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Fuel get in oil engine

My Caterpillar engine 3304 problem was fuel get in oil engine

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Posted on Mar 12, 2010

  • okello henry francis Mar 21, 2010

    pump gp is the plunger and barrel fit in the pump housing.



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Causes for excessive fuel consumption in caterpillar D398 Engine

V12 twin turbo with 2x 6cylinder injector pumps.

Excessive fuel consumption can be ...
fuel leak on to the ground.. Obvious
fuel leak into sump via fuel pump body... Check sump oil
worn piston rings... Grey Smoke
glazed cylinder walls...smoke
burnt valves... Need compressin test
faulty turbo(s)... Sound, check manifold pressures
blocked exhaust line/muffler... Smoke black
faulty thermostat so motor doesn't get up to temperature, what is motor temperature ? ... Smoke black
lack of oil, wrong grade of oil for temperature
scavenge fuel line from injectors blocked or not returning to tank
faulty injector(s) causing poor fuel spray
faulty injector(s) bleeding fuel into cylinders... Smoke black
faulty injector pump balance
faulty injector pump timing
faulty coupling between injector pumps, even can be one 180deg out of timing
bad diesel fuel

Are there mechanical losses in motor load ? Alternator fault ? or gearbox fault prop fault ?

What is the exhaust colour ? Black or grey ?
What are the inlet manifold pressures ?
Using a thermometer ( IR if available ) what are the cylinder head or exhaust manifold temperatures ? This may isolate problem to one or more cylinders.

If you can supply more information I may be able to help track down the problem.


Apr 02, 2015 | Caterpillar D398 marine engine - 1200 rpm

3 Answers

How to test caterpillar c18 acert low oil pressure shut down

This is a critical element to protect the engine. Shop manual is needed. You can try but they may not have it.
So ask the dealer or MFG for one.

Mar 15, 2015 | Caterpillar C18 ACERT Marine Generator Set...

1 Answer

White smoke on start up ,

white smoke from the tailpiple is a tell tale sign of a shot head gasket. im not sure how your fuel pump is related, but, if you indeed have a bad head gasket, you could brick your engine with further attempts to restart.

examine your radiator fluid for an oily film, and examine your oil dipstick for any bubbles, or other signs of oil and water mixing- these are often symptoms of a blown head gasket.

Aug 26, 2014 | Metra 99-3304 Chevy/pontiac/saturn/buick...

1 Answer

What is error code F-85

There isn't one listed.

71 Timer stop idling
75 Oil temperature sensor circuit hydraulic steering system
The pressure sensor 81 at the inlet trap foreign particles
82 Pressure Sensor
84 speed sensor
91 Accelerator pedal position sensor
94 Pressure Sensor fuel pumping
95 The differential pressure sensor on the fuel filter

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1 Answer

Why would the engine oil be getting hot enough to set off low oil /shutdown

1. check and wash rediator

2. check thermostat valve working properly

3. check valve tiiming and fuel consumtion
4. otherwise engine needs complete bore

May 06, 2014 | Caterpillar 3406 Engine

2 Answers

Oil and fuel mixing.

you need to clean out the sump air vent. and change the filter for the air breather. some are fitted with a clean easy filter you take off and wash out.

Jan 23, 2014 | Caterpillar 3306T Generator Set

3 Answers

My 3406b caterpillar engine is having excessively high oil levels

Time to find out why your oil level is going up.
Either coolant in the oil, or fuel in the oil.
Which ever it is the cat engine is not happy. My suggestion would be to get an oil sample test.
Any major diesel repair place will help. Just a little oil in a sterile jar to be analyzed for contaminants.
Coolant is the worst as it will scour the bearings.
Good thing you are concerned.

Dec 02, 2010 | Ford F-450 Cars & Trucks

2 Answers

I'm working on a 3126 cat engine. Problem oil in the fuel tank. Would would cause this? I already reseal all 6 six injectors. Need help... Thanks

Sounds like high pressure oil used to actuate the injectors is bypassing one or more injectors internally. There was an issue with this on engines with 7AS / 8YL serial number prefixes. There is no real way of isolating the problem, so the fix would be to replace all six injectors.

Mar 25, 2009 | Caterpillar American Construction...

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