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A6 crank bolt removal/install

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Old May 11, 2024 | 10:22 PM
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Default A6 crank bolt removal/install

I thought for sure I’d find a definite answer via search, but no such luck. Installing a Procharger. What’s the best way to keep the engine from turning over while removing/tightening the bolt on an automatic? Haven’t done this in awhile and forgot!
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Old May 12, 2024 | 01:55 AM
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I had to pull the starter and use a tool to lock the flywheel. Pulling the exhaust down out of the way can be a challenge.
I had to use heat on the flange nuts so they would not strip out.
I used a kit that I purchased online to pin the dampener to the crank, your kit should come with one.
Be prepared to torque that crank bolt to like 300#!
I had to buy a 3/4" torque wrench to go that high.
And get my buddy down under the car to help me pull on that wrench!
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Old May 12, 2024 | 08:23 AM
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I had the flywheel lock but i chose to use a 2 1/4 wrench slipped over the torque tube connector thru the inspection hole at bottom of bellhousing as it was easier than dropping my headers to drop the starter . Have someone hold it while turning , it will lock against the bell housing , then you can have at it .

My bolt was really hard to get off for some reason , I used a 1100 ft pound impact, a 36 inch breaker bar and then it finally let loose using the 36 inch breaker bar along with a 2 ft pipe slipped over it for additional torque, some come right off , others fight u to the end

Also there is no need to pin the harmonic balancer on an LT motor

Dave


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Old May 12, 2024 | 10:41 AM
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Really? There was no key or keyway on my engine.
Not a big problem on a NA motors, but I've heard of issues on blown motors spinning the dampener and ruining the crank nose.
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Old May 12, 2024 | 10:51 AM
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Originally Posted by dr.k.1
Really? There was no key or keyway on my engine.
Not a big problem on a NA motors, but I've heard of issues on blown motors spinning the dampener and ruining the crank nose.
Yep , was a big problem on the C6 but for some reason not on the C7 . Maybe if you are running big boost 🤔

Dave

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Old May 12, 2024 | 10:56 AM
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You sure your C7 was not keyed ?
see the A&A instructions below ....

Dave

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Old May 12, 2024 | 01:37 PM
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For me... didn't do anything to keep the engine from turning. Employed a Milwaukee 2767-20 ½” High Torque Impact Wrench after applying some heat... and my 2017 GS with automatic was definitely keyed. And I'm very glad the specification for the bolt and Innovator's West balancer I installed was only 130 lbs.
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Old May 12, 2024 | 01:53 PM
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Found a flywheel tool, all good. I remember how to do it now. Lol Been years.
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Old May 12, 2024 | 02:20 PM
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Originally Posted by JosephMingle


For me... didn't do anything to keep the engine from turning. Employed a Milwaukee 2767-20 ½” High Torque Impact Wrench after applying some heat... and my 2017 GS with automatic was definitely keyed. And I'm very glad the specification for the bolt and Innovator's West balancer I installed was only 130 lbs.
I have no idea why mine was so hard to get off .... , i had so much heat on it and it just would not budge .....
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Old May 13, 2024 | 01:13 AM
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Sorry! I was talking about my C6 not the C7! You are correct about the keyway.
Thanks for the Pics. I hope never to get into my new car!
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Old May 13, 2024 | 11:35 AM
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Originally Posted by Dcasole
I have no idea why mine was so hard to get off .... , i had so much heat on it and it just would not budge .....
I have to say, until I put heat on it I was very worried. The heat was magical... didn't take much either. I swear they painted that bolt with lock tight.

I can't imagine the pucker factor you experienced.
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