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Old 02-23-2004, 12:19 PM
Jim Anderson Jim Anderson is offline
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Join Date: Jun 2000
Location: Saugus, CA USA
Posts: 2,023
I had a metal radiator do that, and heard of it happening to others too. What happened was the thermostat fails closed and the cooling system pressure climbs faster than the pressure cap can vent it, and of course the engine temperature climbs pretty fast too. It turns out the lowest pressure component in the cooling system is the radiator, I thought it would have been a hose.

I think your mechanic may or may not be right, but I'm suggesting you check/change your thermostat anyway.

My cost was just a thermostat, metal radiators are repairable.

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