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Posted

Is it still normal to be getting some oil after changing the prop seal and o-ring?  They said some could get caught up in the hub area after the prop is removed and oil pours everywhere.  They cleaned it out as best they could, but he said it's possible some oil could blow out for a little while.  It's been 10 hours of flight time.  I wiped it out really well last weekend, and this is what I got after a 2 hr round trip flight to atlanta.  I used a shop towel to wipe it out today.

prop leak 0202.jpg

oil rag 0202.jpg

Posted

pends on how well they cleaned things up.   There could also be some settling of the seals.   Keep flying and wiping down with mineral spirits

  • Like 1
Posted

In my experience oil inside the ring gear support is a leaking crankshaft seal, not a leaking propeller.

Clarence 

Posted

Definitely looks like oil... not prop grease.

RB,

Did you get the usual seal, or the split one?

The usual seal requires pulling the prop  off.

The split one can be installed with the prop in place.

Clean really well and hope it is not still leaking.  

If it is still leaking, the Chances of it self healing?

Best regards,

-a-

Posted
8 hours ago, carusoam said:

Definitely looks like oil... not prop grease.

RB,

Did you get the usual seal, or the split one?

The usual seal requires pulling the prop  off.

The split one can be installed with the prop in place.

Clean really well and hope it is not still leaking.  

If it is still leaking, the Chances of it self healing?

Best regards,

-a-

I beg to differ on the split seal.  You would have to be a magician to install it without removing the prop.  A split seal merely avoids possible damage to the seal while stretching it over the crankshaft flange.  The amount of work involved remains the same.

Clarence

Posted

Wait let me get this right ... they installed a crank seal without pulling the prop?   No wonder it’s leaking.  I remember the 5 hrs of labor it took to R&R for the $30 gasket quite distinctly but there’s definitely a right way to do that job.  

Also I believe there’s a provision for use of gasket maker to set the gasket.  Could be a curing issue?  

 

EDIT- I now see that they pulled the prop.  If they need to redo it, have them put an extra alternator belt on and zip it to the top of the crankcase.  

Posted

Oops I did it again...

Apparently, i started another rumor....

I thought the purpose of the split seal was its ability to be installed with the prop in place... :)

My apologies.

Best regards,

-a-

 

Posted

Check the crankcase ventilation port on top, oil separator, the discharge hose and vent tube. If the ventilation is blocked (plugged oil separator) crankcase pressure build up will push oil out.

José

Posted

Have them redo the crankshaft seal...put it in boiling water to get it as pliable as possible...look for sharp nicks or tool marks on the edges of the propellor flange that can cut or damage the new seal.Remember the new seal (if one piece)has to be stretched over 3 times its size...that's why split seals were invented even though they leak if not installed perfect.That amount of oil is minimal compared to most bad seals I've seen.

  • Like 1
Posted

The trick the grumpy IA did was to use a 1"  vinyl tape on the prop flange.  I believe a large round screw driver and two of us wrestling it over was the trick.  5 hours seems a bit much. 

There is an expiration date on the super sticky stuff that holds the gasket in place.

Posted

My first airplane was a Franklin powered Stinson....fresh overhauled due to cracked cases when I bought from my cfi.Parts were old stock or not very good,any way I never could get a good prop seal ,and flew arround with oil mist on the windshield..now that was a leak!

Posted
4 hours ago, thinwing said:

The reason he is grumpy,is because he hates that job!

I think he was fine with the work, having to deal with people is another story

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