Oil Consumption In Forged Engine

[DVS JEZ]

Could have a stuck oil control ring. Is there 1 spark plug that looks different to the rest? Oil build up Or deposits etc on the plug

[TiTAN]

if thats directed at me, all the plugs look fairly similar and none have much carbon etc on them.

[DVS JEZ]

Yeh was directed at u.

How much oil is it using exactly and what oi. Are u using?

[TiTAN]

i was using motul 4100 10-40 and have changed over to some thicker castrol 10-60 before posting in this thread for the first time, between then and now it has used ~3L of oil.

[Rolls]

in how many kms ?

[TiTAN]

2000-2500km

[Rolls]

something is definitely broken if it has used 3L

most likely rings or something like that was installed incorrectly.

other possibility is turbo is chewing all the oil, you'd notice it smoking though.

[TiTAN]

is there any way to check the oil seals in the turbo without pulling it appart?

i have had issues in the past where the oil drain had a 5/8" T piece in it (which has since been replaced with a 3/4") to allow the VCT oil drain to enter the sump. however the oil wouldnt drain away fast enough which caused the oil to backup into the turbo and force its way past the seals.

[DVS JEZ]

if you pull the dump pipe and intake off you should be able to tell if its the turbo or not,

i rebuilt a mates diesel hilux 3 months ago because it was using 1 litre of oil in 400k's. didnt blow excessive blue smoke but had a tinge to it.

when i was pulling it down i found cyl 1 oil control ring was seized shut, other than that the motor was fine.

who assembled your motor?

[GTRPowa]

Well one of my -5's leaked oil through the exhaust seals during it's installation, I could see it coming out of the dump pipe before I attached my front pipe up. Called GCG and they said it's normal and it'd seal up over time. I'm very vague on the actual numbers but when you go over a certain amount of oil pressure (30something psi?) you need restrictors. They wouldn't help you in your case if your drains aren't big enough, but I do remember also reading about oil consumptions and one of the first things they say is check the drains for fast and proper drainage. I'd assume blocking PCV system would give you the same effect. Too much oil/crank pressure.

[Rolls]

That is a good point, an incorrectly set up catch can system that pressurises the crank case will cause oil consumption issues.

[TiTAN]

if you pull the dump pipe and intake off you should be able to tell if its the turbo or not,

i rebuilt a mates diesel hilux 3 months ago because it was using 1 litre of oil in 400k's. didnt blow excessive blue smoke but had a tinge to it.

when i was pulling it down i found cyl 1 oil control ring was seized shut, other than that the motor was fine.

who assembled your motor?

proengines did the final assembly and that was over a year ago, these problems have only started in the last couple of months.

That is a good point, an incorrectly set up catch can system that pressurises the crank case will cause oil consumption issues.

the catch can vents to atmo and the 1 way PCV valve is connected and functioning as it would from the factory.

Well one of my -5's leaked oil through the exhaust seals during it's installation, I could see it coming out of the dump pipe before I attached my front pipe up. Called GCG and they said it's normal and it'd seal up over time. I'm very vague on the actual numbers but when you go over a certain amount of oil pressure (30something psi?) you need restrictors. They wouldn't help you in your case if your drains aren't big enough, but I do remember also reading about oil consumptions and one of the first things they say is check the drains for fast and proper drainage. I'd assume blocking PCV system would give you the same effect. Too much oil/crank pressure.

The turbo (3582R) has a built in restrictor, there is however also an aditional restrictor before the turbo as that was thought to be causing the oil to push past the seals (this issue has been fixed the whole drain from the turbo to block is 3/4")

[TiTAN]

do a fairly agressive leak down test on it (@ operating temp), it will tell you whats going on.

Here's one we did not long ago.

CYL COMP LEAK DOWN

1 155 10-16% @100-110psi

2 155 10-16% @100-110psi

3 155 10-16% @100-110psi

4 155 10-16% @100-110psi

5 155 10-16% @100-110psi

6 155 10-16% @100-110psi

http://www.carcraft....ster/index.html

finally got the leakdown test done.

Compression 150-160 on all cyls

Leak down ~25% on all cyls @ ~100psi

from the earlier test that suggested almost all the lost pressure was going past the rings and that leak down figure i take it the rings are gone?

[DVS JEZ]

doesnt sound good man,

how is the tune on the engine? any reason you can think of as to why it has worn out this quickly

[TiTAN]

tunes ok and very conservative at load.

if i had to put it down to anything i would probably put it down to machining tolerances possibly being a bit on the loose side (as its always been noisy) and that during initial tuning and run in it had to be run fairly rich to idle smoothly as the injectors were partially blocked.

[Simon-S14]

to be honest there doesnt really look like theres anything wrong going by the leakdown and comp tests. sure the leakdown is a little on the higher side but by no means totally f**ked..

[TiTAN]

it still physically runs ok but you have to put ~500ml or more of oil in it every 2 weeks.

[Simon-S14]

is it filling a catch can at all?

[TiTAN]

barely a drop in the catch can.

[Rolls]

Have to wait until the turbo is replaced and see.