Not your typical engine problem...

[colt45]

I have a diesel ride and here are some of the observations:

1. Oil level increases significantly after a month or so because of fuel contamination. About 4 liters of fuel is being added to the engine oil after 2 months.

2. No overheating.

3. White smoke during start-up, but decreases after a few minutes of driving.

4. With the raiadtor cap removed, water spews out.

5. Water level in the radiator remains the same.

6. No oil traces in the radiator coolant.

Weird?

[alwayz_yummy]

top overhaul.

[theveed]

Weird... #4, 5 and 6 should result to #2.

[yebo]

it's not weird at all if you start thinking that there is not one problem but several at the same time. consider the sysptoms individually or group logically and go from there. sabi nga, when confused, keep the solution simple.

1 -- you have a leaking injector. rectify this right away since diluted oil leads to premature wear.

2-6 -- there is a very small leak on the cylinder head gasket BUT it is a leak only between one cylinder to a water passage. that is why there is no oil in the water. since the leak is small, probably just a gasket that is not seating right, then when the engine warms up it seals itself close. this is why the white smoke disappears after the engine warms up and the engine does not overheat. don't wait for the leak to grow bigger. have the cylinder head removed and checked.

[turbo]

The Fuel injection pump is being lubricated by the high pressure engine oil. When the seals of the pump wear out, the higher pressure of the diesel injection contaminates the oil. So it is the diesel fuel intrusion that increases the volume of oil within the engine. Diesel fuel does not have the additives of the lubicant much less the right viscosity of oil. Prolong use will lead to worn out bearings that will lead to spun bearing. DISASTER.

Check your oil and it is thinner(less viscous) than what it is supposed to be.

[colt45]

it's not weird at all if you start thinking that there is not one problem but several at the same time. consider the sysptoms individually or group logically and go from there. sabi nga, when confused, keep the solution simple.

1 -- you have a leaking injector. rectify this right away since diluted oil leads to premature wear.

2-6 -- there is a very small leak on the cylinder head gasket BUT it is a leak only between one cylinder to a water passage. that is why there is no oil in the water. since the leak is small, probably just a gasket that is not seating right, then when the engine warms up it seals itself close. this is why the white smoke disappears after the engine warms up and the engine does not overheat. don't wait for the leak to grow bigger. have the cylinder head removed and checked.

Thank you sir. Regarding #1, i see two possible causes. It's either the injectors are leaking or the leak is coming from the injection pump, as what Mr. Turbo said. If the injectors are leaking, is there a possible oil dilution? Isn't it that the injectors are directed inside the combustion chamber? Sorry for asking.

[colt45]

The Fuel injection pump is being lubricated by the high pressure engine oil. When the seals of the pump wear out, the higher pressure of the diesel injection contaminates the oil. So it is the diesel fuel intrusion that increases the volume of oil within the engine. Diesel fuel does not have the additives of the lubicant much less the right viscosity of oil. Prolong use will lead to worn out bearings that will lead to spun bearing. DISASTER.

Check your oil and it is thinner(less viscous) than what it is supposed to be.

This is exactly what a calibration center told me. But i was inclined not to believe them right away beacuse i was still considering other sources of oil contamination. like valve seal failure, injector leaks, etc.

[alwayz_yummy]

owner naman naoverhaul kasi napabayaan ang fuelpump...lumiyab at nadisplace ang oil, so machine shop!

cause: oilseal ng fuel pump leaked!

3au owner po namin.wag mo na paabutin sa ganun.

[Betz]

Most definitely Head gasket problem!

[4JGtootsie]

Agree ako kay Yebo.

kung short trips ka lang you might not notice the overheating. Another reason na hindi ka nag ooverheat is maybe the diesel fuel in the oil serves as a coolant. Good for cooling but not for lubrication. My advise is top overhaul. Prolong use might cost you a general overhaul.

