shadowster
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what would cause a rocker arm to snap in half , happened 2 weeks a go to a mate of mines slitty then it happened again yesterday to another one, any ideas
If hydraulic lifters did one malfunction?or overrevving..I had one break on a flat4 citroen GS years ago & I used to rev the nuts off itwhat would cause a rocker arm to snap in half , happened 2 weeks a go to a mate of mines slitty then it happened again yesterday to another one, any ideas
If hydraulic lifters did one malfunction?or overrevving..I had one break on a flat4 citroen GS years ago & I used to rev the nuts off it
what would cause a rocker arm to snap in half , happened 2 weeks a go to a mate of mines slitty then it happened again yesterday to another one, any ideas
First, forget all about a bent CAMSHAFT!
These are so hard they don't bend. EVER.
You might SNAP one, but you won't bend one.
Either ...
It's fatigue failure - just too many operations, but I think that is unlikely, and VERY unlikely to happen twice so close together. Was the second broken rocker from the same cylinder?
Or ... a valve has been obstructed somehow BIG TIME, usually meaning it has hit or been hit by a piston, or an OBJECT has become sucked into a cylinder and gotten trapped between a piston and a valve, stressing the rocker so much it snapped. In Landy engines it is usual for pushrods to give way and bend, but other engines may have other components fail instead. Basically, when it happens "something in the valve train has to give".
Someone with a "practiced eye" would be able to look at the break points and tell you if it was FATIGUE or IMPACT STRESS.
Is he running with the air filter element missing?
CharlesY
just been told this is the 3rd rocker arm ,all diffrent ones . no black smoke or loss off coolant
Check the c shaped springs between the rockers are still intact. It's not unknown for them to break-up causing the broken bits to float around under the rocker cover.
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