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Can someone identify this?


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I have a 1992 mk2f polo 1.3. So this hose connects to the air box, and there is some kind of filter attached to the hose. I can’t see or figure out what it connects to or it’s purpose, all I know is the bottom of the hose is split pretty badly and this entire assembly is currently not doing anything worthwhile. Can someone identify it so I can order a new one? For location reference, see the throttle cable top right.

thanks.

59E72768-CCF5-447A-9963-57094695F738.jpeg

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can direct to a catch can so the engine isnt breathing in the filth , back in the day folk pointed them at the ground 

yeah block the air filter part off and then direct the hose into a catch can ...that way the engine breathes clean air which is best    yeah well vw couldnt just point it at the floor and fo

In theory the vacuum created below the pistons means they move more easily as there is less mass of air moving around as 1&4 descend while 2&3 rise or vice-versa. Whether this makes any p

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The thing that looks like a filter is an oil separator I believe? Part number 052103495. I've often wondered whether mine is doing its job properly as the return pipe into the 'UFO' airbox up top has a permanently oily/damp sheen around it. Top of the throttle body never seems to remain spotless or very long...

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steveo3002

can direct to a catch can so the engine isnt breathing in the filth , back in the day folk pointed them at the ground 

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1 hour ago, steveo3002 said:

can direct to a catch can so the engine isnt breathing in the filth , back in the day folk pointed them at the ground 

 

Interesting - so I guess you'd block up the hole in the air filter housing and point that end of the tube into something/the floor? Is this another one of the environmental considerations VW installed like the carbon canister (i.e. not particularly effective or useful)?

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steveo3002

yeah block the air filter part off and then direct the hose into a catch can ...that way the engine breathes clean air which is best 

 

yeah well vw couldnt just point it at the floor and folk wouldnt empty a catch tank ...worked on a new car but older ones can get oil and crap up into the cleaner , mine was always getting bits in the air cleaner so i altered it

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dvderlm
12 hours ago, zob said:

Is this another one of the environmental considerations VW installed like the carbon canister (i.e. not particularly effective or useful)?

In theory the vacuum created below the pistons means they move more easily as there is less mass of air moving around as 1&4 descend while 2&3 rise or vice-versa.

Whether this makes any practical difference at normal engine speeds is hard to measure.

 

But sucking oily fumes or perishing rubber bits into intake is not great either.

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GatisGirdenis
2 hours ago, dvderlm said:

In theory the vacuum created below the pistons means they move more easily as there is less mass of air moving around as 1&4 descend while 2&3 rise or vice-versa.

Whether this makes any practical difference at normal engine speeds is hard to measure.

 

But sucking oily fumes or perishing rubber bits into intake is not great either.

I have heard of some racecars having seperate vacuum pumps going to the crankcase to create vacuum there and the increase was measurable on those, but IIRC they were 500+ hp engines.

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