Moooney Pit
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I was thinking along those lines as well. I pulled #1 cylinder off, and rotated the crank. I installed #2 intake pushrod, to see when the sound is about to start at the cam gear. I found just before and after the apex of the cam lobe, the sound is heard at the cam gear. The cam gear seems to “slip” or catches up with the speed of the rotation to the fuel pump idler gear, after that point of the cam lobe. I’m hoping this is normal, until you actually run the motor, and get oil circulating etc. What do you think? -
I haven’t tried that yet. However I tried a few things. I removed all pushrods from each cylinder, and the sounds goes away, although when I checked the clearances, they were all in spec. I tried installing a pushrod, individually on each side of the cylinder, I.e Intake by it self, and the sounds comes back, for both intake or exhaust, on each cylinder as well.
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I bought it used, from a company called BAS. They sell used aircraft parts, and motors. They said it didn’t have a prop strike. The sound is coming from the cam gear, I just don’t know why. When you rotate the crank, the cam gear will make a “click” or skip sound. Not sure really what it sounds like, kind of hard to describe. From what I can gather, I think a pushrod is being slammed back after opening/closing a valve, which in turn is slamming the tappet back into the cam. I check valve clearances, and they are all in spec. I might have to double check though. Thanks for watching the video.
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Hey gang, can anyone tell me what that sound is? Is it a bent/spalled cam?Here is a link to the video i made of it. Thanks for your help.
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Thanks everyone, for the responses.
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Hello everyone. I just recently purchased a 1968 Mooney, without the engine with it. The original engine was an O-360 A1D. Does anyone know if I could retrofit a IO-360 A1A in it? Thank you!