Author Topic: Rattle in cabin  (Read 3882 times)

gcw206

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Rattle in cabin
« on: June 01, 2017, 21:54:42 »
Hello,
I have a rattle in the front of the cabin (driver side) of my 1969 280SL that is driving me crazy.
First some background:
About 5 years ago, I refurbished the interior.  The entire interior was removed, the non working gages were repaired, Dyna Mat was installed under the new carpet and pad, the dash was repainted, etc.  Upon assembly, there were no rattles, even when driving over rough cobblestone roads.
THEN, I recently developed a rattle in the front of the cabin, and I have been chasing it for about 2 months. 
The work done so far (in the past few weeks):
I removed the entire heating/ventilation system (with the exception of the driver side fiberboard duct).
I removed the clock, the glove box, the speaker grill and speaker, the front carpets, the gages, and the radio.
I ran a coat hanger down the fresh air drains at both ends of the fresh air "trough" (thought I might have dropped some small hardware).
I checked under the almost bare dash, and found several minor items that I corrected.
I looked under the hood and tightened anything loose.
The speedo and the tach cables are new, as is the rebuilt throttle linkage.
Still, the rattle persists.  I am planning not to install the rebuilt heating/venting system until this rattle problem is solved.  If I must tear it down again, then I will do that; but at this point I don't have any idea what to look for.  Does anybody have any ideas?  Thanks, Galen

kampala

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Re: Rattle in cabin
« Reply #1 on: June 01, 2017, 22:57:37 »
This is a long shot - but I had a very faint rattle that I thought was coming from the dash.  It turned out to be the mirror glass on the outside driver's side mirror.   I had replaced the glass with one of the wide view mirrors available from Mercedes.  There is a spring that pushes on the back of the mirror and if the thin cork is missing from the back of the mirror - you get a faint rattle from the spring against the back of the mirror.  I had the exact same rattle on both cars.   

Good luck with the hunt.  Time to pull out the mechanic's stethoscope.
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280sl - 1971 - Auto - LSD

mbzse

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Re: Rattle in cabin
« Reply #2 on: June 01, 2017, 23:23:32 »
Quote from: gcw206
.../... I recently developed a rattle in the front of the cabin, and I have been chasing it.../...
Did you remove the cabin heater? The metal plate on the heater has a habit of coming loose, and it will rattle!
Alfred/66andBlue has written about the issue; attached see his picture
/Hans S

BaronYoungman

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Re: Rattle in cabin
« Reply #3 on: June 02, 2017, 14:11:58 »
That metal heater deflector plate seems like a good suspect.. it can look like it is in place but if that deadening material between it has deteriorated it will cause a vibration or rattle.
Bob
Bob "Baron" Youngman
1971 280 SL silver  1 car 0 boxes
1983 500sec Wheeler Dealer AMG w AMG coupe
1965 220se coupe restomod
1988 560sec  Japan "Yakuza Car"

cfm65@me.com

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Re: Rattle in cabin
« Reply #4 on: June 02, 2017, 14:20:11 »
Hi Galen,
Is it not perhaps the antennae? If it is mounted in your right front fender, it could be the bottom clamp is not secured properly or has come loose. Remove the RH side kick panel to gain access into the right fender.
Good luck
Chris
Cape Town
28 Ford Model A Pickup
29 Chevy Phaeton
67 E Type FHC
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Benz Dr.

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Re: Rattle in cabin
« Reply #5 on: June 02, 2017, 22:42:42 »
It could also be a cryptic message from a former girlfriend.  ;)
1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
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1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
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1965  230SL
1967 250SL
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gcw206

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Re: Rattle in cabin
« Reply #6 on: July 23, 2017, 17:59:53 »
Update:
I have solved the rattle problem:  It was loose hinges on the fresh air vent.  When they were removed, lubed, and a new gasket installed, the problem went away.
This is a great site! Thank you!
Galen