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Question about heat rise valve in manifold?

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02-06-2013, 02:23 PM	#1
earnhardtgm3 Registered User Join Date: Oct 2012 Location: Camaro Country,GA Posts: 30	Question about heat rise valve in manifold? Truck is a 77 with a stock 350 with all emissions still intact and the sensor broke off in thermostat that goes to the vacuum canister for the valve to open/close the valve for the heat riser to work.If no vacuum is the valve open or closed?Or do I need to put vacuum on it all the time till I can get headers installed. __________________ 1977 Chevrolet Scottsdale: 1979 Camaro Z2/8 http://www.nastyz28.com/forum/showthread.php?t=129623

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