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Pulley fell off, sheared woodruff key, FIXED

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Old 06-25-2012, 12:47 PM
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2014 AMG E63S, 2006 XK8 victory edition convertible, 2006 supercharged trailblazer SS, 2001 E430
Pulley fell off, sheared woodruff key, FIXED

Ok so here is the VERY short version of a VERY long story. My pulley fell off (wasn't torqued to the +90 & wasn't my fault... don't ask) and sheared off my woodruff key. Didnt want to have to remove the timing cover, chain, gear, etc. to fix it. SO, did some research and found a good solution (IMO) for a fix. Thanks to GT-ER, Shardul, Chawkins and everyone else who chimed in with good info, ideas, and support. Sorry for the HUGE lack of details but it would be nothing short of writing a novel to explain the whole situation. Anywho, here are a couple pics.

drimmeled out the end of the crank a little



Then JB welded in a super strong piece of steel (not sure the exact kind/grade) bolted the pulley up and torqued it down CORRECTLY and...... as good as new or better IMO


Last edited by nizzle; 06-25-2012 at 12:59 PM.
Old 06-25-2012, 12:59 PM
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Good luck with your new fix!! Way to many Pulley Failures are happening lately.
Old 06-25-2012, 01:02 PM
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2014 AMG E63S, 2006 XK8 victory edition convertible, 2006 supercharged trailblazer SS, 2001 E430
^ Thanks & Very true! 148 ft lbs +90 or FAILl!!
Old 06-25-2012, 01:17 PM
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Did the snout get scarred up at all? How long has the new pulley been on there, done any WOT blasts, and could you put a vid up of it at idle?
Old 06-25-2012, 01:36 PM
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Where (and what size) did you get the new keyway? I'm in the same boat. Thanks
Old 06-25-2012, 01:45 PM
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2014 AMG E63S, 2006 XK8 victory edition convertible, 2006 supercharged trailblazer SS, 2001 E430
Originally Posted by chawkins2001
Did the snout get scarred up at all? How long has the new pulley been on there, done any WOT blasts, and could you put a vid up of it at idle?
Snout not scarred. It's been on since last Friday. Haven't done any COMPLETELY wide open blasts but I've got into it pretty good. No vids yet but I will try. I am not proficient at putting them on youtube so you might have to watch them via photobucket but we'll see
Old 06-25-2012, 01:49 PM
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2014 AMG E63S, 2006 XK8 victory edition convertible, 2006 supercharged trailblazer SS, 2001 E430
Originally Posted by 209sl55
Where (and what size) did you get the new keyway? I'm in the same boat. Thanks
Got it from a local machine shop. Not sure of size but had to do some filing.
Old 06-25-2012, 05:23 PM
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Looks good. Do some extended wot runs before you claim victory but I think you got it.
Old 06-25-2012, 05:48 PM
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2014 AMG E63S, 2006 XK8 victory edition convertible, 2006 supercharged trailblazer SS, 2001 E430
Not only did the pulley falling off shear my woodruff, but it also made my sack shrink (lol JK). I'm still a little too nervous yet to do a wot run. Lemme grow some ***** back and I'll do a couple wot runs and let you know if it holds.
Old 06-25-2012, 05:58 PM
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2005 E55 AMG
Originally Posted by nizzle
Not only did the pulley falling off shear my woodruff, but it also made my sack shrink (lol JK). I'm still a little too nervous yet to do a wot run. Lemme grow some ***** back and I'll do a couple wot runs and let you know if it holds.
lmao...if it's going to fall of it's going to do it at the worst time so beat on it close to home and cross your fingers.
Old 06-25-2012, 06:05 PM
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People talk smack about JB Weld, but it's some amazing stuff.
Old 06-25-2012, 06:08 PM
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Originally Posted by GT-ER
lmao...if it's going to fall of it's going to do it at the worst time so beat on it close to home and cross your fingers.
^^^This. U might as well try some WOT close to home just in case.
Old 06-25-2012, 06:10 PM
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No longer stock '06 E55, A3 3.2 Quattro, LRD4 HSE, R107 280SL
Been wondering for those who had this all go bad on them ... Perhaps the end of the crank snout can be machined to a spline / rib profile and a blank ring fitted over it , to shim to oem size/ spec or have a pulley machined to match the spline... Mbe there is a reason this is not done already but just a thot ... Of course means some pretty high tolerance engineering and crank out the motor ...
Old 06-25-2012, 07:09 PM
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Back in school my instructor told my always to use a bit of loc-tite on crank bolts. Come to think about it i dont think i ever have though. Ive never had a single car come back for a loose pulley either.

