Had to pull head... - ZX6R Forum
 5Likes
  • 1 Post By commiehunter
  • 3 Post By wildfire77
  • 1 Post By riverszzr
 
LinkBack Thread Tools Display Modes
post #1 of 9 Old 05-19-2017, 07:34 AM Thread Starter
Team Green
 
wildfire77's Avatar
 
Join Date: Sep 2015
Location: SE Wisconsin
Posts: 186

I Ride: Track Preped 07 ZX6R
Had to pull head...

The engine is replacing a blown engine, so its been used and I don't know its maintenance history. Bolts on everything seemed over torqued (cam caps, and head bolts). I'm assuming the head bolts haven't been touched since the factory.

So anyway, in putting the head on, and tightening the bolts; the threads in the block sheered on one of them... (yes i'm following the torque specs per the manual 11ft/lbs then 39ft/lbs.) Has anyone ever heard of this on a current generation (2007-present) zx6r motor?

Keep it on 2 wheels!
BIKES:
2002 Ninja EX250 sold (new 2002-2006)
2004 GSXR 750 sold (2008-2010)
2008 GSXR 1000 sold (new in 2010-2014)
2012 Aprilia Tuono RSV4 APRC sold (early 2014 - Fall 2015)
2007 Track Prepped Ninja ZX6R (Fall 2015 - Current)
wildfire77 is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 05-19-2017, 08:39 AM
World Superbike Racer
 
commiehunter's Avatar
 
Join Date: Apr 2015
Location: Portland
Posts: 1,685

I Ride: ZX6R 636
Paging @riverszzr
Scorpi0 likes this.

Never ride faster than you can stop
commiehunter is offline  
post #3 of 9 Old 05-19-2017, 10:35 AM
Post Master General
 
RJ2112's Avatar
 
Join Date: Apr 2012
Location: Bowling Green, VA
Posts: 7,730

I Ride: '09 ZX6R
I'd have to think that you are not the first person to put a head on that motor after it left the factory.\

"Basic stuff fellas. Use your head for something other than to break your next fall."

"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "
RJ2112 is online now  
Sponsored Links
Advertisement
 
post #4 of 9 Old 05-19-2017, 04:21 PM
ZX6r.com Supporting Member
Supporting Member
 
Indy's Avatar
 
Join Date: Jul 2015
Location: Indianapolis, In
Posts: 1,266
Garage
Yes,, had issues with my cam retainer..

My NEW Torque wrench sucks. Went back my old one I was afraid was out of tolerance.

SO my guess is your torque wrench is also having issues or your bolt was either over torqued and weakened or it it was corroded in place. The later seems improbable.
Depending on what you find after tear down. Consider replacing all those bolts, assuming they are all weakened thus stretched.
I regret not doing that on my Honda, ended up with a weeping leak lower jugs after the rebuild.
Indy is offline  
post #5 of 9 Old 05-19-2017, 07:08 PM Thread Starter
Team Green
 
wildfire77's Avatar
 
Join Date: Sep 2015
Location: SE Wisconsin
Posts: 186

I Ride: Track Preped 07 ZX6R
yea. pretty corroded which didn't help, but figured out what i did though...

so it was a long day with little sleep. was torquing to ft/lbs... the 39 in my post is the n/m measurement... the ft/lbs conversion is 29. very similar numbers. way over torqued. lesson learned...

the good news. the engine is coming together again after lathing a custom head stud. pictures to come...
RJ2112, PainfullySlo and Indy like this.

Keep it on 2 wheels!
BIKES:
2002 Ninja EX250 sold (new 2002-2006)
2004 GSXR 750 sold (2008-2010)
2008 GSXR 1000 sold (new in 2010-2014)
2012 Aprilia Tuono RSV4 APRC sold (early 2014 - Fall 2015)
2007 Track Prepped Ninja ZX6R (Fall 2015 - Current)
wildfire77 is offline  
post #6 of 9 Old 05-20-2017, 04:28 AM
ZX6r.com Supporting Member
Supporting Member
 
Indy's Avatar
 
Join Date: Jul 2015
Location: Indianapolis, In
Posts: 1,266
Garage
That's good..

