Excess oil usage

Hi John,
Leaking rear main usually drips into the bell housing which in turn drips onto floor I think, no drops on the floor in this case. Still, something to keep in mind, thanks.

Avagoodn
Pezza

Hmm, interesting Axle,
Ok, I'm not completely mechanicaly illiterate, ( though not real crash hot with diesels) I understand the worn pump or injector bit ending up with excessive diesel in the oil, but how would that diluted oil cause excessive oil burn ?
( thinking whilst typing) Diluted oil being much thinner therefore getting forced up into combustion chamber and being burnt or spat out the exhaust in it's raw form, hence the spots ? am I on the right track ?

Pezza

It may not be the problem you have, but sure as hell seen it before!!.

Mate I wasn't trying to be snidey or sarcastic or anything, I really didn't know!
Going by your reply I must have figured it out once I started thinking about it.
I told him to get a compression check done, as he lives in the bush he won't be able to get it done till next week, and what your saying also makes sense, so will advise him to get the injectors checked seeing as they will be out whilst doing the compression thing.
Thanks for the advise and for taking the time, much appreciated.

Avagoodn
Pezza

Too much fuel can wash the cylinder walls clean of the oil that actually helps the rings to seal, which can cause you to burn oil, but that would be evidenced by smoke, not necessarily enough to see in your mirrors. Try holding the engine at a steady 2000 rpm & check for smoke then.

Thanks for that explanation Shaker, now it makes sense. Will get him to do that test and let you know what happens.

Avagoodn
Pezza

HI Guys, Just a thought and facts Compression tests on diesels are carried out thru the glow plug removal,in most cases.Futher anybody or I should say any decent mechanic would not rebuild a diesel motor without reconditioning or renewing the pump and injectors on rebuild,if this was not done it explains why the oil burn,hows that?

Regards BILLS. (again)

Hi Bill,
Didn't realise the compression test was done that way ( as I said I'm not too crash hot with diesels, so I learnt another thing) .
The pump and injectors were both done aswell as they would not warranty the engine rebuild without doing them aswell.
I don't think the timing/ tuning of the pump was done correctly after re-assembly, hence the extra fuel usage which may be causing the cylinder washing theory.
Am getting him to come here to Brisbane asap to get it into a tuning specialist with dyno to get the whole thing tuned properly, then go from there.
Thanks for your input.

Avagoodn
Pezza

Hi Reiner,
Good point and interesting, will check with him but am assuming he is still using valvoline, as this is the stuff he's been using since day dot.

Avagoodn
Pezza

Hi Brid,
Don't think he is nursing it, he's been told by the reconditioners and myself to just drive it 'normal'. As for the oil, normal mineral valvoline diesel, but will check.
He does idle it for 3-4 minutes before driving slowly, taking it very easy, for the first 5 minutes or so, after which he drives for 45 minutes or more into town, if he does only go down to the post office ( a k or so down the road ) he let's it run while he is inside I think.
Will check with him how many times a week he does the post office thing, as this could be a problem by the sounds of it. Discounted the temperature thing as he lives in central western QLD.
Thanks for your help.

Avagoodn
Pezza

He should not be idling the engine for that long before driving!!

Start the engine as soon as the oil pressure is up then Drive it and drive it so it gets under load, taking it easy for 5-10 minutes will not do it any good and if he has been doing constant speed driving with it from new that is also not good.

I would say the rings have not bedded in.

What he should of done is

As soon as he got it he should of done this

1.Don’t let the thing idle before driving, as soon as the oil pressure is up drive it

2. Load the rigs up as soon as you get the thing back from the builder by accelerating in top gear from 40 to 80 7vreal times

3. Just drive it normally I.E take it into the power band when accelerating don’t put along at under 2000RPM for 10-15 minutes but at the same time don’t thrush it.

4. No constant speed/ RPM driving for the fist 1500k’s if possible.

Thanks Exploder, will let him know.
Hopefully the oil usage problem is only minor or something to do with excess fuel that we can fix with a good tune up and pump check.

Avagoodn
Pezza

Thanks 120 cruiser, didn't realize that they would require this but started him doing it straight away to know for ourselves.
It was bored with new pistons BTW.

Avagoodn
Pezza

Hi Sarg,
Never thought about that, I don't think the turbo was done, as the motor was only rebuilt due to him splitting a heater pipe and losing all the water and seizing it, yes he now runs a low water alarm! Will get him to check in the intake pipe.

Thanks
Pezza