An other newbie question why do you remove the EGR,better power?

more power and a small boost in MPG's.

Just disconnect the vacuum lines and plug them.

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1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

The EGR system on the 617's is a failed attempt at reducing emissions. In reality it causes gunk to build up in the intake/head, and reduces power/efficiency. It's complicated vacuum valve controls often cause problems for the locks/HVAC/transmission systems. Many recommend removing it, as it has no benefits (Ecological nor performance)

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

So better to remove,or just block off vac lines,?

What is the year and make?

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92 300D 2.5L OM602 OBK #59

83 3ood

i did both on my 83 300D. blocked it off to fix the emissions "mistake" and plugged the lines to avoid the vacuum issues. got a nice kit off of e-bay from a member. he has a website too, google monster craftsman.

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1985 300D - 1984 Euro 280E AMG Clone (SOLD) - 1978 280CE (SOLD) - 1983 300D (SOLD) - 1981 300D (SOLD)

Most (including myself) notice at most a small amount of power and economy improvement but the intake manifold definitely stays cleaner. In theory, the engine runs a little cooler and produces fewer oxides of nitrogen. The simplest fix is a BB in the vacuum line; lacking a BB, you can use a soldering iron to melt closed the end of the plastic vacuum line and stick it back into the rubber connector. It will look the same but do nothing.

Sometimes the procedure is a function of the state or country of the vehicle's residence and the inspection laws therein. If you have to be inspected, you'll want something easily reversible; if there is no inspection, take the blame thing off (but keep it in a box somewhere, just in case).

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

I just have things plugged off. The engine bay will look cleaner with the valve removed, but no difference from the first sentence.

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83 SD

84 CD

I don't think mine was working when I removed it. If I remember correctly it was stuck open. A BB wouldn't have done any good.

Danny

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1984 300SD Turbo Diesel 150,000 miles

OBK member #23

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(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination

I blocked my EGR and took off the Black Box that on top of the valve cover too

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Current Garage
2008 Mercedes GL320 CDI 188k mi Repair/Work in progress
1994 S350 160k mi Garage Queen & prepping for repairs
2005 E320 CDI 203k mi Healthy & Daily Driver
1994 S350 357k mi Retried as parts car
1984 300TD 214k mi Blown OM617 Poss OM603 Swap??

Sold
1987 300SDL 200K+
1994 S320 181K mi
2008 E320 Bluetec 127k mi
1999 S420 130K mi
1980 240D 360k mi
15+ Others that has come, stay and gone

GONE, BUT NOT FORGOTTEN
1995 E320 SE 220k mi
1984 300SD 350k mi

I left the black box alone but did replace the connectors that go to the drivers side vac links with a one fewer connector.
On one car I removed the black box altogether.

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83 SD

84 CD

I have removed mine on my '83 300D, but have not cleaned the IM. How much of an improvement would this afford me, better performance, improved MPG ?

I recently removed the IM on the "99 E300D and I was shocked at the built up crud.

Gary

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Gary
Experience is something you get, Just after you needed it....
'99 E300 295K, '83 300D 220K, '75 240D 185K sold
'80 MCI Bus Conv DD 6V92TA, w/4 cyl. Kubota diesel GenSet 12.5KW

I removed all the vacuum lines related to the EGR... I don't want places that can leak on a system I'll never use. Neither of my diesel cars have a working EGR now, and as long as I can I'll keep them that way.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

Depends on how badly the intake is blocked. You might see a few per cent improvement but it depends on how carefully you monitor your mileage and whether you actually monitor performance, e.g., dynomometer or just "feel" that the engine has more power. I definitely "felt" that our '96 E300D had a little more power after cleaning its badly crudded-up IM. For most of us, the right foot has a larger effect upon fuel economy.

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970