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  #1  
Old 01-22-2023, 03:32 PM
rgaynor rgaynor is offline
 
Join Date: Dec 2018
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Default Engine mount to Firewall torque values

Hi everyone

Sorry if this has been asked and answered, I searched and couldnít find it. Section 5 gives torque values for an AN6 with std nut of up to 190 inch-lbs. nothing for with a locking nut. Anyone know where I can find the final torque values for those four AN6ís?

Thanks in advance.

Rob
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  #2  
Old 01-22-2023, 03:40 PM
daveyator daveyator is offline
 
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The common method is to torque to the minimum value, 160 inch pounds I think. If none of the slots align, keep tightening until one lines up and you can install the pin. You should get there before you hit 190.
Cheers DaveH
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  #3  
Old 01-22-2023, 03:42 PM
rgaynor rgaynor is offline
 
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Hi Dave

Thanks but wrong bolts I think. The engine mounts donít have cotter pins. They have locking nuts.

Rob
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  #4  
Old 01-22-2023, 03:51 PM
BobTurner BobTurner is online now
 
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I *think* I heard that Vans has changed to locknuts at this location.(??) If so, use a ‘bending beam’ (not click) type torque wrench to determine how much torque it takes to keep the nut smoothly turning with its locking feature fully engaged on the threads. Add this number to the torque you desire, set the sum on your wrench.
If you meant a castellated nut plus cotter pin, see previous post.
Edit. I see you did mean locknuts. This is a fairly recent change, expect confusion. You should have been determining the running torque of every locknut used on the build, and adding it to the desired bolt torque when torquing.

Last edited by BobTurner : 01-22-2023 at 03:54 PM.
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  #5  
Old 01-22-2023, 03:55 PM
rgaynor rgaynor is offline
 
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Definitely a self locking nut. Thanks Bob.
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  #6  
Old 01-22-2023, 04:42 PM
daveyator daveyator is offline
 
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Iím still living in the past
Cheers DaveH
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  #7  
Old 01-22-2023, 05:38 PM
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wirejock wirejock is offline
 
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Default Locking nut

Usually self locking nut on the inside.
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  #8  
Old 01-27-2023, 02:40 PM
gasman gasman is offline
 
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Nuts go on the engine side.....
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  #9  
Old 01-27-2023, 03:27 PM
daveyator daveyator is offline
 
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Thatís not an RV12, which I believe the op was referring to.
Cheers DaveH
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  #10  
Old 01-27-2023, 07:08 PM
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rcarsey rcarsey is offline
 
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Yes.. the RV-12 switched from castellated nuts to locknuts sometime after 2020. The method described earlier for castellated nuts is correct. The locknuts are convenient for torquing purposes.. but, I still like looking inside the cowl and actually seeing the cotter pins.
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