C4.4 Industrial Engine After Stopping Engine Caterpillar

After Stopping Engine

Note: Before you check the engine oil, do not operate the engine for at least 10 minutes. This period will allow the engine oil to return to the oil pan.

------ WARNING! ------

Contact with high pressure fuel may cause fluid penetration and burn hazards. High pressure fuel spray may cause a fire hazard. Failure to follow these inspection, maintenance and service instructions may cause personal injury or death.


  • After the engine has stopped, you must wait for 10 minutes in order to allow the fuel pressure to be purged from the high-pressure fuel lines before any service or repair is performed on the engine fuel lines. The 10 minute wait will also allow static charge to dissipate from the low-pressure fuel system. If necessary, perform minor adjustments. Repair any leaks from the low-pressure fuel system and from the cooling, lubrication, or air systems. Replace any high-pressure fuel line that has leaked. Refer to Disassembly and assembly Manual, "Fuel Injection Lines - Install".

  • Check the crankcase oil level. Maintain the oil level between the "MIN" mark and the "MAX" mark on the engine oil level gauge.

  • If the engine is equipped with a service hour meter, note the reading. Perform the maintenance that is in the Operation and Maintenance Manual, "Maintenance Interval Schedule".

  • Fill the fuel tank, in order to help prevent accumulation of moisture in the fuel. Do not overfill the fuel tank.


Only use antifreeze/coolant mixtures recommended in this Operation and Maintenance Manual, "Refill Capacities and Recommendations" topic or in this Operation and Maintenance Manual, "Fluid Recommendations" topic. Failure to do so can cause engine damage.

------ WARNING! ------

Pressurized System: Hot coolant can cause serious burns. To open the cooling system filler cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pressure.


  • Allow the engine to cool. Check the coolant level.

  • Check the coolant for correct antifreeze protection and the correct corrosion protection. Add the correct coolant/water mixture, if necessary.

  • Perform all required periodic maintenance on all driven equipment. This maintenance is outlined in the instructions from the OEM.