Alright yes I know, this's been discussed many times before, but this is a bit of venting for me. Nonetheless, my stupid solution works.

The farthest air filter housing rubber buffer from the engine absorbs the bulk of the vibration. In other words, out of the three housing buffers, the one closest to the passenger side moves the most. In other other words, that buffer has the greatest range of motion along the y axis.

So instead of using a rubber buffer there, I just use a folded paper towel...folded over again and again until it's a neat square that's approximately 125% of the height of a rubber buffer. That son of a ***** absorbs practically all excess virbrations and renders the air filter housing practically silent. The mass of the housing is enough to hold the folded paper towel in place, even at highway speeds.

I used my hillbilly method for a year or so, but didn't like that it wasn't "proper". So I bought 3 new housing buffets/mounts. Installed em with 2 m6 hex nuts per buffer. Started up the car... housing sounded like a machine gun.

Yeah, my motor mounts are probably shot. But still, paper towel method... it works regardless. Ugh I spent all that time installing new crap and my stupid paper towel fix worked better.

Do you have the rubber buffer on the large hole that fits inside the air box and sits on the throttle housing ?

Can you take a picture of the towel installed. I would like a visual just to make sure I got it right before I give it a try.........

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2012 Mercedes ML350 Bluetec 91K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 231K (mine)
1998 Volvo S70 T5 Turbo 196K (kids)
1994 Ford F150 4WD 249K (firewood hauler)
1983 Mercedes 300D 376K (diesel commuter)

Putting 6 inch section of heater hose between the intake manifold and the outside of the Air Filter Housing also works. I cannot remember the hose size but it is in the repair links sections. I did it and I worked it was either 1/2" or 3/4" heater hose but check to be sure.

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84 300D, 82 Volvo 244Gl Diesel

Here're the pics.

Here a pic showing the approximate locations of the buffers/paper towel wad.



And a close-up of the paper towel.



aaaand a gratuitous glamour shot.



Note: Place the crease of the paper towel toward the front of the engine. This way, air more easily passes over the paper towel, keeping it in place. Also, my estimate of making the paper towel stack 125% the height of a rubber washer is likely incorrect; over time, vibration will reduce the height of the paper towels; 200% is probably a more accurate number; basically, you just want the paper towel stack to be the same height as the rubber buffers.

hmm.. seems like the webpage doesnt like my pictures. Here's the link to the gallery: http://imgur.com/a/ixJJ8

Whatever works. Sounds like a softer rubber mount there would help. McMaster-Carr sells things like that. I tried the "heater hose stuffed between air cleaner and valve cover" fix in my 1984 300D, but the shaking still ticked me off. Instead, I installed a 1985 CA frame-mounted air filter. I knew this would work because in my 1985 CA 300D I had mod'ed it to match an earlier engine I swapped in. See my post. Mainly for CA owners. I see 1985's in the JY once in a while. No, I don't pay $50 for the factory filter. With 32 yr old cars, you must be resourceful.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans

I made new mounts using #8 screws, wing nuts, a hole saw, and a hockey puck.

Hole saw in a drill:


Hockey puck:


Drilled:


Spacer:

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1985 Mercedes 300D turbo, w123, 722.3, 315K miles
1987 Mazda B2200, Dana 44, 283 v8, th350, np203

Do a couple of valve adjustments, about 200+ miles apart, and see how much that smoothes the vibration. I'll bet you will be surprised!

It made a significant difference on mine.

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Sam

84 300SD 350K+ miles ( Blue Belle )