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JohnSchiavarelli 11-30-2009 01:16 PM

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??

tomtbone1993 11-30-2009 03:53 PM

rocker upside down?

johnnyboatman 11-30-2009 07:55 PM

maybe the stud backed out?

AO31 11-30-2009 08:16 PM

Needles left the fucrum?

bobbowobbo 11-30-2009 08:23 PM

pic?

Thunderstruck 11-30-2009 08:45 PM

Scratched the rocker with the wrench?

JohnSchiavarelli 12-01-2009 07:02 AM

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"..

mikes280 12-01-2009 12:14 PM

how big is the cam is there a chance the stud is rocking or flexing

JohnSchiavarelli 12-02-2009 03:31 PM

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 12-08-2009 08:13 AM

3 Attachment(s)
Some general shots of the valve train


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