On Mon, 16 Oct 1995, John Foster wrote:

> Apparently lifter noise is common and likely harmless when vans sit a long
> time...see Technical Bulletin 15 87-02.  I have had this symptom on my 86
> when it sits a week or so.  Normally it goes away quickly.  Reving up the
> engine several times may help.

I let the 81 idle until it stops.  That "clank" is none too good for the 
cam, etc.  But you're right, it will go away eventually unless the 
lifter's collapsed, in which case it needs to be pulled and replaced per 
Bentley.

Jack