Quote:
Originally Posted by GregWeld
Appears to me that you have contact with the retainer.... Not an uncommon issue with the aluminum rocker arms.
Make sure you check the rocker arm to retainer clearance. There should be at least .040” to .050” clearance at the closest point under the rocker arm and the top of the retainer.
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^^^THIS^^^
It's not the proper way... but sometimes you have to grind some on alum rockers to clearence big OD retainers and springs Or install lash caps or longer tipped valves or different retainers if "installed hights" can still be achieved correctly
[QUOTE=Track Junky;471873]
Question is if the timing chain breaking had something to do with it......:headscratch:
If you're asking If the rockers hitting the retainers due to chain breakage The answer is...very unlikely..Hard to tell by the pics, Those look like they've been hitting for a while
Quote:
Originally Posted by Track Junky
Not sure I consider 6500 high reving Greg. In addition lash caps are used to correct drive train geometry.
and or correct length push rods
In order to reach a conclusion I imagine would probably have to put together all the variables and do the math.....how much was removed from the deck of the block, piston to deck dimension, valve stem length, spring assembled height, push rod length, gasket thickness, piston to valve clearance, etc, etc..
As soon as I get the other three rocker arms I'll run the drive train through it's motions and do a little more investigating.
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What exactly are you trying to figure out?? PM me if you like
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In this pic, is the roller on the rocker that far back on the valve tip w/ the valve closed, is there lash?? If so your push rods are wrong or that rocker is hitting the retainer and pushing it back
Here is a dumb video but will give you an idea
https://www.youtube.com/watch?v=XnS46ahJVqI
A couple of write ups
http://www.compcams.com/Products/CC-...rods%27-0.aspx
http://www.circletrack.com/techartic...h/viewall.html
