Calling all 6mt Rev-Up Engine Owners..
07-30-2008, 07:15 PM
#42
Z + Rear Seat
iTrader: (3)
Join Date: Jun 2005
Location: St.Pete,FL
Posts: 1,642
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by bimmertech
it is very upsetting. i do not think the rings are the problem. i personally feel they did not build the engine to turn 7k rpm on a regular basis--specifically the rod ratio. almost all VQ's burn a bit of oil, but the increased rpm really magnified the problem. i also suspect this due to the 07's not having any issues at all and having a taller deck with longer rods. i'm not engineer, but it makes sense to me. 
The VQ37HR in the G has a taller deck and a longer stroke. I wonder if the stroke to rod ratio in the VQ37HR is the same as the VQ35HR?
07-31-2008, 07:02 AM
#47
Originally Posted by dmroberson
Oh, throwing this out there... met a guy the other night with a new G37 Coupe, and he's losing a little more than 1 quart every 1000 miles already... I think he said he's got about 5K on the clock...
When I was breaking mine in, it was consuming about 1qt per 4k mines, now at 24k miles on the clock, it's inceased to 1qt per 3k miles. Slowly getting worse...
I'm thinking it's gotta be a "wear" item like rings, valve seal guides, seats, etc...
Last edited by gothchick; 07-31-2008 at 07:05 AM.
07-31-2008, 08:21 AM
#49
Registered User
Thread Starter
Join Date: Apr 2006
Location: NYC
Posts: 61
Likes: 0
Received 0 Likes
on
0 Posts
I wonder if it's too early to determine whether or not the VQ35HR engines are going to have the oil consumption issue. This engine comes in the 2007-2008 350z, and the 2007 G35 Sedan. The new G37 is also questionable.
Seems like Nissan/Infiniti are infamous with oil consumption issues.
I really wanted a G35 since day one. I can't believe the engine was awarded top 10 engines for all those years. They must have tested the automatic only.
Thanks for everyones input. Keep the suggestions and feedback coming.
Seems like Nissan/Infiniti are infamous with oil consumption issues.
I really wanted a G35 since day one. I can't believe the engine was awarded top 10 engines for all those years. They must have tested the automatic only.
Thanks for everyones input. Keep the suggestions and feedback coming.
07-31-2008, 05:28 PM
#50
Registered User
iTrader: (10)
Join Date: Aug 2007
Location: kansas city
Posts: 607
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by __jb
Interesting.
The VQ37HR in the G has a taller deck and a longer stroke. I wonder if the stroke to rod ratio in the VQ37HR is the same as the VQ35HR?
The VQ37HR in the G has a taller deck and a longer stroke. I wonder if the stroke to rod ratio in the VQ37HR is the same as the VQ35HR?
07-31-2008, 06:57 PM
#51
Haven't noticed anyone on the '06 Oil consumpt'n page here...
I had a '06 MT ZR with 3 different engines. Had enough - did a buyback and got a '08 MT ZR 900 below invoice. I would'nt waste my time on a '06 MT if I had to do it all over again. There's fantastic deals on '07's and others if you do your homework. Make sure you read this thread:
https://my350z.com/forum/engine-driv...iscussion.html
https://my350z.com/forum/engine-driv...iscussion.html
07-31-2008, 07:03 PM
#52
Originally Posted by Shift__Z
nissans are known for oil consumption just ask my 04 spec v 
But then again, I've had both on autocross courses before 1000 miles (the SpecV had 600 miles, and the Z had less than 300 miles -- but it was wet)
08-01-2008, 12:54 PM
#53
Z + Rear Seat
iTrader: (3)
Join Date: Jun 2005
Location: St.Pete,FL
Posts: 1,642
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by bimmertech
i thought the deck height in the 35hr/37hr/40 were all the same
Nissan could move the wrist pin in the piston and keep the rod length the same. I was just thinking they'd try to keep the pistons the same.
08-01-2008, 07:29 PM
#54
Registered User
iTrader: (10)
Join Date: Aug 2007
Location: kansas city
Posts: 607
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by __jb
I would assume the deck height to be different on the VQ35HR and the VQ37HR because of the stroke difference.
Nissan could move the wrist pin in the piston and keep the rod length the same. I was just thinking they'd try to keep the pistons the same.
Nissan could move the wrist pin in the piston and keep the rod length the same. I was just thinking they'd try to keep the pistons the same.
they could move the wrist pin, but that might permit more oil consumption. i would imagine that they used the 40 crank/rods, but used a diff piston all together.
i am prolly wrong though and have 0 technical information to back this up.
08-02-2008, 05:00 AM
#55
Registered User
iTrader: (1)
Join Date: Jun 2008
Location: Chicago
Posts: 188
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by PDX_Racer
Strange, my 2002 never had oil consumption problems.
But then again, I've had both on autocross courses before 1000 miles (the SpecV had 600 miles, and the Z had less than 300 miles -- but it was wet)
But then again, I've had both on autocross courses before 1000 miles (the SpecV had 600 miles, and the Z had less than 300 miles -- but it was wet)
. The 04s are the ones that had cat and oil consumption issues
08-02-2008, 09:29 PM
#57
Registered User
iTrader: (1)
Join Date: Jun 2008
Location: Chicago
Posts: 188
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by PDX_Racer
Don't forget about the butterfly screws.
OTOH, there are still times that I miss my old SpecV.
OTOH, there are still times that I miss my old SpecV.
Ya you know you own a spec v when your afraid of cats and butterflies
08-04-2008, 12:30 PM
#58
Registered User
iTrader: (12)
Join Date: Jul 2007
Location: Massachusetts
Posts: 260
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Shift__Z
why?
08-14-2008, 05:30 PM
#59
Registered User
Thread Starter
Join Date: Apr 2006
Location: NYC
Posts: 61
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by MikeyG
Because it was a hastle to have the engine replaced. Now I am real hesitant about doing any mods to the engine in case it happens again as it has to quite a few people and have a hard time getting it replaced under warranty. Would rather not have a model year with this problem.
Yeah, I would be hesitant modifying a rev-up G35/350z. I would most likely keep it stock for a while until I can get a read of the oil consumption pattern.