sheared woodruff key on crank pulley

[Joshua Van Tol]

The woodruff key is primarily there to locate the timing gear. If the 
key still fits tightly in the keyway, or can be made to do so by 
welding, or metal loaded epoxy, then you should be okay. You'll need to 
make sure to you torque the bolt correctly.

In any case, it can't hurt to try. The worst that could happen is that 
you'll bend some valves and have to replace the crank, but if you're 
taking the engine apart anyhow, you might as well do a complete 
rebuild, so there's really no loss.
On Dec 30, 2003, at 8:36 PM, AV8oR wrote:

> Hi guys!
>
> Patient: 1987 4KQ w/ 152K on it.
> Project: Timing Belt (now Timing Belt from Hell)
>
> Looking at the harmonic balancer I noticed that the driving belt
> sprocket (timing belt) had a sheared woodruff key.
> After further inspection of the crank, I also noticed that its notch 
> was
> damaged (about a 1/4" of the left wall is chipped away)
> (the previous owner explained, " it has intermittent compression - it
> doesn't run" )
> The harmonic balancer was definitely loose due to an improperly torqued
> CRANK BOLT!
>
> Today I found another Driving Belt Sprocket.
>
> My question is - can I just use the new Driving Belt Sprocket w/ the
> intact Woodruff Key on the slightly damaged crank or do I have to get
> a new crank? Are there any alternatives (like building up the wall with
> J B Weld or a real weld)?
>
> [ All this after I broke the Idler Pulley Bolt off and I had to remove
> the oil pump, pan and sub frame to get to it.
> ... oooh I had to reinstall the Cam and Crank Seal twice because the
> casings were bent to hell and damaged from
> the previous installation - SIGH ]
>
> Any pointers and recommendations are greatly appreciated!
> TIA & a Happy New Year!
>
> Zaf
>
> PS: Can't believe that I spent Christmas Eve and Day Working on this
> thing.
>         One less 4KQ in the Junkyard!
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