Cam lobes- insert borescope in oil filler /dip stick opening

[JWJR]

I just read an article In AOPA Feb 22 issue by Mike Busch. He mentions you can get a look at a few cam lobes in most Lycomings using a borescope down the oil filler tube. Has anyone here done this and willing to share details on how well they could see the lobes? …was it worthwhile? I assume you would do this with the oil drained and allow the engine to cool. It’s easy to remove the filler tube. Would this make it even easier?Do you need an articulating scope? Thanks in advance

 

 

Sent from my iPhone using Tapatalk

[EricJ]

44 minutes ago, JWJR said:

 

I just read an article In AOPA Feb 22 issue by Mike Busch. He mentions you can get a look at a few cam lobes in most Lycomings using a borescope down the oil filler tube. Has anyone here done this and willing to share details on how well they could see the lobes? …was it worthwhile? I assume you would do this with the oil drained and allow the engine to cool. It’s easy to remove the filler tube. Would this make it even easier?Do you need an articulating scope? Thanks in advance

 

 

Sent from my iPhone using Tapatalk

 

Here's a pic of a Lycoming four cylinder looking up at the crankcase from where the sump would be with the sump removed.   You can just see the edge of the port on the upper right where the oil dipstick/fill tube screws in.   Just above all this is the crankshaft, and then above all that is the cam.   I've no idea how anyone could expect to thread a magic borescope up through the drain slits and past the crank and connecting rods to see the camshaft.

[JWJR]

Thanks…. Maybe he meant to say Continentals. Sure looks like your not going to get a good look even if you could fish a scope down and back up.



Sent from my iPhone using Tapatalk

[Guest]

1 hour ago, JWJR said:

 

I just read an article In AOPA Feb 22 issue by Mike Busch. He mentions you can get a look at a few cam lobes in most Lycomings using a borescope down the oil filler tube. Has anyone here done this and willing to share details on how well they could see the lobes? …was it worthwhile? I assume you would do this with the oil drained and allow the engine to cool. It’s easy to remove the filler tube. Would this make it even easier?Do you need an articulating scope? Thanks in advance

 

 

Sent from my iPhone using Tapatalk

 

That works for the IO-540 and IO-720 but not the four cylinder versions.

Clarence