Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 02-15-2007, 12:41 AM
Rafael1967
 
Join Date: Feb 2007
Location: Houston
Posts: 11
Sound deadening in the Engine

Is there anything that can be applied to the engine compartment to quite a bit the noise of my 300SD. One of my friends has a '82 300D turbodiesel and it is much quieter.

Any hints?

Raf
Reply With Quote
  #2  
Old 02-15-2007, 12:57 AM
bops1231
 
Join Date: Dec 2006
Location: Mount Pleasant SC
Posts: 13
Replace the insulation on the inner hood lid. Makes a huge difference.

john bonds
'82 240D
Reply With Quote
  #3  
Old 02-15-2007, 01:16 AM
anghrist's Avatar
Registered User
 
Join Date: Sep 2006
Location: Lancaster, CA
Posts: 558
Quote:
Originally Posted by bops1231 View Post
Replace the insulation on the inner hood lid. Makes a huge difference.

john bonds
'82 240D
What he said. Used this in the 240D owned by my girlfriend. It had none when we got it. Daylight/dark difference. Instead of the engine running inside what sounded like a lunchbox, now it's more of a dull roar.
Reply With Quote
  #4  
Old 02-15-2007, 01:30 AM
Jeremy5848's Avatar
Registered Biodiesel User
 
Join Date: Mar 2006
Location: Sonoma Wine Country
Posts: 8,390
I never noticed any difference when I put new insulation (the old was completely gone) in my W123 but I figure much of the sound escapes underneath.

My wife's '87 is another matter. The belly pans should trap some of the sound. I'm really interested is seeing how much quieter it gets when it finally warms up and dries off enough so I can install the insulation that currently is covering the spare bed. I'll probably even drag out my sound level meter and make some measurements.
__________________

"Buster" in the '95

Our all-biodiesel family
1995 E300D (W124) . .239,000 miles My car
1996 E300D (W210) . .313,000 miles Wife's car
Santa Rosa population 170,685 (2012)
Total. . . . . . . . . . . . 722,685
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970
Reply With Quote
  #5  
Old 02-15-2007, 11:26 AM
Rafael1967
 
Join Date: Feb 2007
Location: Houston
Posts: 11
Quote:
Originally Posted by Jeremy5848 View Post
I never noticed any difference when I put new insulation (the old was completely gone) in my W123 but I figure much of the sound escapes underneath.

My wife's '87 is another matter. The belly pans should trap some of the sound. I'm really interested is seeing how much quieter it gets when it finally warms up and dries off enough so I can install the insulation that currently is covering the spare bed. I'll probably even drag out my sound level meter and make some measurements.
RA - New hood pad installed jul06. I agree much the sounds comes from underneath and the cavernous hood space vs. 300d may make the difference. Interesting what are these belly pans and to they make them for w126 '83 300SD? A concern though is will it trap the heat making the drivetrain run hotter?

Thanks all- Raf
Reply With Quote
  #6  
Old 02-15-2007, 02:37 PM
Deni's Avatar
Registered User
 
Join Date: Aug 2005
Location: Tirana, Albania
Posts: 429
Add around 5% of fresh vegetable oil in your diesel. It won't harm your car and it will quieten it by quite a bit.
__________________
1992 Mercedes 190D 2.5 turbo 5sp manual. EGT+boost gauges. Boost controller set to ~14.5 psi. 1 1/4 turns on full load adjustment. LPG injection. Next in the list is water injection.
Reply With Quote
  #7  
Old 02-15-2007, 02:39 PM
Parrot of Doom's Avatar
1997 W210 E300TD 243,000
 
Join Date: Mar 2006
Location: Manchester, UK
Posts: 983
Check the condition of the plastic undertrays, they should be lined with absorbant foam - not having that will make the car much louder.
Reply With Quote
  #8  
Old 02-15-2007, 03:59 PM
Registered User
 
Join Date: May 2001
Location: Michigan
Posts: 1,373
Anyone know how I can get mine louder?
__________________
DAILY DRIVERS:
'84 300DT 298k (Aubrey's)
'99.5 Jetta TDI IV 251k (Julie's)
'97 Jetta TDI 127k (Amber's)
'97 Jetta TDI 186k (Matt's)
'96 Passat TDI 237k (Don's
'84 300D 211k Mint (Arne- Undergoing Greasecar Conversion)

SOLD:
'82 240D 229k (Matt's - Converted-300DT w/ 4 speed
Reply With Quote
  #9  
Old 02-15-2007, 04:12 PM
rrgrassi's Avatar
mmmmmm Diesel...
 
