cylinder torquing tools

Jabiru 2200 / 3300 discussions

cylinder torquing tools

Postby mccool » Sat May 04, 2024 3:43 pm

I'm reassembling my gen 2 3300, new pistons, heads refurbished to gen 3 spec. Using the 12 point 7/16 nuts. I'm ready to torque down the cylinders.
My issue is that I don't think a 1/2" open end crows foot will grip the nuts properly when torquing. A ring wrench would seem to be a better choice, but I don't see any such available as a crows foot. The universal 1/2" socket doesn't fit in the space available either.
Sooo, seeing that many have gone before me, I'm asking what solutions others have used to get a torque wrench on those nuts.
mccool
 
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Re: cylinder torquing tools

Postby sonex892. » Sat May 04, 2024 8:43 pm

If you can tig weld or know someone who can its easy. I made my own by cutting a ring spanner and tig welding a cut off square section of a socket. Then tested it at a higher torque before actually using. I would recommend checking the calibration of your torque wrench before use. The torques on the through bolts feel really high for the hardware.

Are you replacing the flywheel bolts while you are at it? The loctited flywheel bolts breaking at 500 hrs, gave me a chance to experience an engine failure, spend $5k AUD on parts and rebuild the engine.
Steve
Lazair kit 1981 sold
Sonerai 2LS plansbuilt 2003 sold
Sonex kit 2010
Sonerai 2LS project rotax 912
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Re: cylinder torquing tools

Postby austexaviator » Sat May 04, 2024 9:04 pm

What you need is called a torque adapter, not a crows foot. I bought this set on Amazon for that exact purpose. You could just buy the single wrench but I figured I may as well buy the set.
https://www.amazon.com/gp/product/B09DM ... =UTF8&th=1
https://www.amazon.com/gp/product/B09DMWHPSB/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&th=1
Patrick
Tailwheel Sonex Model A Jabiru 3300
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Re: cylinder torquing tools

Postby mccool » Sun May 05, 2024 9:43 am

That looks like the perfect solution! I can't weld, and getting just the one adapter works for me
Thanks Guys!
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