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#1
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harmonics on the air cleaner
Hello,
In messing with my idle and rack dampener, I found that there were some idle speeds and situations where the air cleaner will vibrate so violently that it will hit the side of the valve cover. I have a pretty new air cleaner mount, and all the rubber connectors are brand new... Has anyone else experienced this? The clanging noise of the air cleaner hitting the valvecover? The worst part of it is that the best perceived idle is at a speed/setting where the air cleaner will sometimes do this. The weird part is that the air cleaner will not jst do this naturally, it takes some change in load, like the AC coming on or shifting from drive to neutral for it to happen... And then if you make a slight change, like goose the throttle or something, it will stop. Anyone experience this?
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Current Diesels: 1981 240D (73K) 1982 300CD (169k) 1985 190D (169k) 1991 350SD (113k) 1991 350SD (206k) 1991 300D (228k) 1993 300SD (291k) 1993 300D 2.5T (338k) 1996 Dodge Ram CTD (442k) 1996 Dodge Ram CTD (265k) Past Diesels: 1983 300D (228K) 1985 300D (233K) |
#2
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Yes, and that's the main reason why the air cleaner mounts and brackets fail so often, they're violently shaken to death!
Here's the fix. http://www.peachparts.com/shopforum/showpost.php?p=622208&postcount=8 Also, read this. The late Marshall Booth provided this quote from the late Randy Durrance on another MB forum some years ago. Quote:
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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate Sooner or later every car falls apart, ours does it later! -German Narrator in a MB Promotion Film about the then brand new W123. |
#3
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I had done the same thing with foam. This is a better idea. Thanks!
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Current Diesels: 1981 240D (73K) 1982 300CD (169k) 1985 190D (169k) 1991 350SD (113k) 1991 350SD (206k) 1991 300D (228k) 1993 300SD (291k) 1993 300D 2.5T (338k) 1996 Dodge Ram CTD (442k) 1996 Dodge Ram CTD (265k) Past Diesels: 1983 300D (228K) 1985 300D (233K) |
#4
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Some place there is another thread where you put a piece of Heater Hose between the Intake Manifold and the Air Filter Housing.
That worked for me but I do not remember what size hose I used. With the above method you do not need to drill; but I did glue mine down.
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84 300D, 82 Volvo 244Gl Diesel |
#5
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Or, you can saw 3/16" of the bracket that is bolted to the top of the valve cover. That will provide enough clearance.
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1984 300SD turbo 126 "My true love" God made me an atheist and who am I to question His wisdom |
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