Technical Discussion Topics related to Technical Issues

Timing jumped, possible damage.

Old 10-11-2011, 12:55 AM
  #1  
Not Realy A Squid
Squid
Thread Starter
 
Join Date: Sep 2006
Location: Portland Oregon area
Posts: 93
waltr is on a distinguished road
Timing jumped, possible damage.

All right everyone looking for some advice.
I am looking at a 99 that needs some valves replaced.
After questioning the current owner it sounds like the cam timing jumped. I know about the CCT issues and suspect that is what happened. The current owner was told it would cost $1500 to fix it.
I am fully capable of fixing this myself and am not the least bit afraid of the job.
Now for my questions. What is the normal damage when this happens? I know the valves but do the guides get damaged? What about the piston? Does it get ruined by the valves? Does the rod ever get damaged?
I do not have the bike so I am trying to get these answers to decide if it is worth it and how much I should offer.

Thanks for the help.
waltr is offline  
Old 10-11-2011, 01:52 AM
  #2  
Moderator
MotoGP
 
E.Marquez's Avatar
 
Join Date: Apr 2006
Location: Kempner, TX
Posts: 4,254
E.Marquez is on a distinguished road
Valves in the effected head.

So you’re likely to need, 4 valves, valve seals, 4 sets of cotters, ,, me Id replace the springs as well.
Then a head gasket, set of MCCT’s, coolant and oil.

It’s possible a valve guide can be damaged when the valve is bent, and if the timing caused a valve / piston crash at higher RPM, the piston can be damaged as well.

If I were bidding on a used bike having this issue.. I would assume the worst, and price the bike accordingly
E.Marquez is offline  
Old 10-11-2011, 02:17 AM
  #3  
Senior Member
SuperBike
 
Wicky's Avatar
 
Join Date: Sep 2008
Location: Essex, UK
Posts: 1,638
Wicky is on a distinguished road
See if you can locate a second-hand (front?) head and transplant that on.

FRONT CYLINDER HEAD COMPLETE
Wicky is offline  
Old 10-12-2011, 08:28 AM
  #4  
Senior Member
Back Marker
 
Join Date: Apr 2011
Posts: 201
msethhunter is on a distinguished road
Depending on how bad the damage is to the pistons, you might want to replace them as well. It can create a pressure spot in the piston, as well as a place for a crack to start from, and well, I'm sure you can imagine the damage when a piston comes apart at 9500rpm.
msethhunter is offline  
Old 10-12-2011, 08:57 AM
  #5  
Senior Member
SuperBike
 
Wicky's Avatar
 
Join Date: Sep 2008
Location: Essex, UK
Posts: 1,638
Wicky is on a distinguished road
Wicky is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Hangfly
General Discussion
19
07-16-2015 07:18 AM
tmoyer690
Technical Discussion
14
04-03-2013 01:02 AM
SuperHawkins
General Discussion
6
01-05-2007 07:01 AM
Rufion
Technical Discussion
3
04-16-2006 12:45 AM
Jason C
General Discussion
4
09-18-2005 04:08 PM


Thread Tools
Search this Thread
Quick Reply: Timing jumped, possible damage.


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.