Breaking Crank Nut Loose
Thread Starter
Burning Brakes
Joined: Jan 2002
Posts: 885
Likes: 0
From: The Woodlands Texas
Breaking Crank Nut Loose
I am in the beginnings of a heads and cam swap and am just about down to the part where you need to remove the crankshaft nut if you want to get the pulley, oil pump, etc off. Question - how do you keep the crankshaft from rotating while pulling on the wrench to break the nut loose? I have a 6-speed manual.
Drifting
Joined: Jun 2004
Posts: 1,627
Likes: 143
From: Goodyear Az
What I did in my Z28 M6, prior to the Corvette, was to put it into 6th gear and block the rear tires. I figured that the motor would put out more torque than I could, and if the trans could tolerate the torque in 6th that the motor could put out, it would handle the torque I could do. The bottom line is that it worked... 6th gear, wheels blocked, and I was able to remove the crank bolt. Same thing for installation.
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
I have used 5th gear usually but obviously 6th works as well. I use my heavy-duty jack handle to give me good leverage. The more leveage you have, the less chance of losing control of the release and the safer. Take your time and even have a friend help with this portion and the upcoming torqueing procedure when you install your new pulley bolt.
Safety first and always.
Safety first and always.
Safety Car
Joined: Jul 2004
Posts: 3,904
Likes: 29
From: Vancouver Washington
Well, I glad to hear this. I've spent two weeks and two unsuccessful ebay attempts at trying to buy a Kent-Moore J-42386 LS1 flywheel holding tool. By the way, who does just sell these Kent Moore tools anyway???
Burning Brakes
Joined: May 2006
Posts: 813
Likes: 2
From: Norco La.
I used an 18" pipe wrench on the old pulley. Bind it against the frame and loosen the bolt. Everyone hold your breath now... I used it to install my brand new Powerbond UD pulley. I wrapped the jaws on the pipe wrench with lots of rags and applied steady pressure to remove the bolt. I'll challenge anyone to find marks on the new pulley from the pipe wrench.
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