Cleaning Intake Manifold - Page 2 - PeachParts Mercedes-Benz Forum

ROLLGUY · #16 12-18-2019, 10:23 AM

Quote:

Originally Posted by Maximan1

I had my filthy OM617 block and head hot tanked at a SoCal local machine shop, no problem.

Also, that "members mark" degreaser from Sam's Club works insanely well at getting filth removed. I ran it in my parts washer and while it was a messy job, it cleaned insanely well.

A block and head are way different than a carbon crusted intake manifold. Shops try to get most of the grease/oil off blocks/heads before putting them in the hot tank.

chasinthesun · #17 12-19-2019, 11:16 AM

It’s been called Black Death and it’s become a thing on newer high mileage Mercedes diesels that disregard the injector seals , we call them injector shields . It’s a copper crush washer in the recent diesels . The carbon goo is created over time at the top of the injector due to failing worn copper washer and sometimes creates unserviceable injectors that are frozen into place due to carbon . On 2 of my 300ds it was present in the intake , a lot of degreaser , If I do it on my 3rd car I’m going to use a radiator shop , a lot of mess to clean up and you spend $25 on cleaner and car wash change getting it somewhat clean . Order a turbo gasket kit that comes with the intake gasket , it should come with all your turbo o ring plumbing and pipe gaskets.

Mxfrank · #18 12-19-2019, 03:02 PM

OP was talking about a "classical" 617, which suffers the usual EGR goo. "Black death" on newer engines is something else. It's caused by injector seal failure, which allows fuel and combustion byproducts to spew out across the head area.

gregp1962 · #19 12-26-2019, 06:34 PM

Quote:

Originally Posted by Madmax55

cons/pros to disabling? how would you suggest? plug it up or run it under the car?(rust prevention?

)

regarding disabling the EGR.

Pros, runs cleaner. Better fuel mileage.

Cons, you won't get the privilege of cleaning your intake manifold in another 100k miles.

There is absolutely no reason to keep your EGR functioning. Contact ROLL GUY in this forum for a kit to disable.

Mxfrank · #20 12-26-2019, 11:14 PM

Quote:

Originally Posted by gregp1962

regarding disabling the EGR.

Pros, runs cleaner. Better fuel mileage.

Cons, you won't get the privilege of cleaning your intake manifold in another 100k miles.

There is absolutely no reason to keep your EGR functioning. Contact ROLL GUY in this forum for a kit to disable.

$1000 fine if they ever start enforcing diesel emissions. Social responsibility not to pollute. Negligible impact on fuel economy or performance.

Madmax55 · #21 12-27-2019, 03:28 PM

Quote:

Originally Posted by gregp1962

regarding disabling the EGR.

Pros, runs cleaner. Better fuel mileage.

Cons, you won't get the privilege of cleaning your intake manifold in another 100k miles.

There is absolutely no reason to keep your EGR functioning. Contact ROLL GUY in this forum for a kit to disable.

ah I meant removing the CCV not the EGR. my non turbo doesn't have EGR. I was looking to route my CCV line under the car or something since I just cleaned my intake after new header/gaskets

speednjay · #22 12-27-2019, 04:07 PM

Quote:

Originally Posted by Mxfrank

$1000 fine if they ever start enforcing diesel emissions. Social responsibility not to pollute. Negligible impact on fuel economy or performance.

Most people don’t even know what egr is. Majority of cars 20 years ago and up don’t have it. I’d be shocked to believe that a cop knows exactly what to look for then cares enough to write paperwork on it. Egr has been nothing but problems and does very little for emissions

ROLLGUY · #23 12-27-2019, 09:36 PM

Quote:

Originally Posted by speednjay

........Majority of cars 20 years ago and up don’t have it...............................

Really??? I doubt there is not one vehicle sold in the USA since the '70s that did NOT have an EGR, gas or Diesel. Most if not all newer Diesels also have an EGR cooler (as well as an EGR of course).

carock · #24 12-28-2019, 02:48 AM

The fact that the EGR computer is kaput solves this dilemma pretty quickly....

BillGrissom · #25 12-29-2019, 03:18 PM

Quote:

Originally Posted by ROLLGUY

Really??? I doubt there is not one vehicle sold in the USA since the '70s that did NOT have an EGR, gas or Diesel. ...

Neither of my Chrysler minivan gas engines have EGR. One is a 1996 2.4L "federal" and the other a 2002 3.8L CA. The CA one does have a special CA/NY catalytic converter. I think the same engines used in passenger cars did have EGR. Why not in a minivan? Because they are classed as "truck", and are thus allowed to pollute more. Congress decided not to "impact business" when they set the emissions laws.

I removed the EGR valves and clutter of vaccum/electric sensors & controls on my 1984 & 1985 CA 300D's. I don't think any of it worked anymore, parts weren't available, nor description of how it is supposed to work, so impossible to maintain. To demonstrate the absurdity of the Rube Golberg design, the AC compressor stopped turning on, which was because the OVP relay failed. It's sole job is to protect the (kludged-on) "EGR computer" from an alternator Vreg failure. That kills the rpm signal, which the KLIMA control box uses to decide when the AC compressor can actuate. I ripped all that mess out to0 and jumpered the rpm signal direct to the KLIMA.

cmac2012 · #26 12-29-2019, 03:25 PM

I think this may have been aluded to here and there. Seems one could seal up the underside of the EGR so it was the same as a steel plate but still looked like a working EGR.

I'm planning to soon remove the intake manifold on my 300D for cleaning, inspection. I'll research the EGR options more thoroughly ahead of that. Going to get an intake/ex. manifold gasket on my next Pelican order.

The PO of my SDL deleted the complicated emissions business as well as the EGR.

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