Why is there oil in my diesel fuel?
Why is there oil in my diesel fuel?
Based on your finding of diesel in your engine’s oil, your theory of the problem being an injector/nozzle seal or cup is probably correct. But you, or the shop that will work on the engine, needs to discover “the smoking gun.” Some engines may have a crack in their cylinder head which could cause this same problem.
What characteristic of diesel fuel indicates how well a diesel engine will start?
Pure cetane represents the highest purity of diesel fuel possible, and thus has a cetane rating of 100. The main difference between cetane and octane ratings is that the octane rating represents how well a fuel can resist pre-ignition due to compression—ensuring the fuel ignites only from a spark from the spark plug.
When does diesel fuel get into the oil?
When that seal leaks, diesel gets into the oil. Do you know anything about this problem? Based on your finding of diesel in your engine’s oil, your theory of the problem being an injector/nozzle seal or cup is probably correct. But you, or the shop that will work on the engine, needs to discover “the smoking gun.”
What causes a fuel pump to fail on a diesel engine?
Normally the fuel pump fails due to internal parts being worn due to contamination (see Contamination) or by your fuel pump breaking up internally which causes metal swarf to enter the fuel system.
How does diesel fuel enter the lubrication system?
There are three possible routes for fuel to enter the lubrication system Fuel lift pump – The diaphragm can split providing a route for diesel to enter the engine crank case. Injector pump – Injector pump shaft seals have been known to fail.
What causes diesel fuel to mix with engine oil on my old generator?
Without knowing anything about the engine on your ‘old’ generator, I’d predict that a seal is leaking on your mechanically driven injector pump. The pump shaft seal communes with the crankcase and that’s where the leaking diesel fuel is going.
When that seal leaks, diesel gets into the oil. Do you know anything about this problem? Based on your finding of diesel in your engine’s oil, your theory of the problem being an injector/nozzle seal or cup is probably correct. But you, or the shop that will work on the engine, needs to discover “the smoking gun.”
There are three possible routes for fuel to enter the lubrication system Fuel lift pump – The diaphragm can split providing a route for diesel to enter the engine crank case. Injector pump – Injector pump shaft seals have been known to fail.
Why does my diesel engine run so long?
If the fuel valve/outlet has a strainer, it might be clogged. If it doesn’t, the outlet opening might be clogged. In either case, the engine gets enough fuel to run for awhile, then is starved for fuel. Stop the tractor for 15-30 minutes, it starts and runs fine until it is starved again.
Normally the fuel pump fails due to internal parts being worn due to contamination (see Contamination) or by your fuel pump breaking up internally which causes metal swarf to enter the fuel system.
