Breakdown Information
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Forum Discussion
Cummins ISB 5.9L
Allison 4 Spd
Friday:
ISB Overheated: Temps rose. High temp light on. Check engine light on. Power loss. Shut down in parking lot. Coolant blew, along with soft plug and overflow tank.
Conclusion: Water pump belt broke. Belt replaced. Added coolant, new overflow resevoir, added coolant, brought to temp. Temp stable.
Saturday:
Same symptons. Pulled onto scenic pull out.
Conclusion: Water pump probably failed (impeller?)
Will report on the rest as known.
Moral: Always carry spares belts!
Conclusion:: Water pump gone. Replaced along with thermostat.
Allison 4 Spd
Friday:
ISB Overheated: Temps rose. High temp light on. Check engine light on. Power loss. Shut down in parking lot. Coolant blew, along with soft plug and overflow tank.
Conclusion: Water pump belt broke. Belt replaced. Added coolant, new overflow resevoir, added coolant, brought to temp. Temp stable.
Saturday:
Same symptons. Pulled onto scenic pull out.
Conclusion: Water pump probably failed (impeller?)
Will report on the rest as known.
Moral: Always carry spares belts!
Conclusion:: Water pump gone. Replaced along with thermostat.
