REFLECTOR: Sticking Valves

[Ron Brown]

Here's something I found at Lycoming's site on adjusting oil pressures:

http://www.lycoming.textron.com/main.jsp?bodyPage=/support/troubleshootingGuide/highOilPressure.html

Take care here - I recall one case of a failed oil cooler on a Velocity 
leading to destruction of the engine before landing.  (However - our oil 
coolers are supposed to be able to handle 500 psi and a similar amount for 
Champion spin on oil filters as well).

Ronnie

----- Original Message ----- 
From: "Ron Brown" <romott at adelphia.net>
To: <reflector at tvbf.org>
Sent: Thursday, October 20, 2005 9:14 AM
Subject: REFLECTOR: Sticking Valves


>I haven't heard much on the Reflector lately about sticking valves - also 
>called "morning sickness" on Lycoming engines.  But here is an interesting 
>article by Bill Marvel and Bill Scott.  They have always contended that 
>Lycoming has had an old long standing deficiency in their valve train 
>oiling system.  Basically, not enough oil gets pumped to the valve stems 
>and rockers on most Lycoming engines.  This results in coking of the valve 
>stems, sticking valves and in severe cases, bent push rods requiring a tear 
>down.
>
> http://egaa.home.mindspring.com/new.htm
>
> More history on the problem is at 
> http://www.prime-mover.org/Engines/Marvel/index.html
>
> Ronnie
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