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  #1  
Old 04-04-2021, 12:35 PM
kovacjd kovacjd is offline
 
Join Date: May 2016
Location: Oviedo, FL
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Default IO-360 Engine Mount Nuts - How to tighten?

I'm ready to hang the engine, but before proceeding, I'm trying to figure out how I'm going to tighten and torque the nut on the upper left side. What special or modified tool is used?

Socket, wrench, crowsfoot...none of them are close to fitting in this tight spot.

Thanks in advance
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  #2  
Old 04-04-2021, 01:33 PM
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Ironflight Ironflight is offline
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Time to sacrifice a tool to the Lycoming gods....grind on a box-end wrench until it fits in there, and you might have to put the torque on the bolt head instead of the nut (figure out the additional torque due to drag, etc).

It’s also not all that hard to take the pushrod tube off if you really wanted to - but I never have, for that purpose....
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  #3  
Old 04-04-2021, 03:36 PM
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bjdecker bjdecker is offline
 
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What Paul alluded to -- in pictures.

It's not suitable to torque the nut, but it will hold it in place while you crank in the torque on the bolt head.
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  #4  
Old 04-04-2021, 03:36 PM
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wcalvert wcalvert is offline
 
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Yep ... cheap wrench meet Mr. grinder.

I did use a Flare Nut Spanner as the sacrificial tool. It grips a little further around the nut and seemed to work well.
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  #5  
Old 04-04-2021, 06:59 PM
xkape xkape is offline
 
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I have used these (obviously in the correct size) in the past with a small breaker bar to hold the nut while the head is torqued. I would recommend just grinding down a cheap box end wrench as the others suggested however.

https://shop.snapon.com/product/Flan...t-Wrench/ANM17
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  #6  
Old 04-05-2021, 08:16 AM
kovacjd kovacjd is offline
 
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Thanks for the feedback and pictures.

I acquired a 12-pt box wrench, hit it with the grinder and now have good access to hold the nut.

Glad the solution was so simple. For some reason, it didn't' come to my mind to do this. Needed the collective brains of VAF...

Kind Regards.
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  #7  
Old 04-06-2021, 08:31 AM
sloengineer sloengineer is offline
 
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Location: Small Town, Alabama
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Quote:
Originally Posted by Ironflight View Post
you might have to put the torque on the bolt head instead of the nut (figure out the additional torque due to drag, etc)..
I've seen tables in the past where K factor was tabulated based on nut vs bolt torque. Where might one find such for engine mount bolts?
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  #8  
Old 04-06-2021, 08:42 AM
Mitch757 Mitch757 is offline
 
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Wide deck cylinder base nut wrench worked when installing IO-540 on my neighbor's RV10.
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  #9  
Old 04-06-2021, 08:43 AM
Breezy Breezy is offline
 
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Josh,
I DITO on previous posts.
Something that will help with torquing via the bolt is a digital torque adapter. It will give an accurate measure of the drag, and final torque. If you lube the grip that will help reduce the drag and gauling. I test turn the bolt a full revolution to check for torque spiking.
Be sure to degrease the threads before installing the nut.
Here is a link to a torque adaptor: https://www.skygeek.com/ats-23154-to...7de7d8b022890a
There are many sources for these.
Cheers!
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  #10  
Old 04-06-2021, 09:31 AM
John Tierney John Tierney is offline
 
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The nut in the photo doesn't look correct. Mine is a castle nut with cotter pin.
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