Anyone know what this is?
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
Valve contains a flapper that is notorious for getting stuck in the open position.
1965/67 F100/350 352 / 1973/74 F100 360.
Posting Guru
Joined: Jan 2000
Posts: 2,281
Likes: 4
From: colbert washington
Put it back in and don't worry about it as long as it is in the stuck open position. You already have a very restrictive exhaust system with the old cast iron exhaust manifolds on that motor. It will not affect anything. If you live in cold weather it may take slightly longer to warm up when first started.
Believe Nothing
Joined: Jun 2004
Posts: 7,514
Likes: 398
From: W. Central FL.
Yeah, put it back in. Someone may want to free it up during a restoration someday. If you have it in your hand, go ahead, spend the time to free it and you can hear it rattle as it works. OTOH, if all the parts are there, put it FS, someone will buy it.
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