I have had leaks at higher pressures that never showed at lower.

I have had leaks that showed at lower temps that didn�t show at higher
temps. (almost always at hose connection points)

But I have never had a leak in a core that showed at a lower pressure and
disappeared with higher pressure.  Usually become very obvious at higher
pressure.  Sometimes even spectacularly obvious.
jimt

On 9/20/05 3:06 PM, "Jeffrey Schwaia" <jeff@VANAGONPARTS.COM> wrote:

> I'd try a new shop.  I've replaced dozens of these suckers over the years
> and never had a problem with leaking at different pressure levels.  Sounds
> like voodoo science...
> 
> BTW: When you replace the core, you should also replace the valve & o-ring.
> 
> Cheers,
> 
> Jeff
> www.vanagonparts.com