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Old 04-10-2011, 01:23 PM
werminghausen werminghausen is offline
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Join Date: May 2006
Location: Boston
Posts: 1,410
1971 300SEL 3.5: what is the check valve next to the cold start injector?

I am about to install the cold start injector: I could open it up yesterday after I have put it in carb cleaner for a week.
So now I see this check valve and the valve seat is hanging down low leaving a gap and air can enter. There seems to be a spring underneath but it is not strong enough to close the valve seat.
Does this valve supposed to be closed?
Who has advise here?
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