[DeTomaso] DeTomaso Digest, Vol 85, Issue 20-Pressure cap

[JDeRyke at aol.com]

Fluidyne says their all-welded aluminum rads are pressure tested up to 24 
psi before shipment, but.... what happens is the core tubes 'balloon' which 
crushes the finning and restricts air flow, so over-pressure can reduce the 
better cooling you paid so much to get. It may not cause a leak in the rad 
but the damage is permanent and not repairable. It takes really close 
inspection to see ballooned tubes; NASCAR runners sometimes gets this in their 
hand-built rads when a head gasket blows at high temp/rpms and the cap doesn't 
vent the combustion overpressure fast enough. FWIW- J DeRyke