If you drove it long enough to wear the end of the crankshaft just cross your fingers and hope it works. If it starts throwing belts you'll need a rebuilt or used motor! Hope the mechanic that tried to do you the cheapest repair to get you back on the road used a good loctite on the crankshaft bolt! I'd check it a few times to make sure it is not coming loose over the next several weeks!

Something wrong here. Excess wear not allowing new pulley to fit is bad. A wobble induces vibration plus excess wear on belt.

If engine is low revving eg under 2000 rpms we could possibly ignore it.

Over time vibration and out of balance forces acting onus ley and shat will induce bolt to slacken. Result ..lost pulley ! Possible crank too badly damaged to use?

We need to ideally have crank ground and sleeved to fit pulley .

In real world often too expensive and time consuming and new crank would be solution.

As costs versus time etc play a key role in our lives. We may decide we don't want to follow correct route and try to apply a 'fix' to use car as is.

Here we need to assess crank shaft damage ..if it's clearly too badly worn etc to get pulley to fit securely and running in line..it's then just a case of when will it fail?

If shaft is looking reasonable.. We can measure it and see if crank pulley can have thin sleeve fitted of other material to stabilise pulley when bolted on.

Pulley ought not to run out more than a half millimetre. Even this stresses it. Every half millimetre further out of line will increase side mass loads and thus stress factors increase substantially with possible failure mode being reached.

Your choice but runout can be critical on crank pulley depending on engine and speeds run at.

We may want to try shimming.

A small(er) expense waiting to become a big one - did you get a second opinion or did this mechanic warn you that this is not a fix it right, just a fix it right now? If you need a little time to get the money up for the real fix, will the car last that long? I say it's time to load up a credit card or something.

Never install a used crankshaft dampener / pulley.

That is incorrect. A crankshaft is made of the hardest steel. It will not wear the face unevenly. The pulley must be bent or the face of it where it mounts onto the crankshaft is not flat.

if it wobbles, then its loose, itll never work, itll wear or even break the end of the crank off. sounds to me like he installed a used one that was hit instead.

maybe stabilisers ?

Hi,

Recently, I had my crank pulley come loose. I had a new belt and crank pulley replaced, but it turns out that there was some wear on the crankshaft? So the mechanic said that it doesn't align perfectly and that there will be a slight wobble.

Is this a major problem I should worry about? Is there any way to fix the wobble? Thank you.