Fuel in Oil Pan 3gm30f? - Page 2

Hyprdrv · 26-06-2009, 05:21

PS the good news is your motor is probably real clean on the inside!! Let us know if that was the problem.

Good Luck,
Steve

Örjan · 26-06-2009, 05:21

Quote:

Originally Posted by Taffy

Hi,

There are not many parts in the fuel system and these are the last in the chain. I was thinking that the unused fuel is not getting back to the tank.

How about the fact that the fuel injectors must be within 3% of each other. If over 3% the engine output will drop and/or one cyliner will overheat. There is an injector volume adjustment plate on the side of the pump body.

Or one of your injection nozzels is sticking/ not fully closing.

If the fuel does not get back to te tank . How would it get to the sump?
Is there a connection there that I have missed?

meyermm · 26-06-2009, 05:23

The amount of fuel getting into the sump sounds way to much for overfueling and passing the rings. As well the engine would be running very badly and black smoking real bad. Not familiar with fuel system but a lift pump diaghram if fitted sounds much more likely as Steve suggested. Even blocked return lines (injector) etc would still not account for that amount of fuel.

donradcliffe · 26-06-2009, 10:36

Two ways fuel gets into the oil sump. A cracked diaphragm on the lift pump and worn/damaged seals in the high pressure pump (which has engine oil running through it for lubrication). The second is more common, but the first is cheapest to fix.

Cheechako · 26-06-2009, 10:54

fuel can get into the sump with a bad diapragm in the mechanical fuel pump right?

Hyprdrv · 26-06-2009, 10:55

Yup.
Steve

Chief Engineer · 26-06-2009, 19:48

Usually the culprit is the fuel lift pump.

Second, if an injector tip is damaged it will squirt fuel into the cylinder, it can make it past the rings or blow past the valve seals.

Injector pump seals gone bad.....must be done in a shop.

#1 is most like the one

meyermm · 26-06-2009, 21:14

Quote:

Originally Posted by Chief Engineer

Usually the culprit is the fuel lift pump.

Second, if an injector tip is damaged it will squirt fuel into the cylinder, it can make it past the rings or blow past the valve seals.

Injector pump seals gone bad.....must be done in a shop.

#1 is most like the one

If the injector is damaged the engine would misfire and that has not been mentioned that I can remember?

Örjan · 11-07-2009, 15:28

Unfortunately the lifter pump is fine but the high pressure pump is not (expensive), well , well any ways the problem will be solved (will get the pump back from the shop on tuesday) cross my fingers ......
can finally go on holiday! (I hope).....

DWT · 11-07-2009, 16:29

The seal on the bottom of the injector pump was leaking on mine, pumping fuel into the crank case. Removed the pump, sent it off to be rebuilt and that took care of it.

The repair shop told me that the seals had dried up from using to much fuel additive. I had just bought the boat so I did not know. I never use the stuff.

Örjan · 11-07-2009, 16:42

Quote:

Originally Posted by DWT

The seal on the bottom of the injector pump was leaking on mine, pumping fuel into the crank case. Removed the pump, sent it off to be rebuilt and that took care of it.

The repair shop told me that the seals had dried up from using to much fuel additive. I had just bought the boat so I did not know. I never use the stuff.

That was it . I do not know about the additives but it definetly pumped the fuel into the crank case.
I will ask the shop guy about the additives.

Örjan · 11-07-2009, 16:45

Quote:

Originally Posted by meyermm

If the injector is damaged the engine would misfire and that has not been mentioned that I can remember?

i guessed I missed that crucial info in the thread. Yes it did only fire on two out of three cylinders.....

11-07-2009, 15:28	#24
Örjan Registered User Join Date: Jun 2009 Location: sweden Boat: jeannau sun fast 36 Posts: 22	Unfortunately the lifter pump is fine but the high pressure pump is not (expensive), well , well any ways the problem will be solved (will get the pump back from the shop on tuesday) cross my fingers ...... can finally go on holiday! (I hope)..... __________________ Thanks! Örjan Sterner

11-07-2009, 16:29	#25
DWT Registered User Join Date: Mar 2007 Posts: 135	The seal on the bottom of the injector pump was leaking on mine, pumping fuel into the crank case. Removed the pump, sent it off to be rebuilt and that took care of it. The repair shop told me that the seals had dried up from using to much fuel additive. I had just bought the boat so I did not know. I never use the stuff. __________________ David 69Morgan30' CarolAnn

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26-06-2009, 05:21	#16
Hyprdrv Registered User Join Date: Apr 2007 Location: Centreville, VA Boat: Lagoon 410 ELECTRIC! Posts: 116	PS the good news is your motor is probably real clean on the inside!! Let us know if that was the problem. Good Luck, Steve

26-06-2009, 05:23	#18
meyermm Registered User Join Date: Dec 2007 Location: Brisbane Boat: Peterson 44 Posts: 181	The amount of fuel getting into the sump sounds way to much for overfueling and passing the rings. As well the engine would be running very badly and black smoking real bad. Not familiar with fuel system but a lift pump diaghram if fitted sounds much more likely as Steve suggested. Even blocked return lines (injector) etc would still not account for that amount of fuel.

26-06-2009, 10:36	#19
donradcliffe Registered User Join Date: Mar 2007 Location: Santa Cruz for summer Boat: Beneteau First 456 Posts: 648	Two ways fuel gets into the oil sump. A cracked diaphragm on the lift pump and worn/damaged seals in the high pressure pump (which has engine oil running through it for lubrication). The second is more common, but the first is cheapest to fix.

26-06-2009, 10:54	#20
Cheechako Registered User Join Date: Aug 2006 Location: Skagit City, WA Boat: Fellippi 32 Posts: 2,205	fuel can get into the sump with a bad diapragm in the mechanical fuel pump right?

26-06-2009, 10:55	#21
Hyprdrv Registered User Join Date: Apr 2007 Location: Centreville, VA Boat: Lagoon 410 ELECTRIC! Posts: 116	Yup. Steve

26-06-2009, 19:48	#22
Chief Engineer Registered User Join Date: Aug 2006 Location: North of Baltimore Boat: Ericson 27 & 18' Herrmann Catboat Posts: 2,004	Usually the culprit is the fuel lift pump. Second, if an injector tip is damaged it will squirt fuel into the cylinder, it can make it past the rings or blow past the valve seals. Injector pump seals gone bad.....must be done in a shop. #1 is most like the one