0-200 Oil Leaks

update to my chasing down my oil leak on my 0-200

starter replaced, leaking oil seal, replaced a pair of pushrod tube seals

with improved versions from Real Gaskets in cylinder 4, pilots side front cylinder,

removed two cylinder hold down nuts and sealed the studs threads with high temp rtv, also on cylinder #4

removed two nuts holding intake spider to seal the threads with high temp rtv.

the leaks were a combination of all of the above, test flight today clean and dry, no apparent leaks.

They say if an 0-200 is not leaking it’s out of oil!

Hope it lasts, the moral of the story is don’t give up!

Dave

Views: 2272

▶ Reply to This

Replies to This Discussion

Permalink Reply by christopher fryatt on August 10, 2020 at 8:43am

O-200A breather , longer one as supplied with O-200D

Permalink Reply by James Clapper Jr. on August 10, 2020 at 5:39pm

I would be interested in a more detailed explanation of how crankcase oil makes its way to the carburetor on a running engine. Thanks.

Permalink Reply by John A. Minatelli on August 15, 2020 at 4:52pm

It didn’t come from the crankcase Jim, it came from the intake valve spring area due to the increase in vacuum when the engine drops to idle (difference is 20” of water).  So any excess oil in the rocker arm area can get sucked back into the intake system on engine shutdown.  The decrease in pressure is a result of the throttle butterfly in the nearly closed position.  Still the observation is a bit rare even in a newly rebuilt engine.

John

Permalink Reply by James Clapper Jr. on August 16, 2020 at 7:34am

Ok thanks. I have a breather fitting extension on my engine, so I was interested in your observation. I always have a small amount of oil in the carb box area when I remove the lower cowl, so I may have the same situation you describe. The amount of oil is so small as to make locating the source difficult.

RSS

New from Zenith:

Zenith Planes For Sale 
  

Classified listing for buying or selling your Zenith building or flying related stuff...

Custom Instrument Panels
for your Zenith:

Custom instrument panels are now available directly from Zenith Aircraft Company exclusively for Zenith builders and owners. Pre-cut panel, Dynon and Garmin avionics, and more.

Zenith Homecoming Tee:

Zenair Floats

Flying On Your Own Wings:
 A Complete Guide to Understanding Light Airplane Design, by Chris Heintz

Builder & Pilot Supplies:

Aircraft Insurance:

 
 

West Coast USA:

 
Pro Builder Assistance:

 

Transition training:

Lavion Aero

K&S Aviation Services

Aircraft Spruce & Specialty for all your building and pilot supplies!

How to videos from HomebuiltHELP.com

Developed specifically for Zenith builders (by a builder) these videos on DVD are a great help in building your own kit plane by providing practical hands-on construction information. Visit HomebuiltHelp.com for the latest DVD titles.

© 2024   Created by Zenith.Aero.   Powered by

Badges  |  Report an Issue  |  Terms of Service