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2004 Sienna CE 97k miles
105 Posts
Discussion Starter · #1 ·
Flushing the cooling system, decided to renew the water outlet housing and thermostat along the way. Got this Aisin unit from RA, seems genuine, has the Tama marking, box says made in Japan. Tested it in a pot of hot water together with the old, it doesn't open even at 205 deg. while the old does. Bad unit?
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