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oil leaks

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bu131(at)swbell.net
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Posted: Fri Aug 04, 2006 4:53 am Post subject: oil leaks

question for the forum? my m14 has about 300 hrs

  when in use I can keep the tank up, uses about a liter per hour of flight time 

  when it sits (which it does between aerobatic competitions since I have little time for practice) in 2 weeks the entire 10 -12 quarts disappear (well. it goes to the floor I have the messiest hangar at the airport very nasty lady...) I think this is excesive oil leak I use aeroshell 15 50 synthetic. Since I have 800 hrs in my 1340 T6 that has been in the same hangar for 20 years and well behaved (it leaks a bit) I have something to compare and does not come close to it. the oil problem has become so that I am using more oil than gas. When i go to the hangar I have to refill the tank so often that I am cutting my flying time.

  the engine performs well compression is good, most of the oil comes out of the intakes and the kimball drain system that I have, 

  any suggestions besides overhauling  it? or running the oil back into the tank?

  thanks

  andres

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dsavarese(at)elmore.rr.co
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Posted: Fri Aug 04, 2006 5:24 am Post subject: oil leaks

Remove the oil shut off valve from the oil pump; check the0 spring and make sure it is not cracked or bent; resurface the valve; inspect the0 seat; reinstall.  The other alternative is to install an oil shut off valve0 like the one Jim Kimball sells.  I believe it interlocks to the start0 switch.

 Dennis

  

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wlannon(at)cablerocket.co
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Posted: Fri Aug 04, 2006 6:51 am Post subject: oil leaks

Andre;

  

 The primary problem is the oil you are using.0 Aeroshell W15W50 is totally unsuitable for radial engines. Surely you are not0 using this in the R1340, if you were you would have exactly the same0 problem.

 If you want a multigrade Phillips X/C 25W60 is the0 only one - for any radial. I would not recommend their 20W50 - Not near0 as bad as W15W50 but still not adequate.

  

 If not multigrade I would recommend Aeroshell W1200 (summer) and W100 (winter - with preheat)

  

 Walt

  

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dsavarese(at)elmore.rr.co
Guest

Posted: Fri Aug 04, 2006 2:51 pm Post subject: oil leaks

Thank you Walt for confirming that 15w-50 is inadequate0 for radial engines.

 Dennis

  

 [quote]   ---

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viperdoc(at)mindspring.co
Guest

Posted: Fri Aug 04, 2006 9:00 pm Post subject: oil leaks

Your oil check valve is gooped up. So when it sits the oil flow is not shut off from the tank. It flows back into the engine and out the stacks. 

 Doc

  

 



  

 [quote] ---

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bu131(at)swbell.net
Guest

Posted: Sat Aug 05, 2006 4:53 am Post subject: oil leaks

hello roger et al:

   

  thanks to all the responders, I shall switch to 120w (indeed the T-6 uses it exclusively), will check the oil check valve and install the darn kimball oil shut off with the switch so I do not run the engine dry. What will one do without the forum? thanks a bunch

  andre

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shankeroid(at)comcast.net
Guest

Posted: Sat Aug 05, 2006 8:03 am Post subject: oil leaks

Andres,

     Sounds like the Oil Pressure0 Reducing Valve.  Although I have a CJ with the Chinese motor, I believe the0 part is the same.  I changed mine out and solved the problem of excessive0 oil leaks while the airplane is "sitting."  Check out the reply to my0 question back in September.

 http://www.matronics.com/searching/getmsg_script.cgi?INDEX=33279592?KEYS=excessive_oil?LISTNAME=Yak?HITNUMBER=5?SERIAL=08522525652?SHOWBUTTONS=YES

  

 Jim Shanks

 shankeroid(at)comcast.net

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Desmor944(at)aol.com
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Posted: Sat Aug 05, 2006 10:44 am Post subject: oil leaks

In a message dated 8/4/2006 9:27:58 AM Eastern Daylight Time, dsavarese(at)elmore.rr.com writes:

 

  	  Quote: 	
		  Remove the oil shut off valve from the oil pump; check the spring and make sure it is not cracked or bent;0resurface the valve; inspect the seat; reinstall.  The other alternative is to install an oil shut off valve like the one Jim Kimball sells. 0I believe it interlocks to the start switch.

  Dennis

 	


 

 Dennis,

 

 Once the valve is removed from the pump, how is it disassembled to accomplish the above?  Is the plug/valve guide/spring seat pressed in or threaded?

 

 Thanks for all the advice provided to the list.

 

         Rich Desmond

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dsavarese(at)elmore.rr.co
Guest

Posted: Sat Aug 05, 2006 2:28 pm Post subject: oil leaks

The pressure relieve valve is held in by a spring.  The0 valve is behind the oil pressure adjuster screw.  Remove the adjuster0 assembly and you will see the spring and valve.

 Dennis

  

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