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  #1  
Old 04-08-2008, 07:36 PM
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Air Cleaner Part Question

On the metal cover of the air filter of my 81 240D there is a hole. I have seen a few pictures like the one below with some plastic line coming off the top of the cover, mine doesn't have one. Should I have one? What is it? Part#?


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Old 04-08-2008, 08:15 PM
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I think that goes to the vac pump, I would also think you need it. Have you had the car long?
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Old 04-08-2008, 08:23 PM
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isnt the line supposed to go to the top of the valve cover blowby valve?
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Old 04-08-2008, 08:37 PM
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Quote:
Originally Posted by toomany MBZ View Post
I think that goes to the vac pump, I would also think you need it.
Agree, that's correct for a 240. On a 300 there would be a breather tube to the valve cover.
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Old 04-08-2008, 08:50 PM
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Originally Posted by toomany MBZ View Post
I think that goes to the vac pump, I would also think you need it. Have you had the car long?
Well, maybe, some early versions did not have that, a hose went from the cam cover to just under the air cleaner assembly.
BUT, if yours has a hole... pic?
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Old 04-08-2008, 08:57 PM
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Quote:
Originally Posted by toomany MBZ View Post
Well, maybe, some early versions did not have that, a hose went from the cam cover to just under the air cleaner assembly.
BUT, if yours has a hole... pic?
My cover has a hole in it (I will post a picture tomorrow), what does the tube do?

Do you know what the part # is?

I just started driving it everyday now, it was gifted to my mom about a year ago and given to me.
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Old 04-08-2008, 09:50 PM
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I used to have an '81 240D w/ manual trans and the breather went from the valve cover to the intake manifold. It didnt have a hole on the cover. I'm betting that a previous owner swapped an air cleaner cover from a turbo model. I would plug the hole if you already have the breather tube going from the valve cover to the intake.
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Old 04-08-2008, 11:32 PM
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Quote:
Originally Posted by coolerelmo View Post
My cover has a hole in it (I will post a picture tomorrow), what does the tube do?

Do you know what the part # is?

I just started driving it everyday now, it was gifted to my mom about a year ago and given to me.
Click on the buy parts button at the top of the page there is a phone number, call Phil.
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Last edited by toomany MBZ; 04-08-2008 at 11:33 PM. Reason: more info
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Old 04-08-2008, 11:48 PM
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That's the vent line for the early vacuum pumps. It's found on both 616 and 617 engines with the early versions of the pump. Perhaps you have had a later model vacuum pump installed.
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Old 04-09-2008, 12:30 AM
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I think '80 was the last year of the vent tube from the vac pump to the air cleaner cover. Both my 80's had the vent tube to the air cleaner.





The engine in China now came from an '81 and doesn't have the vent tube.



All 3 have the line from the valve cover to the manifold under the air cleaner....
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Old 04-09-2008, 04:59 PM
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[quote=JimmyL;1818978]I think '80 was the last year of the vent tube from the vac pump to the air cleaner cover. Both my 80's had the vent tube to the air cleaner.



Your right. I took a look at the vac pump and there is no connections missing. And I looked at the air cleaner cover and it is closed off. The top of the rubber plug is missing of it.
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