Technical Discussion Topics related to Technical Issues

Bent valves suck!

Old 02-27-2007, 09:42 AM
  #1  
Senior Member
Superstock
Thread Starter
 
Texassuperhawk's Avatar
 
Join Date: Dec 2004
Location: Houston,Tx
Posts: 267
Texassuperhawk
Bent valves suck!

Changed out my can chain tensioners this weekend and I goofed on the cam chain. It slipped and bent both rear exhaust valves when the bike cranked up. Luckily I have another set of heads in storage, so all I'm waiting on is a head gasket. The Valves luckily did'nt beat a hole in the piston before I could shut the engine down, only left some light marks on it. Next tim e I definitely will be more aware and alert than I was that night, not enough sleep and poor judgement almost put me back at square one.
Texassuperhawk is offline  
Old 02-27-2007, 10:12 AM
  #2  
Senior Member
SuperSport
 
AZZKIKER's Avatar
 
Join Date: Aug 2004
Location: MICHIGAN
Posts: 731
AZZKIKER is an unknown quantity at this point
you got lucky there. Time to port and polish the new heads.
AZZKIKER is offline  
Old 02-27-2007, 10:14 AM
  #3  
Senior Member
Superstock
Thread Starter
 
Texassuperhawk's Avatar
 
Join Date: Dec 2004
Location: Houston,Tx
Posts: 267
Texassuperhawk
naw not yet, I"m just swapping out the rear head for now, I have another engine that I'll be doing the hipo mods to, for another SHawk.
Texassuperhawk is offline  
Old 02-27-2007, 10:19 AM
  #4  
Junior Member
Squid
 
Join Date: Jun 2006
Location: Jacksonville, NC
Posts: 27
Jonny is on a distinguished road
Been there, done that...It sucks. Unfortunately I didn't have another set of heads in the garage.
Jonny is offline  
Old 02-27-2007, 10:45 AM
  #5  
Sprung
World Champion
 
Hawkrider's Avatar
 
Join Date: Dec 2004
Location: Fulton, MO
Posts: 105,285
Hawkrider will become famous soon enoughHawkrider will become famous soon enough
Duuuuuude, that sucks!
Hawkrider is offline  
Old 02-27-2007, 11:24 AM
  #6  
Senior Member
Back Marker
 
Dave Wicks's Avatar
 
Join Date: Oct 2006
Posts: 224
Dave Wicks is on a distinguished road
Sucks

Sorry to hear your bad news...
I know when I did mine I got annal about it but I slowed myself to try and do it right...It might help other guys if you spelled out what you did wrong..someone can learn from your pain..
Just a thought...make sure there are now sharp edges on the marks made in the pistons..dremel tool..gently smooth the edges etc..Sharp thin edges can cause heat build up...smooth is good.. don't remove a lot of material..just the roughness..

Dave
Dave Wicks is offline  
Old 02-27-2007, 02:30 PM
  #7  
Senior Member
SuperBike
 
L8RGYZ's Avatar
 
Join Date: Nov 2004
Location: Richmond, Virginia
Posts: 1,315
L8RGYZ is an unknown quantity at this point
Sorry to hear it, but sounds like you are up to the task if fixing it.

The CCT are easy to screw up & the price for it a PITA.
L8RGYZ is offline  
Old 02-27-2007, 02:43 PM
  #8  
Senior Member
Superstock
 
sprhawk neil's Avatar
 
Join Date: Feb 2006
Location: Merritt,MI.
Posts: 474
sprhawk neil is an unknown quantity at this point
I did mine last weekend I was very carefull to make sure I was at tdc per cyl. was this the cause of your cam chain slipping off? I followed the check valve clearence section
sprhawk neil is offline  
Old 02-27-2007, 02:53 PM
  #9  
Senior Member
Back Marker
 
superbikemike's Avatar
 
Join Date: May 2005
Location: Nova Scotia, Canada
Posts: 143
superbikemike
I'm not going to change mine any time soon for that reason. I've got 15000 miles.
superbikemike is offline  
Old 02-27-2007, 02:56 PM
  #10  
Senior Member
Superstock
 
sprhawk neil's Avatar
 
Join Date: Feb 2006
Location: Merritt,MI.
Posts: 474
sprhawk neil is an unknown quantity at this point
I was pretty nervous to but it went relitively smooth after reading the manual 1ooo times!!!!
sprhawk neil is offline  
Old 02-27-2007, 06:08 PM
  #11  
Senior Member
Back Marker
 
Join Date: Oct 2006
Location: WILLIAMS LAKE BC
Posts: 119
jamesvtr is on a distinguished road
sorry to here that they can be tricky you just have to take for time and not drink to much beer hahaha
jamesvtr is offline  
Old 02-27-2007, 10:28 PM
  #12  
Senior Member
SuperSport
 
shayne's Avatar
 
Join Date: Dec 2005
Location: Sunshine Coast, Australia
Posts: 963
shayne is on a distinguished road
Bad luck mate. Always pays to turn the engine over by hand first just in case.
shayne is offline  
Old 02-28-2007, 01:25 PM
  #13  
Senior Member
Superstock
Thread Starter
 
Texassuperhawk's Avatar
 
Join Date: Dec 2004
Location: Houston,Tx
Posts: 267
Texassuperhawk
My big screw up was not getting the rear cylinder at TDC , I just went at it without checking and when I pulled the stock tensioner I assume is when the chain slid around the exhaust cam gear, although I did'nt hear it, cause there was an extreme amount of noise in the shop from the [email protected] thats was being tested 5 feet from me. Put it together , started it and the valves collided with each other(intake to exhaust). Always follow the service manual, those fellas know thy're ****. So now I just have to play the waiting game til I get my head gasket. YEAH FUN!!! not.
Texassuperhawk is offline  
Old 02-28-2007, 03:20 PM
  #14  
Senior Member
Superstock
 
Birdoprey's Avatar
 
Join Date: May 2005
Location: titusville, fl
Posts: 470
Birdoprey is an unknown quantity at this point
damn harleys!! everytime I hang out with a buddy who rides a harley something starts leaking!! this last time it was coolant and his bike don't got no stinking coolant!!
Birdoprey is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Bandit400man
Technical Discussion
24
07-25-2013 09:02 AM
BURNOUTS MC
Technical Discussion
17
06-07-2012 07:51 AM
john3012
Classifieds
9
05-31-2011 06:42 PM
nykuryu
Technical Discussion
2
04-10-2011 07:10 PM
dickard37
Technical Discussion
19
01-13-2010 02:00 AM


Thread Tools
Search this Thread
Quick Reply: Bent valves suck!


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.

All times are GMT -7. The time now is 03:41 PM.


© 2019 MH Sub I, LLC dba Internet Brands