I think if i ever do take the crank pulley off this car, i think i may put a bit of blue loctite on there just to be on the safe side..
Old 06-25-2012, 07:11 PM
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2014 AMG E63S, 2006 XK8 victory edition convertible, 2006 supercharged trailblazer SS, 2001 E430
If it is not torqued right, loc tite will not help at all. Had 148 ft lbs & loc tite on it when it fell off. The +90 on our crank blots after the 148 ft lbs is everything
Old 06-25-2012, 07:29 PM
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Yeah thats a given. Its a torque-to-yield bolt, without that 90 degrees its going to come loose.

I think your fix will hold up just fine, assuming that is the crank bolt is correctly torqued! Good luck!
Old 06-25-2012, 07:33 PM
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Good work. Good to see it fixed! But wouldn't this cause the crank to be out of balance?
Old 06-25-2012, 08:41 PM
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Originally Posted by benz_addict
Good work. Good to see it fixed! But wouldn't this cause the crank to be out of balance?
No, the amount is so minute and so close to the center it won't matter.

To the OP, good luck. If I was you, I JB weld the bolt in there for good.
Old 06-25-2012, 09:45 PM
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Originally Posted by Denroll
People talk smack about JB Weld, but it's some amazing stuff.
There is actually an FAA approved repair to the Continental TIO 520 series engine cases to stop oil leaks using J.B. Weld. Yup . . . good stuff!
Old 06-25-2012, 11:53 PM
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Originally Posted by WallsReid
I'm in the same boat. Thanks
Sorry to hear that. I am starting to think that this problem is more common then anybody knows. Luckily, GT-ER came up and shared his solution which seems the easiest and best solution. If you need help, just ask and I am sure anyone here will offer whatever they can to help you.
Old 06-26-2012, 12:54 AM
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Originally Posted by jt2ma71
Yeah thats a given. Its a torque-to-yield bolt, without that 90 degrees its going to come loose.

I think your fix will hold up just fine, assuming that is the crank bolt is correctly torqued! Good luck!
thanks

Originally Posted by Forrest Gump 9
No, the amount is so minute and so close to the center it won't matter.

To the OP, good luck. If I was you, I JB weld the bolt in there for good.
If for some reason my fix doen't work, I may consider something along those lines but I didn't want anything to be permanent like that unless necessary. Who knows? I might wanna change pulleys again...

Originally Posted by benz_addict
Good work. Good to see it fixed! But wouldn't this cause the crank to be out of balance?
i guess technically it could be but the car feels fine. I dont notice anything negative

Last edited by nizzle; 06-26-2012 at 12:57 AM.
Old 06-26-2012, 01:44 AM
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Old 06-26-2012, 07:12 AM
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I wonder how long the JB Weld will hold up (long term)?
Old 06-26-2012, 10:45 AM
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Originally Posted by slownrusty
I wonder how long the JB Weld will hold up (long term)?
We have JB weld on a engine block on a excavator at work that has held up since 2003 (I remember putting it on the week after i graduated high school lol) Still hasn't leaked to this day and its had another 2000-2500 hours put on it. That stuff is great!!!
Old 06-26-2012, 12:13 PM
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2014 AMG E63S, 2006 XK8 victory edition convertible, 2006 supercharged trailblazer SS, 2001 E430
I put a mark on the bolt and the pulley so I can check to see if the bolt appears to be backing out/loosening, and it has not budged at all. I have done some good power runs but I am waiting for the weather to clear up in the next day or 2 for a couple WOT runs.


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