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I had occasion recently to remove a cylinder from my C85 to lap the valves in.
As part of my normal procedure, I remove the hydraulic tappets to deflate them prior to reinstalling the push rods.
To do this, I removed the push rod housing casting from the case.
I noticed that the little "ears" had been ground off from inside the push-rod housing (this engine was overhauled about 4 years ago with the O-200 upgrade). The normal purpose of these ears is to prevent the cup at the inner-most end of the pushrod from coming away from the engine when removing the pushrod.
So the question to myself was: what NOW stops the cup from coming away? The answer is a little circlip that fits in the inside bore of the follower.
I hope this may help someone else who has not come across this retention circlip before.
As part of my normal procedure, I remove the hydraulic tappets to deflate them prior to reinstalling the push rods.
To do this, I removed the push rod housing casting from the case.
I noticed that the little "ears" had been ground off from inside the push-rod housing (this engine was overhauled about 4 years ago with the O-200 upgrade). The normal purpose of these ears is to prevent the cup at the inner-most end of the pushrod from coming away from the engine when removing the pushrod.
So the question to myself was: what NOW stops the cup from coming away? The answer is a little circlip that fits in the inside bore of the follower.
I hope this may help someone else who has not come across this retention circlip before.
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