Troubleshooting

High jacket water temperature at cylinder outlet for all units –

  1. Jacket cooling water temperature controller defective
  2. The jacket water cooler is ineffective (due to a choked cooler, less cooling media, etc.)
  3. The discharge pressure of the jacket cooling water pump is low
  4. The engine is overloaded.

 

High jacket water temperature at cylinder outlet for the individual unit –

  1. Jacket water outlet line valves of the affected cylinders are shut or defective.
  2. Cooling spaces are insufficiently vented.
  3. Cooling water pipes or water passages choked.
  4. Overloading of affected cylinders.
  5. Piston running hot.
  6. Exhaust gases blow into the cooling water circuit due to a defect (cylinder liner, cylinder head, valve, and cage).

 

Jacket cooling water pressure fluctuates

  1. Air collecting in the cooling spaces or in the pipes due to insufficient venting.
  2. A drop of static pressure at the inlet to the cooling water pump due to throttling in the return pipe or draining of the expansion tank.
  3. Exhaust gases blowing into the cooling water due to a defect (cylinder liner, cylinder head, valve

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