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Case bolt removal
Posted by: Tim Sheedy ()
Date: January 11, 2019 07:43PM

Question on case bolt removal
I am splitting the cases on my '66.
I have a heavy duty electric impact driver and the case bolts wont budge.
Tried nut and bolt head side and no movement at all.
Any suggestions?

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Re: Case bolt removal
Posted by: MattNall ()
Date: January 11, 2019 07:45PM

Electrics are usually only 60ft lb.... until you let it Hammer 100 times...

Use a Breaker bar.





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Re: Case bolt removal
Posted by: Tim Sheedy ()
Date: January 11, 2019 07:47PM

Will do thanks

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Re: Case bolt removal
Posted by: vairmech ()
Date: January 12, 2019 06:10AM

I use an air impact on the case bolt nuts all the time and they usually zip right off. There were a couple I had to use the big ratchet on to break the torque/rust initially. Your electric, define HD with the brand, may not have enough oomph to even budge anything more than a 3/8 nut.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: Case bolt removal
Posted by: joelsplace ()
Date: January 12, 2019 08:06AM

As Ken said electric doesn't tell us much. I've seen ones that wouldn't do much but I have a 1/2" Dewalt that is stronger than my Snap-On 1/2" air. I used it to remove the head bolts on my 429 Ford recently. It spun them out like they were loose.

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Re: Case bolt removal
Posted by: Max Roeder ()
Date: January 14, 2019 01:09AM

Best practice: loosen nut from nut side only. Too much torsional energy is absorbed by body and head contact of a bolt unless they are no greater than 2-3X diameter.
Tighten then loosen, repeat a few times. Make sure bolt threads are clean and free from rust and other materials that will bind the loosening/ removal process.
Soak with good penetrating oil or 50/50 acetone and transmission fluid. Soaking means time, liberally apply penetrant, wrap with cotton cloth, saturate cloth. After 24 hrs, no luck, clean up the flamables and heat nut bolt end using a good high heat flame to concentrate heat into steel and not allow the aluminum to absorb all your heat. Allow cooling, loosen/ tighten/ loosen again. Repeat above process until you give up. Then it will probably take some metal removal by drilling out the bolt/nut end. Time is your friend in these predicaments!

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Re: Case bolt removal
Posted by: dryenko ()
Date: January 14, 2019 06:48AM

Kroil is the answer..

Bob C aka Dryenko
Dobson, NC 27017

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