my diesel is too quiet - PeachParts Mercedes-Benz Forum

odie · #1 05-04-2007, 12:55 PM

I just picked up an 87 300TD

. It's so quite compared to my 84 190D. I thought both these cars had the engine encapsulation that reduced diesel noise.

But the 190 rattles pretty loud and the 300 is almost as quite & smooth as my friend's Infinity.

It's hard to believe they are that different. Both are the newer aluminum head type engines. But the 300 is a Six with turbo while the 190 is a Four NA.

I guess the encapsulation is just much better with the 300s. Even with the hood up it's pretty damn quite.

Driving it home I was kinda woudering if I got bait & switched with a gasser

babymog · #2 05-04-2007, 01:03 PM

The 2.5 in the 190D is pretty quiet also.

bgkast · #3 05-04-2007, 01:03 PM

Remove the muffler.

The W124 probably has more sound-deadening material because it was a more upscale car. I know there is a lot more insulation in a W123 300D than a 240D.

Jadavis · #4 05-04-2007, 01:29 PM

Stop running biodiesel in it.

If you're not running biodiesel in it, you should hear how quiet it is with biodiesel!

-Jim

riethoven · #5 05-04-2007, 01:59 PM

I'm envious. I have sat in about an hour and a half of standstill traffic today and even though I just adjusted my valves, my car was sounding awfully loud. I can't wait to get my W124 with the OM603.961 in it. This summer for sure.

odie · #6 05-04-2007, 02:18 PM

I knew the newer, post 123 series cars were quieter. But I had no idea how quiet. It's quiter than my 4.0 EFI Jeep.

I drove a 1986 300D with what I assume is the same engine & encapsulation about 2 months ago and it was not this quiet.

I wounder if the lack of Turbo on the 190 makes that much a difference?

vstech · #7 05-04-2007, 02:31 PM

turbos are indeed very efficient noise cancellation devices.
compare a 240 or 300 N/A to a post 82 Turbo'd one!

gsxr · #8 05-04-2007, 05:14 PM

The noise level can vary with condition of the injectors, injection timing, valve lifters, and a number of other things. The noise encapsulation doesn't do a whole lot (it helps though). If your 190 is a lot louder than the 300, something isn't right.

odie · #9 05-04-2007, 05:45 PM

the 190 is much louder than my 124 1987 300TDT....But about the same as my 123 1982 300TDT

Hatterasguy · #10 05-04-2007, 06:04 PM

Quote:

Originally Posted by gsxr

The noise level can vary with condition of the injectors, injection timing, valve lifters, and a number of other things. The noise encapsulation doesn't do a whole lot (it helps though). If your 190 is a lot louder than the 300, something isn't right.

Yeah, they shouldn't be that much louder. The 603 will be a bit smoother because its an I6 and they are naturaly balanced. Unlike I4's.

rudolfgreen · #11 05-04-2007, 07:40 PM

the 602 2.5T 5cyl has the sweetest ol skool idle growl, though smooth.. the 603 3.0T 6cyl is just an all 'round beast.

babymog · #12 05-04-2007, 07:42 PM

Comparing my '87 190D turbo to my '87 300D turbo, pretty close. The 300D was perceptibly quieter, but both were well within drive-through ordering levels.

I'll never understand why Dodge leaves those cummins so noisy, sounds more like a farm tractor than a civilized vehicle. My Caterpillar engines have all had sound-deadening bolted to the block and oil pan, much quieter than a Dodge pickup. Diesels should be envied, not obnoxious.

#13 05-04-2007, 07:45 PM

Quote:

Originally Posted by babymog

I'll never understand why Dodge leaves those cummins so noisy, sounds more like a farm tractor than a civilized vehicle. My Caterpillar engines have all had sound-deadening bolted to the block and oil pan, much quieter than a Dodge pickup. Diesels should be envied, not obnoxious.

LOL, apparently you don't understand the american pick-up truck market, it's all about "obnoxious," with bonus points for lots of black smoke. Someone needs to tell these guys about viagra.

OldPokey · #14 05-04-2007, 09:21 PM

I was waiting for a muffler to be installed on my old car a while back. One of the other customers went out to his truck after paying and started it up - it was so loud, dust was literally being shaken from the ceiling tiles. He switched off the engine, walked back into the shop and said to the person behind the counter:

Quote:

Can you make it louder?

bullwinkle · #15 05-04-2007, 09:43 PM

Quote:

Originally Posted by babymog

Comparing my '87 190D turbo to my '87 300D turbo, pretty close. The 300D was perceptibly quieter, but both were well within drive-through ordering levels.

I'll never understand why Dodge leaves those cummins so noisy, sounds more like a farm tractor than a civilized vehicle. My Caterpillar engines have all had sound-deadening bolted to the block and oil pan, much quieter than a Dodge pickup. Diesels should be envied, not obnoxious.

The new Cummins powered Dodges with common-rail injection aren't nearly as bad-I've been told that the high output VP44/24 valve motors (like my '02) are the loudest of them all, I personally don't mind the noise that much, it quiets down quite a bit when it heats up-but it is a loud s.o.b. in the winter on a cold morning!