Removing a stuck venturi

Tom Wesenberg

Tom Wesenberg

Well-known member
I was working on a carb the other day and the top come off easily, but the venturi was stuck tight in the bottom. I used a propane torch to heat the cast iron around the venturi for about ten minutes, then ran cold water through the center of the venturi to cool it. The venturi slipped right out.

I'd bet dry ice on the venturi would do the same, but I don't know where to buy dry ice locally.
 
Glenn C. said:
Barbeque for 1/2hr works great also on medium heat.
Click to expand...

The venturi was in great shape, and I wanted to remove it with no damage to it. I don't think the venturi would stand up to a barbeque. Holding the flame on the cast iron near the top of the bottom carb casting for 10 minutes, then cooling the venturi by running cold water through it let the venturi come out in perfect condition.

When a venturi breaks while seperating the top of the carb from the bottom I have tried a propane torch on the broken parts of the venturi. Soon after the flame hits the pot metal it starts to splatter and spit out parts of the mixture, (whatever goes into making pot metal).
 
Barbecue will definitely get it out as about a tablespoon of liquid...
The Cold tech is interesting and neat; I wonder if it could be done using the freezing sprays sold for use by plumbers?? That might give sufficient chilling capacity for small jobs like this in a form that could be kept handy on a shelf.
 
Tom, around here a lot of our grocery stores carry dry ice in the frozen section by the pound. It will be in a small freezer that is easy to overlook. I use it at Halloween parties to make a smoking punch that everybody just loves. Frozen carbon dioxide cools great and is non-toxic so no ice needed.
 
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