Once I pulled the wrong wrench, wasn't inch pounds, was foot pounds.
Indy is offline  
post #7 of 9 Old 05-24-2017, 08:55 AM
MotoGP Champion
 
riverszzr's Avatar
 
Join Date: Sep 2008
Location: 4 months of frozen hell
Posts: 4,720

I Ride: 86,000+ mile '07 ZZR600
I had an engine (used one from ebay) come to me that was suposedly unmolested and out of a great low mileage running bike.

What I found was every case bolt on the thing had been stripped (all the main bolts had zero threads- the smaller peremiter bolts would spin and spin and spin and spin only slightly tight)

At any rate..... the engine had been taken apart, 5 new transmission gears put in, and all three shift forks--but then they filled all the holes with silicone and pushed the bolts in and let it all cure and promptly sold said engine.....

The plus side for me......... I was taking it apart anyways and didn't "need" the cases.......and the $800 of brand new transmission gears and shift forks likely paid for the engine

But man what a pain in the ass to get those bolts out and the cases apart

I guess my point is.....People (not all, but too many) are liars and cheats and will say anything do anything to make a sale
PainfullySlo likes this.

Stupid people say stupid things on the internet, so be wary of who those people are. If you solicit advice on the internet, just keep in mind 99% of what you'll receive is not based on fact or science-and likely atleast 95% of it is based on bullshit and bravado regurgitated from some other schlub who also did not experience any of what they claim and are also full of shit. If you don't like my bluntness- too bad. I am not here to please you, so move along, your approval is not desired nor is it needed. So before opening your pie hole and adding more stupidity, perhaps sit back, listen, absorb and learn something. You know that saying, it is better to remain silent and thought a fool than to open your mouth and remove all doubt!
riverszzr is offline  
post #8 of 9 Old 05-24-2017, 08:59 AM
MotoGP Champion
 
riverszzr's Avatar
 
Join Date: Sep 2008
Location: 4 months of frozen hell
Posts: 4,720

I Ride: 86,000+ mile '07 ZZR600
fyi...cam cap bolts especially always feel like they are tighter when you first remove them, even when they have been properly torqued upon install

There have been times I have found them to "feel" so tight I actually pulled out the torqued wrench just to see how tight the break lose point is..... often I find over 120 inch lbs on spec trq of 94-104 inch lbs....

Stupid people say stupid things on the internet, so be wary of who those people are. If you solicit advice on the internet, just keep in mind 99% of what you'll receive is not based on fact or science-and likely atleast 95% of it is based on bullshit and bravado regurgitated from some other schlub who also did not experience any of what they claim and are also full of shit. If you don't like my bluntness- too bad. I am not here to please you, so move along, your approval is not desired nor is it needed. So before opening your pie hole and adding more stupidity, perhaps sit back, listen, absorb and learn something. You know that saying, it is better to remain silent and thought a fool than to open your mouth and remove all doubt!
riverszzr is offline  
post #9 of 9 Old 05-24-2017, 12:16 PM
World Superbike Racer
 
commiehunter's Avatar
 
Join Date: Apr 2015
Location: Portland
Posts: 1,685

I Ride: ZX6R 636
Quote:
Originally Posted by wildfire77 View Post
So anyway, in putting the head on, and tightening the bolts; the threads in the block sheered on one of them... (yes i'm following the torque specs per the manual 11ft/lbs then 39ft/lbs.) Has anyone ever heard of this on a current generation (2007-present) zx6r motor?
I ran newton/meter to ft/lb conversion the wrong way once and tore the head off a cylinder head bolt in a VW engine. Fortnately it was the bolt not the threaded hole that gave way.

Never ride faster than you can stop
commiehunter is offline  
Reply

  ZX6R Forum > ZX6R Forum > Mechanical and Technical

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
EZ Pull Clutch DIY sljackson Stunting 8 03-09-2016 07:29 PM
How To Pull FI Codes EvilTwin Guides 30 06-11-2012 10:08 AM
cylinder head questions DrewC Mechanical and Technical 7 09-28-2011 07:30 AM
head porting whats seen in gains pizzot Mechanical and Technical 31 09-20-2011 01:50 AM
& for my next medium distance day trip... kawasakifreak77 Motorcycle Talk 11 08-11-2009 09:15 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome