Crankshaft pulley bolt

[nlan]

Does anyone know if this bolt is normal or reverse-thread?

Seems pretty tight, my impact wrench won't undo it!
Any idea of it's tightening torque too?

Thanks
Nikos

[bob-in-dav]

Re: Crankshaft pulley bolt

Hi Nikos - it's a normal right hand thread and very tight!!! My impact wrench wouldn't do either of the 2 I've had to undo recently - used a good long wrench on extensions through the spring and out through the wheel arch (engine in car).

Have fun - Bob

[nlan]

Re: Crankshaft pulley bolt

Hi Bob,

How did you manage to hold the crankshaft in place while turning?

[bob-in-dav]

Re: Crankshaft pulley bolt

With the sump off you can lock the crank with something against a crank web - see FQ101 600cc engine rebuild.

I manages to get a socket set extension through one of the pulley holes and lock against a rib on the casing behind it - risky I know but it worked both times I used this method.

The trick is to get whatever you lock the pulley with to stay in place so you can get both hands on your long wrench.

Hope that makes sense!

Bob

[tolsen]

Re: Crankshaft pulley bolt

Park in 2nd gear and pull handbrake on as hard as you can, then crack crank pulley bolt loose the usual manual way. Also possible with better quality rattle gun such as Ingersoll Rand or better. Note that you really need 3/8" hoses or larger to get reasonable power out of any rattle gun. 1/4" hoses are just too small and can't deliver the amount of compressed air required.

[smartsparky]

Re: Crankshaft pulley bolt

If you look under the bell housing in the gap next to the sump, you will see a black cover cap. It's a tight sqeeze but if you peel this off you can get to the clutch mounting bolts (need to rotate the engine). If you fit a correctly sized hex socket over one of the bolts, this will stop the crank rotating. You'll then be able to break off the pulley bolt.

One of the reasons why this bolt is held on so tight is that it holds the oil pump sprocket so that it rotates without slipping around the crank shaft. You will see that only the timing chain sprocket is held by the 'tooth' on the crank.

[nlan]

Re: Crankshaft pulley bolt

Thanks for the ideas guys! If and when I manage to break it loose & check the oil pump/timing parts, do you know the torque I need to tighten that bolt to?

[bob-in-dav]

Re: Crankshaft pulley bolt

Belt pulley bolt into crankshaft All 450 & 452 + CDI 140Nm + 90°

[nlan]

Re: Crankshaft pulley bolt

Great help, thank you

[nlan]

Re: Crankshaft pulley bolt

Can the pulley bolt be reused?