Torque steel bolt into aluminum casting

[tomcostanza]

Hi,

I'm mounting the prop governor with an AN5 bolt into aluminum threads. Does anyone have info on torque specs?

Thanks,

[rzbill]

Check your thread pitch before you do that. There is also a Lycoming document that covers it. Unfortunately, it is not at hand. Maybe somebody else can provide a link for you.

[868RM]

Tom, I am pretty sure those bolts are course thread. Also check lyc. service instruction 1438a (plate lw-12347 & two 72053 gaskets) to see if it applies to your applications. It applies to my engine as I am adding it now to fix an oil leak @ 51 hours. Ron