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Forged Engine Using Oil

sickr33

By sickr33,
in Engines & Forced Induction

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Blitz Grand Master

Blitz

Posted
Posted

i jacked the car up nice and high to day and i have noticed i have an oil leak

it appears to be the return oil line for the front turbo.

general area around is oily but not dripping!

i am pleased to have found this as i have a new set of gt2860-5 along with Tomei manifolds and dumps to go in the next 2 weeks

i hope this is the only oil consumption

That may be part of it, but I wouldn't go getting excited and fitting new turbos and manifolds until you have the root cause correctly diagnosed.

Don't half do it, have the leak down test done by a competent workshop.

SECURITY Grand Master

SECURITY

Posted
Posted

i dont think a leaking oil return would result in your breather collecting that much oil. i know you've got a case of wishful thinking but if you make the hard decisions early you can save yourself more damage being done to the motor.

dont learn the hard way.

horrace Rising Star

horrace

Posted
Posted

Just so you know, nissan spec for oil consumption is 1L every 2000kms. Anything higher then that is deemed unacceptable. However you blowing smoke, so i would be gettin a leak down test asap.

1L in 2000 km's, you serious? Maybe in a 300,000+ km engine it would be acceptable

Duncan Grand Master

Duncan

Posted
Posted

Just so you know, nissan spec for oil consumption is 1L every 2000kms. Anything higher then that is deemed unacceptable.

No, it's even worse that that!

Nissan say acceptable is 1l per 1,000klm. We fought with them for year about our 350z which did exactly that, they never fixed it.

Rolls Grand Master

Rolls

Posted
Posted

1L in 2000 km's, you serious? Maybe in a 300,000+ km engine it would be acceptable

The old LS1s all consumed almost 1L/1000kms which is why half them had to be warrantied, there is still quite a few going around that couldn't get warranty using almost that much oil though.

gtr fan Experienced

gtr fan

Posted
Posted

No, it's even worse that that!

Nissan say acceptable is 1l per 1,000klm. We fought with them for year about our 350z which did exactly that, they never fixed it.

A new car used 1L/1000KM???

Did they eventually sort it out after 1 year?

Stories like that make me never want to buy a brand new car. We did about 3 years ago and its been really good, but it was always in the back of my mind if something major went wrong car manufactures can make life very difficult.

P.S. Sorry to go off topic.

Regarding the bloke who started the thread, are you getting the leakdown test done. Surely a workshop could do this at short notice for you or even the engine builder could do it for you??

STATUS Grand Master

STATUS

Posted
Posted

Just so you know, nissan spec for oil consumption is 1L every 2000kms. Anything higher then that is deemed unacceptable. However you blowing smoke, so i would be gettin a leak down test asap.

thats a warranty cop out (all manufacturers have the same clause), i worked for nissan and depending on the attitude of the customer and its previous use we made report, then a decision was made to replace or build engine. We actually replaced a few blown nizpro engines under warranty for the special edition 200sx-R's they built 10--odd years back.

sickr33 Rising Star

sickr33

Posted
  • Author
Posted

i took the car back to south side engine center today

they did comp test (4psi of variance across all 6 cylinders)

leak-down test (6-7% leak down across all 6 cylinders)

put a camera down the spark plug holes to inspect the bores and condition of the pistons.

and all looked sweet i had a look myself!!.

conclusion i have been told to put my new turbos on

put new O2 senors in

change oil and get tuned car tuned asap as it is running too rich witch may be washing oil from the bores

so as it stands i'm very happy with the result.

Don Dada Mentor

Don Dada

Posted
Posted

Just so you know, nissan spec for oil consumption is 1L every 2000kms. Anything higher then that is deemed unacceptable. However you blowing smoke, so i would be gettin a leak down test asap.

Is this info in the owners manual???

the leak down is pretty bad?

My 100,000 old RB25DET engine that ran 200rwkw for about 2 years had 2% leak down across all 6.

I guess different testers would give different values but i would think what is more important like compression test, is the variance between individual cyls ?

marksuxass Collaborator

marksuxass

Posted
Posted

i took the car back to south side engine center today

they did comp test (4psi of variance across all 6 cylinders)

leak-down test (6-7% leak down across all 6 cylinders)

put a camera down the spark plug holes to inspect the bores and condition of the pistons.

and all looked sweet i had a look myself!!.

conclusion i have been told to put my new turbos on

put new O2 senors in

change oil and get tuned car tuned asap as it is running too rich witch may be washing oil from the bores

so as it stands i'm very happy with the result.

Hmm. We have had a petrol navara in at work which had a problem with using excessive oil. Liased with nissan's techline and told us to do a ECU relearn with a patch file they sent us. Apparently one of the banks reads a little leaner then the other, and this can cause excessive oil consumption. Did the relearn and its seemed to fix the problem.

Is this info in the owners manual???

I guess different testers would give different values but i would think what is more important like compression test, is the variance between individual cyls ?

The info is not in the owners manual. Basically had to ask one of the nissan engineerers for the specs.

DVS JEZ Grand Master

DVS JEZ

Posted
Posted

Hmm. We have had a petrol navara in at work which had a problem with using excessive oil. Liased with nissan's techline and told us to do a ECU relearn with a patch file they sent us. Apparently one of the banks reads a little leaner then the other, and this can cause excessive oil consumption. Did the relearn and its seemed to fix the problem.

did they explain why a lean mixture will cause oil consumption?

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