Glazed cylinder walls, increased emissions, burned out catalytic converters, reduced power, the list goes on. (that's assuming the problem lies in the piston ring sealing/cylinder wall finish)

It's not acceptable at all.

However, now that a TSB has been issued by Nissan, there's no harm in owners waiting until the 10K or 20K mile point to ensure that the oil consumption issue hasn't taken care of itself. Most owners will have put 20K miles on their cars well within the 4 year/50K mile powertrain warranty period. IMHO it'd be foolish to pursue a short/long block replacement too early in the engine's lifecycle if the problem would've taken care of itself in time. Besides, there's some anecdotal evidence from folks on the this forum that early oil consumption in the VQ37VHR settles down after 10K miles or so.

I think it's prudent to wait. That's what I plan to do. Now that the TSB's out, there's no reason not to.

oil consumption bulletin
 

......sorry the pdf file doesnt work if u dont have the right file

Please PM a copy to AK370Z (i.e. the Admin), he has a TSB section on this website.

It doesn't like your PDF. Is this just a ordinary PDF?

Edit: It appears as though there is some kind of file security (FileOpen) on this file.

it works when i click on it and download it

Yep, there is security as I caught it at the firewall...when it hit it. ;)

Yes, but it calls home and collects data as to where it's being opened.

nice sorry oh well i tried

:tup: Rep Point = Trying

Owner of the PDF: Just take screenshots using Printscreen button, paste in Paint, save as PNG, upload as attachment.

So who has the TSB? Can someone please send me a copy of the TSB. Thanks.

will try that tomorrow thnx

...and hopefully my dealer will have swapped 50 long blocks before they ever attempt mine.

From what I understand, dealers are now instructed to do Short Blocks. I never asked what it would take for the dealers to do long blocks.

Far greater chance of an assembly screw up or contamination with a short block swap. Be afraid. The Nissan techs are not engine builders and may not follow all the industry assembly procedures. If your engine fails demand a long block.

agreed, you're the consumer, you've got a right to demand a new motor in full if your car is under warranty... I fully agree. force the issue.

I finally got a call from the dealer saying that they have the parts for the short block change on my engine. I only have 10,000 miles I can't believe it. I hope they do a good job. There is something that does not make sense to me a new $40,000 dollar car with this issue.

Did you ask for a long block? Or Nissan only allow short blocks nowadays?

i take great offense to this statement...i am a nissan tech, tomorrow i will be performing the oil consumption bulletin on an o6 350z... i follow all guidelines and torque specs that nissan has provided in the service manual... as for nissan and the short block instead of a long block.. the bulletin specifically states if the vehicle fails oil consumption test it gets a short block and full gasket set, and honestly i think the only way to get a long block would be to complain to nissan directly, the dealer really doesn't have any say, because there is a specific billetin for the problem...
WarmAndSCSI sorry for the delay with getting the bulletin pdf uploaded.. was swamped today with two pathy timing chain tensioners... lol to add to another long day 350z short block lol i love my job...

well didn't get the vq done today but letting everyone know that not only does the gasket kit contain every freaking o ring and gasket on the engine... but also contains new valve seals... lol sooo i guess nissan never actually figured out the exact problem and or its a combination of the two (piston rings and valve seals) that make the vq's eat oil like its their job...

New valve seals, interesting :icon08:

Are you/have you worked on the 370z engine? What do you think the cause of the oil consumption? Is the OC issue gone on the engine that you personally worked on?

Still wondering why there are no details on why these engines drink oil.

It wasn't meant to be offensive, just a statement. I'm sure you are a very good tech but for engine assembly I would would prefer an engine builder, i.e. someone that does it day in and day out, not once a month or more.

Wow! Just wow.

Every engine rebuild gasket set contains new valve stem seals. It's not usually those which leak on new engines, it's the brass valve guides with too loose of clearances around the valve stems.

Not sure what's going on with the VHR, but if it's the valve guides, Nissan should be replacing cylinder heads and short blocks (due to oil consumption build up). I'm assuming this is a problem with the cylinder wall finish or piston ring wear/lapping if Nissan is replacing short blocks only.

What ever happened to the PDF doc with the Nissan logo?

it is locked and i cant get it....

:) :) :)

this pdf?

http://www.the370z.com/370z-technica...level-low.html

^Nice. It's incredible just how generous Nissan is with 'acceptable' oil consumption. I've never seen my dipstick reading drop anywhere close to 18mm over 3k miles on any car!

I have.

finally, nobody know exactly what is the root of the problem???

Thanks AK! I'm definitely going to the dealer with this in the near future.

well as of nissan wont tell us nor do they give reasons for the oil consumtion, but. i have asked some older 30 year master techs at nissan training about it, and it supposivly has always been a problem with nissan engines with the rings not seating correctly... with either the manufacturer of the rings or the cylinder wall surface. no body really knows except for the higher ups at nissan who wont disclose any info

Cough, cough.... forgive me, but that is pure "bovine scatology". Piston rings, especially very hard ones that are in this engine, take quite a long time to seat. Break-in period is quite long. For heavens sake people.... RELAX!! How long must this insanity continue before people will just give these engines 10K miles to properly break-in?

My engine..... 9500 miles..... oil consumption..... NIL!! Yes, it did use quite a bit of oil during the first 5 or 6 thousand miles. But now..... NOTHING. A B S O L U T E L Y N O R M A L !



(WOW)

Your engine is still young dude. Mine didn't start drinking too much oil until about 15k miles. I am at 17,700 and going through 2 quarts every 3k miles. Just because your engine is acting normal now doesn't mean there is no problem with any other 370Z engine on the face of the earth.

6mt is right.....in most cases!

I will however side Import111 in cases like his and mine. My first engine did not use oil until around 6k.

There are only two possibilities for hight oil consumption

may quality issues including normal human overload because of cost reduction on the powertrain production (price orientated hight power product not hand crafted) or coustomer rpm abuse at cold oil
a) piston and ring surface (honing in production)
b) intake valve

are the heads replaceable in the engine bay or does the engine has to be removed because of the abnormal "low" noise that was mentioned , this sounds more like a head problem. Abnormal piston noise is louder :-)

I have no oil consumtion @ 10k km with the first oil, what is normal for proper brake in and of course no abuse and all todays engines behave like this if there was no quality issue in production.. oil type of course didnt matter because of API (for the oil popes who belive in healing through blessed fluids..best indulgence discussions)

Maybe this has something to do with it.

NISSAN | Ultra-low Friction Diamond-like Carbon (DLC)

H.