LWFlywheel=Crank walk?
#1
![Default](https://my350z.com/forum/images/icons/icon1.gif)
Hi,
I was wondering how many people with LWFlywheels have had there motors blow because of crank walk? Tonight, at a meet I was talking to a guy who works for a nissan dealership. He says LW flywheels cause crank walk. I had no clue what that was so he explained "it's when your crank becomes unbalanced and starts moving side to side"
I was wondering if this is true with our motors and has anyone experienced it.
-Josh
I was wondering how many people with LWFlywheels have had there motors blow because of crank walk? Tonight, at a meet I was talking to a guy who works for a nissan dealership. He says LW flywheels cause crank walk. I had no clue what that was so he explained "it's when your crank becomes unbalanced and starts moving side to side"
I was wondering if this is true with our motors and has anyone experienced it.
-Josh
#2
Registered User
iTrader: (15)
Join Date: Nov 2003
Location: Clarksville, Tennessee
Posts: 6,612
Likes: 0
Received 1 Like
on
1 Post
![Default](https://my350z.com/forum/images/icons/icon1.gif)
only cars that have actually ever had a documented case of thise "crankwalk" were the 2G DSM cars, and that was due to a weak or poorly built engine. IMO, the VQ is a pretty strong motor, so i doubt that such a thing can occur on this engine at all. plus if this had happened, i am sure it woudl have been posted here long ago
Last edited by Z04; 02-10-2007 at 06:07 AM.
#4
Registered User
iTrader: (8)
![Default](https://my350z.com/forum/images/icons/icon1.gif)
How much does the LW weigh ? I wasnt familiar with the term but understand the concept ----Its, I would think a question of balance. Or if the FW is too lite, then the imbalance of the clutch assy would zero out one of the FWs jobs which is to keep the balanced assy as a whole in chk (Crank,rods,etc)
#5
Registered User
iTrader: (14)
![Default](https://my350z.com/forum/images/icons/icon1.gif)
I just don't see it as a problem for our cars. It could be at a certain weight that "walk" is experienced. However, I doubt that Nissan (Nismo) would release a light weight flywheel (even though it is heavier then most at 21lbs) which could harm the engine.
There is the possibility that something as light as an 8lb Tilton could have adverse effects but I think that "walk" was something more associated with earlier engines that required the flywheel to act as an inertia damper of sorts.
There is the possibility that something as light as an 8lb Tilton could have adverse effects but I think that "walk" was something more associated with earlier engines that required the flywheel to act as an inertia damper of sorts.
#7
![Default](https://my350z.com/forum/images/icons/icon1.gif)
Originally Posted by Z04
IMO, the VQ is a pretty strong motor, so i doubt that such a thing can occur on this engine at all. plus if this had happened, i am sure it woudl have been posted here long ago
Thanks
Trending Topics
#9
Banned
iTrader: (28)
Join Date: Dec 2005
Location: Spotswood NJ
Posts: 5,510
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
Crank walk is nasty...
We had a Tiburon with a Supercharger that had crank walk, where the crank actually was able to be pulled and pushed into the back of the motor about 1/4" each way...The Kid came in for a clutch job, and wound up doing a motor and tranny...
His crank was actually pushing his clutch and flywheel so far back that it started to grind away at his actual transmission case..
We had a Tiburon with a Supercharger that had crank walk, where the crank actually was able to be pulled and pushed into the back of the motor about 1/4" each way...The Kid came in for a clutch job, and wound up doing a motor and tranny...
![](https://my350z.com/forum/images/smilies/icon14.gif)
#10
Registered User
iTrader: (5)
Join Date: Dec 2006
Location: Elmwood Park, NJ
Posts: 300
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
Originally Posted by Z04
only cars that have actually ever had a documented case of thise "crankwalk" were the 2G DSM cars, and that was due to a weak or poorly built engine. IMO, the VQ is a pretty strong motor, so i doubt that such a thing can occur on this engine at all. plus if this had happened, i am sure it woudl have been posted here long ago
![](https://my350z.com/forum/images/smilies/icon14.gif)
#11
Registered User
iTrader: (154)
Join Date: Jun 2003
Location: Hills of Anaheim
Posts: 10,735
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
Originally Posted by supra crazy
Hi,
I was wondering how many people with LWFlywheels have had there motors blow because of crank walk? Tonight, at a meet I was talking to a guy who works for a nissan dealership. He says LW flywheels cause crank walk. I had no clue what that was so he explained "it's when your crank becomes unbalanced and starts moving side to side"
I was wondering if this is true with our motors and has anyone experienced it.
-Josh
I was wondering how many people with LWFlywheels have had there motors blow because of crank walk? Tonight, at a meet I was talking to a guy who works for a nissan dealership. He says LW flywheels cause crank walk. I had no clue what that was so he explained "it's when your crank becomes unbalanced and starts moving side to side"
I was wondering if this is true with our motors and has anyone experienced it.
-Josh
#12
Former Sponsor
iTrader: (564)
Join Date: Feb 2003
Location: Long Island, New York
Posts: 19,266
Likes: 0
Received 5 Likes
on
5 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
Originally Posted by BiGGD198
its not due to a weak motor....its just it was very porly built due to having 7 bolts instead of 6 bolts.....stupid idea i must say because thats very off balance. what where they thinking???? ![](https://my350z.com/forum/images/smilies/icon14.gif)
![](https://my350z.com/forum/images/smilies/icon14.gif)
Do you realize what you're even saying? You happen to be completely wrong
Evo's have 7 bolts cranks too - in fact, every Evo dating back from the Evo III had a 7 bolt crank. It was a inconsistency in assembly from the US factories, not an issue with the design of the motor (the crank doesn't care, nor know, how many bolts it has, and the number of bolts has no bearing on the ability of the crank to be properly balanced, etc).
Last edited by Z1 Performance; 02-16-2007 at 06:02 AM.
Thread
Thread Starter
Forum
Replies
Last Post
lolwatbro
Maintenance & Repair
9
10-09-2021 04:58 AM
Colombo
Forced Induction
35
11-09-2020 10:27 AM