On Tue, 18 Nov 2003, Mike Collum wrote:

> I believe you have a leak at one of the heads.  Possibly a deep crack
> between the valve seats that only opens under great pressure, or an
> upper gasket and O-ring that leaks under great pressure.
>

It seems like the obvious next step would be a test for exhaust gasses in
the cooling system.  If they aren't present, then it's not the heads...

David Brodbeck, N8SRE
'82 Diesel Westfalia
'94 Honda Civic Si -- For Sale
'86 Volvo 240DL wagon