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1973 450SL, (Previous 2008 ML350,2002 E320 Wagon, 2000 SLK230)
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54 Posts
Discussion Starter #1
Just received replacement AAV and will be replacing in next couple days. On the bulb side with the gasket do I need to apply a little gasket cement on each side before inserting and tightening?

I ordered a repacement air intake hose (the Y hose) as the original rubber was a little on the "hard" side. I may wait until this arrives before I replace the AAV so I don't have to take the air cleaner off twice.
 

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'79 450SL, '04 CLK200 convertible; former A124, W210, A209.
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2,116 Posts
No need for cement, just sand off the leftovers so that you have nice smooth surface. I'd wait until the hose arrives and replace in one sweep 馃憤

Are you getting a new AAV or is that remanufactured / reconditioned?
 

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1973 450SL, (Previous 2008 ML350,2002 E320 Wagon, 2000 SLK230)
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54 Posts
Discussion Starter #3
Thanks for the reply - it is a reconditioned from a place in California. Comes with a replacement guarantee as well as the gasket. They seemed to have positive reviews so I thought I'd give them a shot.

I'll wait for the hose as you said - do in one shot.
 

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'79 450SL, '04 CLK200 convertible; former A124, W210, A209.
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2,116 Posts
Very good, I'm sure it will work just fine and last a long time 馃憣
 

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'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,555 Posts
Didn't know anyone was refurbing AVs - who is it?

The flange surfaces are sometimes a bit rough. especially engine side. It does no harm to add a thin smear of grey Permatex or similar high temp sealant on each surface. I have always done this with my home-made gaskets.
 

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1973 450SL, (Previous 2008 ML350,2002 E320 Wagon, 2000 SLK230)
Joined
54 Posts
Discussion Starter #6
OK - so far so good. Replacement in, no buzzsaw operation at high idle - at 1900-2000RPM. Prior operation, buzzsaw at 1900 RPM, then work way down to 600 rpm. Now starts at 1000 -1100 rpm, then drops to 750. Also seems to be a different car - operation is almost pleasant to drive.
 

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'79 450SL, '04 CLK200 convertible; former A124, W210, A209.
Joined
2,116 Posts
Good job, the revs seem spot on - at least my 1979 450SL has similar specs when cold. 馃憤
 
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