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Crank Pulley wobble after removing/reinstalling idler pulley

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Crank Pulley wobble after removing/reinstalling idler pulley

 
Old 02-08-2019, 09:33 PM
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Crank Pulley wobble after removing/reinstalling idler pulley

Hey everyone,

I just finished replacing my alternator this evening and was happy to be successful. In order to get it out and in I removed the supercharger idler pulley for access.

However - I now see substantial wobble in my crank pulley at idle that was not present before. I was panicking that it was giving up on me but am now hopeful I just installed the pulleys incorrectly or didnít torque correctly.

Any ideas?

Edit: Car is bone stock with 75k miles.

Last edited by Jake528; 02-08-2019 at 09:59 PM.
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Old 02-08-2019, 11:29 PM
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Take and post a video. It may be on its way out. Might be a good idea to replace it before the ring comes off.
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Old 02-08-2019, 11:40 PM
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Try looking at it side on.
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Old 02-08-2019, 11:44 PM
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Originally Posted by supreame View Post
Try looking at it side on.
How do you mean?
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Old 02-09-2019, 12:23 AM
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Originally Posted by Jake528 View Post


How do you mean?
If you look at it from the side, so a lateral view, does it still look like the face of the pulley is wobbling? I have seen them look like they are wobbling from the front, but from the side it is spinning true.


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Old 02-09-2019, 12:28 AM
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Originally Posted by supreame View Post
If you look at it from the side, so a lateral view, does it still look like the face of the pulley is wobbling? I have seen them look like they are wobbling from the front, but from the side it is spinning true.

Oh, itís a substantial amount of wobble. You can see it from any angle. It goes away at about 1k rpm though.
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Old 02-09-2019, 07:53 AM
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Here is a video of mine after I did a pulley install. Some wobble is normal. I've seen it other type motors as well.
https://youtu.be/qSCQAu9j05s
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Old 02-09-2019, 10:30 AM
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The wobble has to be present before. There is no way removing / installing idlers pulleys will cause the crank pulley to wobble.
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Old 02-09-2019, 01:19 PM
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Originally Posted by shardul View Post
The wobble has to be present before. There is no way removing / installing idlers pulleys will cause the crank pulley to wobble.
Any ideas on sourcing an OEM that isnít expensive or should I take the opportunity to go with a different size?
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Old 02-09-2019, 01:32 PM
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Take it to a reputable MB dealer and let them service it. Trust me not something you want to skimp on. It requires a tool to hold the pulley for removal and install and an insane amount of torque on the bolt for a successful install.
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Old 02-09-2019, 01:46 PM
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Originally Posted by [email protected] View Post
Take it to a reputable MB dealer and let them service it. Trust me not something you want to skimp on. It requires a tool to hold the pulley for removal and install and an insane amount of torque on the bolt for a successful install.
Pretty sure my Dad and I could handle it but I am currently waiting on a quote to hear how much they want to rail me for it.
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Old 02-09-2019, 03:00 PM
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Expect a 1000 dollar bill lol
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Old 02-09-2019, 07:24 PM
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LOL
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Old 02-09-2019, 07:57 PM
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Originally Posted by oneslow55 View Post
LOL
Why are you always trolling threads? Lol
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Old 02-11-2019, 12:31 PM
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Dealer wants $250 in labor, plus $580 for the pulley. For that kind of labor I think itís probably worth it to let them handle it. Waiting to hear back from an independent shop as well but doubt they would be any less at that rate.
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Old 02-11-2019, 07:02 PM
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Not trolling ,just funny to read people posts that make no sense and rather tackle things that needs special attention to do it correctly. You been only on this board for few months watch in 1 year you'll be posting lol to on many things said.Change you sig with your mustang unless you don't own a amg.
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Old 02-11-2019, 07:21 PM
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Originally Posted by oneslow55 View Post
Not trolling ,just funny to read people posts that make no sense and rather tackle things that needs special attention to do it correctly. You been only on this board for few months watch in 1 year you'll be posting lol to on many things said.Change you sig with your mustang unless you don't own a amg.
I have an 05 E55, I didnít change my sig because Iím mainly on mobile and never noticed. I made a thread looking into some insight on a topic that isnít well documented like a lot of others and was looking for input. The forum is full of people with different backgrounds and skill levels. Nobody appreciates your negativity.
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Old 02-11-2019, 07:32 PM
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Replacing a crank pulley on a E55 shouldn't be something intimidating to anyone with some mechanical skill.... just because it's a Mercedes doesn't mean it requires a high level of knowledge. I made a tool to hold the pulley and replaced it without any issues. It really does make this forum look bad when people come here looking for help just to be ridiculed...
if you do decide to do it yourself send me a PM I can help and send you the tool I made or show you how to make it it's easy. I used a piece of pipe that was small enough to match the holes on the pulley. Weld three bolts that fit in the holes then a long three foot piece of pipe as the handle.
You can find the tq procedure on the forums. I believe it's 150ft/lbs+ 90 degrees. Use a OEM bolt not one from arp.... It's going to take a five ft breaker bar and two people to get it done. I removed my entire front end. Check our my threads I posted a thread on with pictures when I did it. Best of luck.
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Old 02-11-2019, 07:55 PM
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Originally Posted by [email protected] View Post
Replacing a crank pulley on a E55 shouldn't be something intimidating to anyone with some mechanical skill.... just because it's a Mercedes doesn't mean it requires a high level of knowledge. I made a tool to hold the pulley and replaced it without any issues. It really does make this forum look bad when people come here looking for help just to be ridiculed...
if you do decide to do it yourself send me a PM I can help and send you the tool I made or show you how to make it it's easy. I used a piece of pipe that was small enough to match the holes on the pulley. Weld three bolts that fit in the holes then a long three foot piece of pipe as the handle.
You can find the tq procedure on the forums. I believe it's 150ft/lbs+ 90 degrees. Use a OEM bolt not one from arp.... It's going to take a five ft breaker bar and two people to get it done. I removed my entire front end. Check our my threads I posted a thread on with pictures when I did it. Best of luck.
Thanks, I appreciate it. I was debating doing it myself and I know I could, but my wife and I are expecting soon and pretty busy so it just doesnít make a whole lot of sense for me to spend a couple nights during the week when I can afford the $250 in labor. I would have liked to do it but for that much Iím okay with taking it in. Thanks for the support man.

Edit: Just to clarify I didnít ever actually ask for DIY help I was looking for some thoughts on the pulley itself and if it was, indeed, going bad. Thanks for the help guys.

Last edited by Jake528; 02-11-2019 at 08:02 PM.
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Old 02-11-2019, 08:02 PM
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I would do the same... I did it myself because I got the car from a friend who had a aftermarket pulley installed and they failed to do it correctly twice almost ruining the crank snout... I was fortunate to save the motor. Congrats on the new addition!!!
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Old 02-12-2019, 09:06 AM
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95% of members are clueless and never had a modded car till now.. The old members like me and others don't post much anymore.
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Old 02-12-2019, 09:07 AM
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To the other guy just have a the dealer install it and they will be liable if something goes wrong..Installing cranks on these cars are Tricky and leave it a pro.
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