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Quick question on replacing the thermostat on my '74 S2:

Do I need to drain some coolant before removing the housing or can I just swap it, deal with a little coolant overflow and then bleed/top off the system?
 

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If you don't drain beforehand it certainly will drain out as you remove the thermostat cover. It tends to dump on the distributor.
Yes, bleed for sure afterward with the screw on the intake manifold.
ANdrew
 
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