[Jayo]

The Fuel injection pump is being lubricated by the high pressure engine oil. When the seals of the pump wear out, the higher pressure of the diesel injection contaminates the oil. So it is the diesel fuel intrusion that increases the volume of oil within the engine. Diesel fuel does not have the additives of the lubicant much less the right viscosity of oil. Prolong use will lead to worn out bearings that will lead to spun bearing. DISASTER.

Check your oil and it is thinner(less viscous) than what it is supposed to be.

Ano pong sasakyan? AFAIK, applicable ito sa mga in-line injection pumps. Rotary ip uses diesel as lubricant and coolant.

[colt45]

Ano pong sasakyan? AFAIK, applicable ito sa mga in-line injection pumps. Rotary ip uses diesel as lubricant and coolant.

rotary type ang injection pump nya. Does it mean i can rule out injection pump leak?

[colt45]

Ano pong sasakyan? AFAIK, applicable ito sa mga in-line injection pumps. Rotary ip uses diesel as lubricant and coolant.

Bosch VE distributor-type ang ip nya. Rotary po ito di ba?

[Jayo]

Bosch VE distributor-type ang ip nya. Rotary po ito di ba?

The most common rotary ip around. Engine oil does not lubricate it, your diesel fuel does. Leaking injectors may be a cause, do you hear "fuel knock". What about the exhaust, excessive black smoke? Also, do you let service station personnel check your engine fluids when you gas up?

[colt45]

The most common rotary ip around. Engine oil does not lubricate it, your diesel fuel does. Leaking injectors may be a cause, do you hear "fuel knock". What about the exhaust, excessive black smoke? Also, do you let service station personnel check your engine fluids when you gas up?

I don't let gas station attendant mess with my engine. I'm monitoring the oil level daily and still noticing the level continuously increase a bit everyday. No black smoke, it's actually white during cold start-ups.

The calibration center i've consulted immediately gave a verdict that it's the fuel pump. But if it's a rotary type, there's no way fuel would leak from the ip to the crankcase.

[turbo]

Well if it is the rotary-type, it may not be lubicated by the engine.

But you are still not out of it, the pump is driven by the engine itself. The SHAFT SEAL is your culprit. It is leaking diesel fuel into your engine.

It is not your nozzles, leaking nozzles cannot fill up the pan that fast because the excess diesel will be moved out of the chamber as very black smoke. Incomplete combustion because the ideal air-fuel ratio will be exceeded.

[colt45]

Well if it is the rotary-type, it may not be lubicated by the engine.

But you are still not out of it, the pump is driven by the engine itself. The SHAFT SEAL is your culprit. It is leaking diesel fuel into your engine.

It is not your nozzles, leaking nozzles cannot fill up the pan that fast because the excess diesel will be moved out of the chamber as very black smoke. Incomplete combustion because the ideal air-fuel ratio will be exceeded.

I think this is the most plausible explanation. leak from the ip shaft seal seeping through the o-ring going to the timing gear case, where it mixes with the oil used to lubricate the timing gears , down to the crankcase. You're good turbo, real good. Thanks.

[Jayo]

I think this is the most plausible explanation. leak from the ip shaft seal seeping through the o-ring going to the timing gear case, where it mixes with the oil used to lubricate the timing gears , down to the crankcase. You're good turbo, real good. Thanks.

This is possible with gear driven pumps. Is your ride an isuzu (or toyota B), which other diesels are using gear driven pumps.

[colt45]

This is possible with gear driven pumps. Is your ride an isuzu (or toyota B), which other diesels are using gear driven pumps.

Isuzu. I surmise fuel seeps out of the injector shaft, and the o-ring which seals the injection pump from the timing gear case is also shot. I doubt if its the injectors because it would have resulted in an engine-performance problem. Thanks sir Jayo.

[adventure]

blow-by po siguro yan kasi po yung samin ganyan din eh pag binuksan mo yung radiator ang lakas ng tapon ng tubig and my white smoke na mabahong lumalabas tapos pinalitan ng mga valve guide and pistons