wingtime
Well Known Member
I have a O-320-E2D in a 150 (yes, I know a spam can question on a RV site) of mine that has a noise we can't seem to figure out. It is a mid time engine with about 300 STOH. It has started making a clicking sound that you can clearly hear while running. It's not a knock more of a loud click.
The engine is not making any metal and all the compression is good. At first we thought it was a lifter not pumping up or something since it tents to get a tad quieter when the engine warms up. We pulled all the rocker box covers and the valve "lash" is good and we didn't see a valve sticking. When you pull the prop thru by hand you can hear the click and it seems to be comming from the front pilots side cylinder (I forget what # that is) on the copression stroke. Funny thing is if you pull the prop back (Backwards) from the compression stroke it clicks too. When we pulled the spark plug the noise goes away. I've had several people listen to it and they are stumped. I had one IA who suggested it could be a hung up wrist pin and the noise is comming from the little keepers or plugs moving back and forth.
Before I pull a jug I was wondering if anyone on here might have a suggestion. The engine did a tid bit of sitting for a few months last year so that could be a contributing factor.
Thanks!
The engine is not making any metal and all the compression is good. At first we thought it was a lifter not pumping up or something since it tents to get a tad quieter when the engine warms up. We pulled all the rocker box covers and the valve "lash" is good and we didn't see a valve sticking. When you pull the prop thru by hand you can hear the click and it seems to be comming from the front pilots side cylinder (I forget what # that is) on the copression stroke. Funny thing is if you pull the prop back (Backwards) from the compression stroke it clicks too. When we pulled the spark plug the noise goes away. I've had several people listen to it and they are stumped. I had one IA who suggested it could be a hung up wrist pin and the noise is comming from the little keepers or plugs moving back and forth.
Before I pull a jug I was wondering if anyone on here might have a suggestion. The engine did a tid bit of sitting for a few months last year so that could be a contributing factor.
Thanks!