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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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66,891 Posts
What car, make, model, year, engine ?

Your short video looks like an old "smog pump".
 

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White Diamond '03 DHS (with DTS floor shift)
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86,242 Posts
That's gonna be a tough find. You might have to repair (weld) the old one.
 

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1984 Eldorado Biarritz
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1,154 Posts
Vacuum pump. They are available rebuilt and occasionally new. The bracket can be donated by any 82-84 Cadillac with a 4100 engine. The 1985 Eldo/Seville/Fleetwood is a source too, but it’s slightly different and you’ll need to use a 1985 vacuum pump belt.

They’re bolted into the head and very difficult to remove.
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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66,891 Posts
What did a vacuum pump do? Emissions or engine controls or heating/cooling stuff?

I removed the belt-driven "smog pump" from a 1967 Cougar 289, sealed off the piping to the heads, and never looked back. Nary a problem, and drove that car to 160,000 without a problem.
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
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86,242 Posts
The 4.1 was so under powered that it had a hard time providing enough vacuum to run all the vacuum operated systems and needed an assist.
 

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1984 Eldorado Biarritz
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1,154 Posts
Yes! The switch to 2bbl TBI in 1980 robbed the engine of a lot of power-so more time at wider throttle openings. 1980 Eldos and Sevilles were the first Cadillacs with the system and had issues with pinging and HVAC due to the lack of vacuum. They added a pump in 1981 to mitigate that. I think the pump was adapted from the diesels which looked remarkably similar with the exception of being gear driven. The downsized cars actually used an electric vacuum pump and kept it until they went to 4.5 liter displacement.
 
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