Oil suction screen - torque?

[Geoff]

Does anyone have a torque value for the oil suction screen nut in the sump?

I'm guessing 300 in-lb like the vernatherm and the oil pressure relief valve, but I can't find a reference in the Lycoming overhaul manual.

Thanks.
-Geoff

 

[hevansrv7a]

Superior's answer

Superior's answer was not in torque values but in degrees past finger tight. Look it up in their manual if yours is a Superior.

 

[Steve]

The chart is in the Lyc OH manual (spec and torque values chapter). I'm not sure if it applies when using an old gasket. I can't remember what that type of gasket is called.

Steve

 

[az_gila]

By angle...

This is the chart that Steve refers to...
I am sure it is for new gaskets only... after all, a crush gasket is crushed during it's first (and only) use...
Note that there is also a correct orientation of the gasket.

Table 72-00-11.5 • Crush Type Gasket Tightening Angles

Description of Limit...........................Angle (approx.)
Oil Suction Screen Gasket ....................... 135º
Pressure Relief Valve Gasket.......................90º
Oil Cooler Bypass Plug Gasket....................135º

NOTE: Install Crush Gasket with seam toward aluminum case. Tighten thread until cap or valve body contacts gasket. Turn additional angle shown above. Lock wire in place.

gil A