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bwest
Administrator
United States
3820 Posts |
 Posted - 04/07/2009 : 11:42:45 AM
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This is the text from a bulletin from my BB dealer. If you are a customer of Centeral States I would encourage you to sign up for these free e-mail bulletins.
PREVENTIVE MAINTENANCE ITEM:
It is necessary to periodically unplug the connector at the low coolant probe and inspect for coolant contamination on the affected vehicles.
PROBLEM:
Coolant contamination of the engine harness may result in damage to the engine ECM. If contamination is not detected in time, coolant can travel throughout the harness causing damage to the engine ECM.
VEHICLES AFFECTED:
2007 - 2009 Visions and All Americans equipped with Cat and Cummins engines.
PROBABLE CAUSE:
The low coolant probe in the radiator surge tank may be leaking internally through the connector.
SOLUTION:
The low coolant probe must be replaced.
--------------------------------------------------------------------------------
Call us toll free at
1-800-825-8273
to order
Blue Bird Part # 0106490.
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Edited by - bwest on 04/07/2009 12:25:56 PM
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Wolf0r
Top Member
USA
2181 Posts |
Posted - 04/07/2009 : 2:50:37 PM
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| I'll have to check all mine for this. |
“The good thing about science is that it's true whether or not you believe in it.”
Neil deGrasse Tyson |
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Mechan1c
Top Member
USA
853 Posts |
Posted - 04/07/2009 : 6:18:05 PM
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| I'd rather see a repair connector/pigtail that plugs in but stops coolant intrusion along with an updated probe. Or, maybe a drain??? Maybe a secondary coolant sensor halfway up the harness to the ECM that caused a forced regen that dries up the coolant!! |
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bwest
Administrator
United States
3820 Posts |
Posted - 04/07/2009 : 7:37:20 PM
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Are you saying this causes a regen? I'm not sure I know what you are talking about on your last line Mechan1c.
The new sensor is surely redesigned to stop this problem isn't it? |
Bryan |
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Mechan1c
Top Member
USA
853 Posts |
Posted - 04/08/2009 : 07:57:51 AM
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| No, I was attempting some shop humor...sorry. I need to work on my delivery. |
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bwest
Administrator
United States
3820 Posts |
Posted - 04/08/2009 : 08:29:06 AM
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OK, Sorry I missed that. |
Bryan |
Edited by - bwest on 04/08/2009 10:21:58 AM |
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Thomasbus24
Administrator
USA
4547 Posts |
Posted - 04/08/2009 : 3:44:15 PM
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Remember when the bus drivers used to check things and you didn't need a low coolant sensor?
Yeah I don't remember either. |
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Thomas Ford 85-16
Top Member
USA
4177 Posts |
Posted - 04/09/2009 : 05:14:40 AM
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| I check my coolant, but like to have the light in case something happens on the road. If you start to lose it out on the road, that sensor would help you to know. |
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origcharger
Top Member
United States
619 Posts |
Posted - 04/09/2009 : 05:38:52 AM
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quote:
Originally posted by Thomasbus24
Remember when the bus drivers used to check things and you didn't need a low coolant sensor?
Yeah I don't remember either.
True, but they used to be able to operate their buses until they got no heat out of the heaters, then add 2 gallons of coolant, fix a leak and nothing was hurt.
Today if you would do that you would likely be replacing the EGR cooler and the electronic engine monitoring would give manufacturers justification for warranty denial. |
Operating; Seven T444Es, One MaxxForce 7, One VT365, Four DT466s, One E-450 6.0 and one Mercedes in a C2. |
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Thomasbus24
Administrator
USA
4547 Posts |
Posted - 04/10/2009 : 1:43:04 PM
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| Yeah, both good points (loss while driving and emissions). For what it's worth I added low coolant lights to our specs in 2002. |
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Wolf0r
Top Member
USA
2181 Posts |
Posted - 04/16/2010 : 09:29:35 AM
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| I just got back from the Cummins dealer. One of their techs and I were trying to diagnose a random high idle condition. I sent it to Cummins because I thought it was an ECM problem. The bus would go into high idle and would not quit, no throttle, hitting the brake did not stop it, flicking the switch no effect either. After a bit of isolation we determined the orange high idle wire was getting grounded by liquid. We ended up disabling the PTO with insite for now. More to come when I get authorization to fix it. |
“The good thing about science is that it's true whether or not you believe in it.”
Neil deGrasse Tyson |
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Wolf0r
Top Member
USA
2181 Posts |
Posted - 04/16/2010 : 09:46:05 AM
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| New coolant probe part# 10015356 |
“The good thing about science is that it's true whether or not you believe in it.”
Neil deGrasse Tyson |
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IBTMech
Top Member
USA
973 Posts |
Posted - 04/16/2010 : 4:01:46 PM
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| Years ago, GM coolant sensor leaks were a big problem. The leak would find it's way back to the ECM causing all kinds of interesting issues. |
If it doesn't fit, FORCE it.
If it breaks, well, it needed replacing anyway.
Pullin' wrenches for 45 years. |
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L.J.D
Senior Member
United States
173 Posts |
Posted - 04/19/2010 : 06:25:31 AM
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| Is BB goning to warranty these sensors, i have a bad one now. |
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Wolf0r
Top Member
USA
2181 Posts |
Posted - 04/19/2010 : 07:05:49 AM
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quote:
Originally posted by L.J.D
Is BB goning to warranty these sensors, i have a bad one now.
I think so. I would call your dealer and get it documented so they can order parts. Like 500+ on backorder.  |
“The good thing about science is that it's true whether or not you believe in it.”
Neil deGrasse Tyson |
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Wolf0r
Top Member
USA
2181 Posts |
Posted - 04/20/2010 : 12:21:26 PM
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| Sensor = 56 bux |
“The good thing about science is that it's true whether or not you believe in it.”
Neil deGrasse Tyson |
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Wolf0r
Top Member
USA
2181 Posts |
Posted - 04/28/2010 : 06:39:11 AM
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| 2 hrs diagnose and 2 hrs to change harness and sensor is what BB pays. Too bad I didn't get this one, they let Cummins do it. It's fixed anyway. |
“The good thing about science is that it's true whether or not you believe in it.”
Neil deGrasse Tyson |
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Topic |
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Coolant probe leak on 07-09 Blue Birds
