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busmaster54
Active Member
United States
21 Posts |
 Posted - 02/09/2017 : 12:33:36 PM
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| We are having issues with a 2015 IHC with the ISB 6.7 Cummins crankcase breather tube freezing up with ice. That creates issues with back pressure and can blow turbo seals etc. Cummins has sent out a TSB in regards to the problem and say its a maintenance issue and not covered under warranty. Their fix is a Upfit kit #5314954, which is a heater kit for the tube and breather filter. Cost $583.48 for parts, $292.00 for dealer install, and $26.40 for Misc. Anybody else have this problem? Sounds like a design problem to me, Cummins will not warranty anything if this causes engine problems, and they say its not a warranty thing |
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eddo
Advanced Member
USA
311 Posts |
Posted - 02/09/2017 : 1:01:10 PM
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Same part is available on ebay for $90.
I live in the desert, so this is not an issue for me.
Is this heater an available option at purchase? If not, then I would learn more towards it being a design flaw. If it is, then maybe it should be spec'ed in in colder climates?
How cold is it getting where you are? I have 5 of these engines... lol |
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Fastback
Top Member
1500 Posts |
Posted - 02/10/2017 : 05:08:33 AM
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| I believe I remember being told to try cutting the bottom end of the vent tube at an angle with long side to front of bus. |
Why yes, the ORIGinal CHARGER is a Fastback |
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torque
Advanced Member
Canada
358 Posts |
Posted - 02/10/2017 : 08:47:43 AM
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LOL, figures, cheaper in an areas that doesn't need them.
Just curious do you use winter fronts?. We had problems a couple years ago when it was -30C for a couple months, we put winter fronts on, more for better heat and have not had any problems since with the breather freezing but at the same time the last couple of winters have not been as cold, lows now and then -20C and the odd -25C. |
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busmaster54
Active Member
United States
21 Posts |
Posted - 02/10/2017 : 09:20:45 AM
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Eddo: We get temps to minus 30 plus sometimes, and with this issue they say any time it gets below freezing this can happen. Our dealer service manager said they would like to work with Navistar to make this a plant installed option and then recommend the option to the customer in cold climate. To me this is a design flaw and should be taken care of at the Cummins Plant.
Fastback: They do recommend cutting the tube at a angle of 45 with the open side of the tube toward the rear or engine on highway engines and toward the engine on off Highway engines.
Torque: Yes winter fronts are a standard order on a new bus, we have them on all machines here. With the deep snow this year, the problem has become worse. |
Edited by - busmaster54 on 02/10/2017 09:23:44 AM |
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Crankcase breather tube freezing ISB6.7