Join Date: Jun 2006
Location: Royse City Tx
Posts: 4,868
Straight pipe exhaust, or get a cherry bomb, blast out the fiberglass, then it will be straight pipe, but look like a glass pack...
__________________
RRGrassi


70's SPM #5608 Fairmont A-4 MOW car

06 VW Jetta TDI 210K miles

82 300D 322K My Daily Driver-Warndreicke in the trunk. Trip ODO still working!

90 Dodge D250 5.9 Cummins/5 speed. 350K
Reply With Quote
  #10  
Old 02-15-2007, 04:17 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 25,910
Quote:
Originally Posted by diesel don View Post
Anyone know how I can get mine louder?
a pair of 16" Woofers? which car do you want louder? one of those "cone" air filter kits seem to really bring up the noise level. you could also take out the windows, that will make it pretty loud in your cabin.
John:fork_off:
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #11  
Old 02-15-2007, 04:26 PM
Registered User
 
Join Date: Feb 2004
Location: Walnut Creek, CA (one day 6052'53.93"N, 15049'39.24"W)
Posts: 4,865
Quote:
Originally Posted by diesel don View Post
Anyone know how I can get mine louder?
Run it with the hood off.
__________________
Terry Allison
N. Calif.

09' E320 Bluetec 77k
Reply With Quote
  #12  
Old 02-15-2007, 04:29 PM
Jadavis's Avatar
Registered User
 
Join Date: Oct 2005
Location: Tennessee
Posts: 995
Quote:
Originally Posted by Deni View Post
Add around 5% of fresh vegetable oil in your diesel. It won't harm your car and it will quieten it by quite a bit.
This time of year use canola oil. It stays liquid down to 0F. Better yet, use some biodiesel made from canola oil. It is good down to -14F.

I looked at a 1987 300D two weeks ago. The owner asked why mine was so much quieter than his. I was running about 50% biodiesel. (To give the biodiesel even more credit, I don't have the hood pad installed. He did, and my car was still much quieter than his.)

-Jim
__________________
1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.
Reply With Quote
  #13  
Old 02-15-2007, 04:35 PM
Rafael1967
 
Join Date: Feb 2007
Location: Houston
Posts: 11
Quote:
Originally Posted by Parrot of Doom View Post
Check the condition of the plastic undertrays, they should be lined with absorbant foam - not having that will make the car much louder.

Do you have pictures, because I do not see these on the underside or side walls of the inner fenders in the engine bay? where can these be sourced?

thx - Raf
Reply With Quote
  #14  
Old 02-15-2007, 04:56 PM
Registered User
 
Join Date: Feb 2004
Location: Walnut Creek, CA (one day 6052'53.93"N, 15049'39.24"W)
Posts: 4,865
Early 80's models did not have belly pans.

They showed up in the late 80's; from the mid 90's most have had engine and also trans pans.
__________________
Terry Allison
N. Calif.

09' E320 Bluetec 77k
Reply With Quote
  #15  
Old 02-15-2007, 04:58 PM
Registered User
 
Join Date: Dec 2005
Location: Texas Hill Country
Posts: 510
I put in new homemade hood pad, that did sem to help....but it was still too loud for me.

I had a large chunk of 3/4" to 1" thick foam rubber....I cut that up and put under the carpet like a pad...under the seats...and stuffed the rear hatch full! THAT make it much BETTER!

And I make a new "gasket" for the hole where the steering wheel column comes through the fire wall....used this aluminum tar backed roof patching material and cut to suit.
__________________
Mark
1983 300TD Wagon
Even a broken watch is right twice a day
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 09:13 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page