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BUSMAN5
Active Member
United States
17 Posts |
Posted - 08/06/2011 : 2:10:42 PM
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We have a little more than 50 VT365 powered Internationals in our bus fleet. We are always experiencing problems like: injectors, egr coolers, egr valves, ipr failures, rocker arm problems, pushrod problems, etc. We definitely stay busy around the shop with these fabulous engines. This is the second time in 2 months we have had a pushrod bend in the same bus. Once on cyl 6 and now on cyl 8. Here is an example of a pushrod from a 2007 VT365. Notice both the bend and the break:
http://farm7.static.flickr.com/6136/6015806916_6af02137f3.jpg |
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IBTMech
Top Member
USA
973 Posts |
Posted - 08/06/2011 : 3:49:12 PM
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Usually bent pushrods are a result of engine overspeed. Do these buses have standard transmissions? Could they be getting overcranked going down a steep hill?
Seen it happen more than once on other engines. |
If it doesn't fit, FORCE it. If it breaks, well, it needed replacing anyway. Pullin' wrenches for 45 years. |
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BUSMAN5
Active Member
United States
17 Posts |
Posted - 08/06/2011 : 4:36:59 PM
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quote: Originally posted by IBTMech
Usually bent pushrods are a result of engine overspeed. Do these buses have standard transmissions? Could they be getting overcranked going down a steep hill?
Seen it happen more than once on other engines.
They all have Allison autos. The rocker arms have clips on them that break off and the ball of the pushrod starts to bounce around and wear unevenly and I guess eventually it catches the edge of the rocker arm and bends. We are having tons of issues with these engines. Not just a few, all of them give us problems. |
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eicsbus
Senior Member
Canada
126 Posts |
Posted - 08/06/2011 : 5:23:00 PM
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50 more boat anchors,,lol |
I.C. NO FUTURE
formally ,,,,wright11 |
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bwest
Administrator
United States
3820 Posts |
Posted - 08/06/2011 : 6:24:55 PM
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If the shoe fits.... er anchor.... er engine.... er what ever! |
Bryan |
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Thomasbus24
Administrator
USA
4544 Posts |
Posted - 08/08/2011 : 12:49:05 PM
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Wouldn't you like to meet the guy that thought that those plastic clips for the rockers were a good idea? |
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BUSMAN5
Active Member
United States
17 Posts |
Posted - 08/08/2011 : 4:11:13 PM
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quote: Originally posted by Thomasbus24
Wouldn't you like to meet the guy that thought that those plastic clips for the rockers were a good idea?
Yes. I do believe I could think of a few things to question him about lol. I think I need to start a log of all the issues we have with the VT365 since we have so many. Everyone who doesn't have these engines should feel very lucky. All of ours are out of warranty so this year a big chunk of the budget is going to be tied up in these things. |
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bluebirdvision
Top Member
USA
1081 Posts |
Posted - 08/08/2011 : 6:45:13 PM
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I'm not exactly sure what happens to them, but at around 100,000 miles almost all the E450 (6.0L) cutaways at work have to be "rebuilt." I forget how much it costs, but I know its a lot. |
Facebook Page: Blue Bird Corporation Fans https://www.facebook.com/home.php?sk=group_212311114614&ap=1
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Edited by - bluebirdvision on 08/08/2011 6:47:00 PM |
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slippert
Top Member
USA
630 Posts |
Posted - 08/09/2011 : 05:24:36 AM
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Personal opinion: I have never worked on or seen what I would call a durable V-8 diesel engine, doesn't matter who manufactured it Cat, Cummins, IH, or whoever. Most as far as I'm concerned were built as throw a ways, but I have always been partial to the inline diesel engines and do my best to keep any V-8 diesel out of my fleet. |
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Bus Tech II
Senior Member
121 Posts |
Posted - 08/09/2011 : 10:49:34 AM
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Hello Guys, just wanted to share some info I know about this issue. This is a known problem and there is an updated valve train kit p/n 1876380c91. If you have access to ISIS it is a iKnow document IK1200053. I also have the instructions how to install the kit bus for some reason cant figure out how to attach the file. Hope this helps guys. |
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Bus Tech II
Senior Member
121 Posts |
Posted - 08/09/2011 : 10:52:31 AM
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Also there have been cases of the lifter retainer clip breaking and the lifter actually spins and eventually wipes out the cam. |
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BUSMAN5
Active Member
United States
17 Posts |
Posted - 08/09/2011 : 2:46:58 PM
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quote: Originally posted by Bus Tech II
Hello Guys, just wanted to share some info I know about this issue. This is a known problem and there is an updated valve train kit p/n 1876380c91. If you have access to ISIS it is a iKnow document IK1200053. I also have the instructions how to install the kit bus for some reason cant figure out how to attach the file. Hope this helps guys.
Thanks for the info. We recently bought a rocker arm kit that we are robbing parts out of. I will check the p/n to verify tomorrow.
We had two more big vt365 breakdowns yesterday and today. One must have bent a push rod because it is blowing compression out of the intake. Another went down with a bad low pressure oil pump. We took the hood off and drained the coolant today. Fun starts tomorrow! |
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RichBusman
Advanced Member
453 Posts |
Posted - 08/09/2011 : 3:20:59 PM
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Have you been in touch with your IC regional reps? IC has given policy adjustments and extended warranties in certain situations.
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BUSMAN5
Active Member
United States
17 Posts |
Posted - 08/09/2011 : 4:22:13 PM
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quote: Originally posted by RichBusman
Have you been in touch with your IC regional reps? IC has given policy adjustments and extended warranties in certain situations.
Our dealer Rush Truck Center in GA has offered an extended warranty at a specified amount per bus. We are considering this now but nothing has been approved at this point. Not sure about from IC. |
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Bus Tech II
Senior Member
121 Posts |
Posted - 08/10/2011 : 06:20:35 AM
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HAHAHA, I have a low oil pressure one torn apart right now. Something went through the low pressure oil pump and scored the pump up bad. I am in the process of changing the pump and pressure relief valve. I will update if i have do go further. |
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BUSMAN5
Active Member
United States
17 Posts |
Posted - 08/10/2011 : 09:30:08 AM
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quote: Originally posted by Bus Tech II
HAHAHA, I have a low oil pressure one torn apart right now. Something went through the low pressure oil pump and scored the pump up bad. I am in the process of changing the pump and pressure relief valve. I will update if i have do go further.
We've got one too. Its probably all the metal from the valve train getting into the pump. We always replace the front cover because the metal will score it up and it wont build pressure. |
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jeepcjron
Advanced Member
USA
262 Posts |
Posted - 08/10/2011 : 7:38:11 PM
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what went through the oil pump is most likley the needle bearings from a failed lifter. the vt engines do not like extended oil intervals. if you have a push rod issue you need to verify the lifter and cam are in good shape or you will have another failure.
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its like a slinky! useless but fun to watch. |
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Fastback
Top Member
1500 Posts |
Posted - 08/11/2011 : 07:11:02 AM
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One of the achilles heals of the VT365 is the large quantity of oil (3-4 quarts) that never drains out during an oil change. Just one extended drain interval can start the cycle of damage. It can be even worse for the engine in the Ford applications as that gallon of used oil only gets diluted with 3 3/4 gallons of fresh oil during a change as opposed to the 4 3/4 gallons in the VT365. |
Why yes, the ORIGinal CHARGER is a Fastback |
Edited by - Fastback on 08/11/2011 07:12:04 AM |
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