From the Bentley manual, page 15.17:
"Cylinder heads with cracks between valve seats or between a valve seat
and spark plug thread can be used again without reducing service life
provided that the cracks are small and not more than 0.5mm (0.019 in.)
wide or that only first coil of plug thread is cracked."

On Tue, Jun 10, 2008 at 04:40:47PM -0700, shawn clark wrote:

> I just pulled the heads off of my 84 westy (first time to pull heads off any car)
>   I did it with the engine still in,
>   the piston sleeves would not come off so i pulled them out, 2 with each head.
>   Once i beat the sleeves off with a wooden block and a hammer, i noticed a hair line cracks between all 4 sets of valves.
>
>   sooooo... the question is,
>   where do i get new or rebuilt heads for the lowest price.
>   cause this sucks and i don't have much money.
>   let me know,
>
>   thanks,
>   shawn