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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

What is this???

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Old 07-09-2009, 04:08 PM   #1
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What is this???

It says "no oiling" on it. No clue what it is. I've been looking at it but I still have no clue...any idea? Its on the opposite side from the alternator. It has its own belt.

Thanks
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Old 07-09-2009, 04:23 PM   #2
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I havent seen one of those for years ...
thats the air pump .



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Old 07-09-2009, 05:39 PM   #3
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had one on my ford, but the tubes were cut, i think it would make for a good compressor eh?? dunno if it can compress air to any usable amount of psi tho, been woundering that for awhile
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Old 07-09-2009, 05:47 PM   #4
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Air pump for the Air Injection system. Its part of emissions. Certain years used pumps instead of the venturi effect in the manifold. Basically it pumps air into the exhaust to help with the cat.
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Old 07-09-2009, 05:50 PM   #5
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I've been wondering abotu this on my 79 for quite a while. Looks like an unneccesary draw on the motor. I'm gonna remove the belt and see if she still runs alright.
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Old 07-09-2009, 06:22 PM   #6
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it should run fine if not a bit better less drag on the motor
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Old 07-09-2009, 09:48 PM   #7
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yep. it's the smog pump, a.k.a. air pump. you've probably got a few other hoses connected to that too, as well as some curious things like the 'diverter' valve....
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Old 07-10-2009, 12:40 AM   #8
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A good working smog pump has very little drag. It's not some horrible power-robbing emissions device; it's just clutter-inducing device that happens to clean up the air a little.

And no, they do not typically work well as compressors. I have one off of some '80s Toyota pickup and IIRC, the vanes are made from some kind of resin.
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Old 07-14-2009, 09:55 AM   #9
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I used an A/C compressor for a time. Installed a pressure switch to the magnetic clutch and a storage tank...worked like a champ for impact wrenches, airing tires, all kinds of handy stuff!!
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