|
Brad Barker
Administrator
USA
874 Posts |
 Posted - 09/16/2013 : 6:14:39 PM
|
Prior to 2013 coolant level sensors were an option in RE Navistar buses. These could have been left off your bus inadvertently by the individual who writes your bus specifications at your dealership. The harness is in place along with the coolant level module. The only thing which may be missing is the sensor in the radiator surge tank.
If you do not have this sensor on your bus there is no audible or visible warning in the drivers compartment to indicate low coolant.
If you are experiencing repeated EGR cooler failures this could be the cause.
A more serious problem can be hydrolocking of the engine by injested coolant. This will cause internal engine damage. Be cautious if you find EGR cooler failure. If the bus does not seem to run smooth after replacing the cooler, two tests should be run, a relative compression test using ServiceMaxx software followed by a cylinder performance analyzer test. If one or more cylinders is showing defective, measuring piston height on each cylinder is recommended.
The sensors run around $35 each. After installing the sensor, ecm programming is required. Change the Engine Warning and Protection System parameter 77002 to level 1 and program the ecm. This will tell the ecm to watch for low coolant and trigger the MIL light, audible alarm and Stop Engine lamp.
If you have any questions or need more detail please contact me. |
|
IC Coolant Level Sensors
