1. How would you know if the rear oil seal is leaking on the ISB 4.5 Cummins engine?
If you have a damaged rear oil seal, you will notice the following: oil dropping from the bell housing, oil spots under the application, clutch slippage, especially on manual transmission,n, and odor of oil burning.
2. Can the rear oil seal be replaced without removing the transmission?
The answer is no. You cannot remove the oil seal without removing the transmission.
However, if you don’t want to remove the transmission, you have to remove the engine.
3. How to know if you are having a bad crankshaft in ISB Cummins?
These are the symptoms of a bad crankshaft;
a. Excessive vibration
b. Knocking sound from the engine
c. Visible damage to the crankshaft journal
d. Low oil pressure
e. Metal shavings in the oil
4. Can the crankshaft be reused during a rebuild?
The answer is yes, you don’t have to replace the crankshaft during the engine rebuild. However, you have to do a crankshaft inspection to ascertain the condition of the crankshaft journal.
If there is no serious defect on the crankshaft, then you don’t have to replace the crankshaft.
5. What are the common signs of a failing vibration damper on ISB Cummins?
Having a failing vibration damper, you will notice signs such as strange engine vibration, which sometimes may include the cab, noise coming from the front of the engine, visible wobbling of the damper, and frequent broken belts.
With these signs, you should replace the vibration damper.
6. Can the damper rubber be repaired or rebuilt?
It is advisable to replace the damper rubber rather than repair or rebuild.
Replace the old one with the new one.
7. What causes premature failure oon the Cummins ISB 4.5 water pump?
These are the most common causes of failure of of the water pump in Cummins ISB;
a. Poor installation such as over torque
b. Corrosion in the cooling system
c. Irregular coolant change
d. Usage of wrong coolant
8. Can I replace the water pump myself?
Yes, you can replace the water pump if you have mechanical experience. Ensure you have the tools, the torque spec, the new water pump, and the coolant.
9. What causes damage to the EGR cooler?
These are the causes of damage to the EGR cooler;
a. Carbon buildup that clogged the passage
b. High exhaust temperature that causes thermal stress
c. Corrosion from the coolant
10. Can a clogged EGR cooler be cleaned or replaced?
It is better to replace a clogged EGR cooler than to clean it. If the clog is minimal, you clean it, but if it is seriously clogged, you have to replace it.