On Tue, 30 Dec 2003, MacLachlan, Bill wrote:

> Start the cold engine.  Let it run. As motor warms up, feel the radiator
> surface. If its all stone cold, the thermostat ain't opened yet. Once
> the thermostat opens and the radiator starts to warm up,  it should warm
> up evenly all over. Clogged patches in the radiator will stay cold while
> everything else warms up. If you've got an unevenly heating radiator,
> you've got a clogged one.

This is a two-pass radiator, so I think the bottom will normally be warmer
than the top, right?  Other than that you're right.

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