. Seems like the most of the problems are related to heavy components bolted to aluminum timing covers (or the infamous #53 block).



I, too, am curious what the experience of UPS is with their 5. 9s in their little delivery trucks. Seems to me a little brown UPS truck is a closer match to the 5. 9 than an 84 passenger bus.



-Ryan

i would have to agree with that statement,the 5. 9 is better suited to the ups trucks,than they are to the buses. . i have a mechanic friend that works on the local schools buses,other than being underpowered and having the cracks were the air compressor bolts to,and exhaust manifold cracks,not to mention oil leaks,the engines are otherwise pretty much trouble free. {12 v}engines. at the same time i have another friend who works for ups,he claims that the smaller trucks with the isb engines in them,run great ,but they have had several issues with the fuel system,and a couple of head gaskets fail also. the bigger trucks that run the powerstroke engine{7. 3}run great as well,but had a few injector probs in earlier engines,and a ocasional turbo faliure,he admited that the turbo failure could be related to not letting them cool down at each stop,because they are required to not leave them idleing,even in door to door deliveries. .