Thread: Broken rocker arm, any idea's
12-06-2009, 04:18 PM #1
Broken rocker arm, any idea's
Well it was a very short ride for me today, ski shutoff less than a mile from the ramp. Took it home and this is what I found..... Any ideas as to what might have caused this? Is this a common failure with an aftermarket ecu? Thanks in advance !!! Anyone have an extra one?
12-06-2009, 05:10 PM #2
12-06-2009, 05:53 PM #3
need to get the head off, but from what I can see everything looks good. I did have a previous problem with an intake valve breaking and the piston came up and smacked the valve. Maybe it cracked the arm and it just finally came apart?
12-06-2009, 06:20 PM #4
12-06-2009, 06:31 PM #5
I'd be surprised if you didn't have bent, broken or binding with that set of valves.
The rocker arms are very strong camparitively.
Are the valve springs ok?
Get a look inside. Use a mechanics endoscope with the mirror end fitted.
They are the best thing you can get for cylinder problems as a quick look.
One of the major manufacturers makes one, and it is superb for pumps, cylinder, under the engine... almost anywhere, and you can big screen it too!!
12-06-2009, 06:31 PM #6
which valve train upgrade are you running? Were you hitting the limiter?
12-06-2009, 07:07 PM #7
Running the Ferrera valve springs, last time the head was off the spring pressure was 80 closed and about 120 open. These are stock 2008 valves. I was about 8,000 rpm when this happened. I'm running a Riva ecu. The timing chain is fine
12-06-2009, 07:47 PM #8
- Join Date
- May 2005
I'll bet the previous touchdown stress the arm. Best luck.
12-06-2009, 09:00 PM #9
12-06-2009, 09:01 PM #10
Thanks Jim, You wouldnt have an extra laying around would you?
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