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Overheating caused by loose thermostat butterfly [message #175146] Sat, 30 June 2012 15:21 Go to previous message
Bill Freeman is currently offline  Bill Freeman   United States
Messages: 122
Registered: March 2004
Location: Colerain, NC
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Senior Member
Just wanted to share an anecdote about overheating. Several years ago I bought a used 69 Toronado that had chronic overheating problems. It had a relatively new looking thermostat in it and the thermostat passed the boiling water on the stove test. I left the thermostat out and it still overheated. Eventually discovered the butterfly from some previous thermostat had broken off and was stuck in a water passage in the intake manifold. After I fished the butterfly out of the manifold it stopped overheating. Murphy's law strikes again.

Bill Freeman
78 Royale 73 Sequoia
Colerain, North Carolina

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