Torque value for O-360-A1D, 1965 M20C, oil sump to case

[BigD]

Bolts in picture are to 0-360-A1D measured to be 1/4 inch. Standard torque table shows 96-106 inch pounds. If that’s the case, they ARE loose! My wrench does foot pounds which would equate to 8-8.83 foot pounds. Feel free to check my math. Am I looking at this correctly? Thanks! 

[PT20J]

Torque values agree with Lycoming SSP-1776 and the math is right. However, that seems like a low value for a torque wrench calibrated in ft-lbs. I might get an in-lb wrench where 100 in-lb is closer to mid scale and recheck. 

What's up with the red RTV? Maybe someone tried to fix a leak? That may be what caused the bolts to lose torque as the RTV shrunk.

[carusoam]

Factor of 12 just like you would expect…

But, if your wrench only does ft-Lbs…

Check the accuracy at its low end…

Torque wrenches are pretty low cost this century… compared to past…

 

Then there is that whole discussion on calibration…

 

PP thoughts only…

-a-

[BigD]

Torque values agree with Lycoming SSP-1776 and the math is right. However, that seems like a low value for a torque wrench calibrated in ft-lbs. I might get an in-lb wrench where 100 in-lb is closer to mid scale and recheck. 
What's up with the red RTV? Maybe someone tried to fix a leak? That may be what caused the bolts to lose torque as the RTV shrunk.

Correct on all accounts… *sigh


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[Guest]

The nut and bolt in the second picture are the wrong p/n.  That an MS21042-4 nut instead of an STD1411 Lycoming nut.

[PT20J]

2 hours ago, M20Doc said:

The nut and bolt in the second picture are the wrong p/n.  That an MS21042-4 nut instead of an STD1411 Lycoming nut.

Ah, the eagle eye of a pro. Priceless!