Usage:
Air in Fuel System...With air in the fuel system the engine will normally be difficult to start, run rough and release a large amount of white smoke. Remove the air from the fuel system. See FUEL SYSTEM PROBLEMS.
Valve Adjustment Not Correct...Check and make necessary adjustments. See VALVE LASH ADJUSTMENT.
Fuel Injection Timing Not Correct *
Automatic Timing Advance Does Not Operate Correctly *
Defective Fuel Nozzle(s)...Find a defective nozzle by running engine at the rpm range where it runs rough. Loosen the fuel line nut at the cylinder head enough to stop fuel supply to that cylinder. Each cylinder must be checked this way. If a cylinder is found where loosening of the nut makes no difference in the rough running, test the nozzle for that cylinder. To test a nozzle, remove the nozzle from the engine and test. *
Valve Leakage; Wear or Damage to Pistons and/or Piston Rings; Wear or Damage to Cylinder Walls...Check with the cylinder leakage tester. If leakage is over specification and leaking is heard at the air inlet to the engine (intake valve leaks), exhaust manifold (exhaust valve leaks), or at the oil filler opening (leaking past piston rings). *
Cylinder Head Gasket Leakage...Check with the cylinder leakage tester. If leakage is higher than specification, check at the fuel nozzle hole of the next cylinder to see if the leak is between cylinders. Leakage at the cylinder head gasket can show as an outside leak or can cause loss of coolant through the radiator overflow.
Engine Camshaft Timing Not Correct. *
Wrong Pistons or Crankshaft Installed in the Engine...If pistons are for a longer stroke engine (short pistons) or if the crankshaft is for a shorter stroke engine, there is not enough compression for good combustion. *
Fuel Injection Pump Incorrectly Adjusted, Wear or Assembled Wrong. *
*Authorized dealers are equipped with the necessary tools and personnel familiar with disassembly and assembly procedures to perform these services.