Unknown part on Intake Manifold

F

flintcamp

Junior Member
Looking through pictures of Model A engines on the internet some engines have a tube that runs from the intake manifold to the passenger side of the firewall below the gas tank. I was wondering if anyone would have time to tell me what that tube does? Thanks.
 
I use it for my dilithium crystal injector.
I made the Kepler run in 2.3 parsecs
 

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I didn't realize some Model A's had vacuum wipers, thank you all, for the answer. I'll think I'll avoid installing a dilithium crystal injector though, it would seem the car could only be used on sunny days.
 
I had a bolt in my intake. Turns out it was 1/4 tapered pipe thread, and the bolt was just over hand tight. This provided a massive vacuum leak. I ended up replacing the manifold. I was going to thread a tapered pipe plug in to seal it up, however I haven't done that yet.
 

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No problems with vacuum leaks with this manifold. Going back to the correct electric wiper on my 29 tudor.
 

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I went and got the vacuum wiper for my car, rebuilt it, then realized it was going to be such a hassle to install the vacuum lines that a electric would be much easier,
 
Brianfrench65 said:
I had a bolt in my intake. Turns out it was 1/4 tapered pipe thread, and the bolt was just over hand tight. This provided a massive vacuum leak. I ended up replacing the manifold. I was going to thread a tapered pipe plug in to seal it up, however I haven't done that yet.
Click to expand...

What was the purpose of the extra bolt/hole in your manifold?
 
burner31 said:
What was the purpose of the extra bolt/hole in your manifold?
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I have no idea??? It was in there when I bought the car. The vacuum leak did contribute to how the engine ran, so that nugged the price down a bit. I didn't see the bolt until I got the car home, and spent more time studying the car.
 

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Marshall is correct on vacuum wipers but if you ever wanted Nitrous Oxide System who knew Models A come stock with injector port.
 
"...but if you ever wanted Nitrous Oxide System who knew Models A come stock with injector port."
Now, THAT'S funny!!!! I wonder how all those muscle car and engine hop-up TV shows missed demonstrating hooking up a NOS on a Model A??? They did it on every other car made since 1957. You're right - only the Model A has that port already to go. The other cars need a hole drilled. Henry WAS way ahead of his time! :)
Marshall
 
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