Like Tree0Likes

Rocker Damage

Reply

Old 11-30-2009, 02:16 PM
  #1
Registered
Thread Starter
 
Join Date: Apr 2004
Location: Charlotte, NC
My Boat: 2001 Velocity 260
Posts: 217
Default Rocker Damage

540 BBC Hyd rol cam.. #7 Intake Rocker seems to be damaged right where the Lockdown nut is.. Looks like the nut & rocker were scraping??? weird.. Just adjusted the valves about 2 months ago.. Did not notice it then.. Only difference this time went a tab tighter on the valves.. closer to 3/4 then 1/2 turn. did not notice anything out of the ordinary running wise.. no new noises.. ( i will post pic tonight when I can)..
Any ideas why the nut and rocker would meet? Other then I tightened it down a tad to tight.. Perhaps bad lifer? Spring??
JohnSchiavarelli is offline  
Reply With Quote
Old 11-30-2009, 04:53 PM
  #2
Registered
iTrader: (3)
 
tomtbone1993's Avatar
 
Join Date: Sep 2003
Location: LAKE CONROE, TX
My Boat: 42 FOUNTAIN / MALIBU
Posts: 15,488
Default

rocker upside down?
tomtbone1993 is offline  
Reply With Quote
Old 11-30-2009, 08:55 PM
  #3
Platinum Member
Platinum Member
iTrader: (5)
 
johnnyboatman's Avatar
 
Join Date: May 2001
Location: NO WHERE
My Boat: FASTEST INNER TUBE
Posts: 3,358
Default

maybe the stud backed out?
johnnyboatman is offline  
Reply With Quote
Old 11-30-2009, 09:16 PM
  #4
Registered
 
Join Date: Nov 2005
Location: North Barrington
My Boat: American Offshore
Posts: 571
Default

Needles left the fucrum?
AO31 is offline  
Reply With Quote
Old 11-30-2009, 09:23 PM
  #5
Gold Member
Gold Member
 
bobbowobbo's Avatar
 
Join Date: Dec 2008
Location: west mi
My Boat: 87 BAJA FORCE 320
Posts: 215
Default

pic?
bobbowobbo is offline  
Reply With Quote
Old 11-30-2009, 09:45 PM
  #6
Charter Member
Charter Member
 
Thunderstruck's Avatar
 
Join Date: Nov 2000
Location: Lake Charles, LA USA
My Boat: 1998 32' Active Thunder (Sold)
Posts: 1,094
Default

Scratched the rocker with the wrench?
__________________
Long time cult member.
Thunderstruck is offline  
Reply With Quote
Old 12-01-2009, 08:02 AM
  #7
Registered
Thread Starter
 
Join Date: Apr 2004
Location: Charlotte, NC
My Boat: 2001 Velocity 260
Posts: 217
Default

That last comment was a good one.. I will have to post a pic tonight.. The stud backing out sounds logical I assume..

I also assume a weak/broken spring as well as a worn cam lobe as well as a weak/broken lifter "could" result in this?? I would tend to think with any of the above scenarios, I would have noticed something running "weird"..
JohnSchiavarelli is offline  
Reply With Quote
Old 12-01-2009, 01:14 PM
  #8
Registered
 
mikes280's Avatar
 
Join Date: Feb 2001
Location: charlotte nc.
My Boat: velocity/proline
Posts: 1,849
Default

how big is the cam is there a chance the stud is rocking or flexing
mikes280 is offline  
Reply With Quote
Old 12-02-2009, 04:31 PM
  #9
Registered
Thread Starter
 
Join Date: Apr 2004
Location: Charlotte, NC
My Boat: 2001 Velocity 260
Posts: 217
Default

Mike
have to check and take a pic tomorrow.. rain is crazy today..
I don’t think anything has flexed or changed.. I think it (more than likely) has something to do with my last valve adjustment.

One weird thing though.. The #7 plug was a little darker than the rest.. not much.. but noticeable.. all the other plugs looked perfect.

Perhaps a leak down test is in order?? I did a compression test back 2 months ago(when I did the valves). Each cyl was 150+- a few.. Looked good.
JohnSchiavarelli is offline  
Reply With Quote
Old 12-08-2009, 09:13 AM
  #10
Registered
Thread Starter
 
Join Date: Apr 2004
Location: Charlotte, NC
My Boat: 2001 Velocity 260
Posts: 217
Default

Some general shots of the valve train
Attached Thumbnails Rocker Damage-rocker2.jpg   Rocker Damage-rocker3.jpg   Rocker Damage-rocker6.jpg  

JohnSchiavarelli is offline  
Reply With Quote

OSO Sponsor
OSO Advertiser
OSO Advertiser
OSO Advertiser