If the problem is the seal around the valve stem, the symptom would be oil
consumption.  Not a big problem to drive as long as you watch the oil level.

If the problem is the valve itself as indicated by a compression or leak
down test, the symptom would be reduced power and irregular cranking
speed.  No immediate problem to drive a reasonable distance.

You didn't say if driving it home was 20 miles or 2000 miles.   :-)

Larry A.

On Fri, Jan 30, 2015 at 9:53 AM, Jamie Fitterer <fittdog8848@hotmail.com>
wrote:

> A friend is looking at purchasing a van that is in really good condition
> but the mechanic reports the engine has a leaky valve seal and it would be
> around 500 - 800 dollars for the fix.  I don't have much more information
> on that and apologize for that, but it is what it is.
>
> My question is, does anyone know what valve seal this may be?  What are
> some repercussions of driving it to get it home?
>
> Appreciate your time,
>
>
>