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Old 03-20-2000, 09:27 PM
Posts: n/a
Has anyone ever pulled off the intake manifold on a diesel to clean it? At how many miles? Is this service recomended by MBZ? Did you actually notice a difference?
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Old 03-20-2000, 09:41 PM
Registered User
Join Date: Feb 2000
Location: Powder Springs, Georgia, USA
Posts: 206
I have never heard of it. Why would the intake be dirty ? It's just filtered air unless the seals in the turbo are gone or there is excessive blowby going thru the EGR valve. It both cases you would have bigger problems than a dirty manifold.
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Old 03-20-2000, 09:45 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
We have pulled the crossover pipe and cleaned the EGR area of debris. It is very common for the 603 to devlope alot of carbon there and for that carbon to break off and kill an engine.

1981 280GE SWB
1987 16V

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Old 03-20-2000, 09:58 PM
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Benzmac knows what I am talking about. Any pointers on cleaning this out. Have you ever tried a "engine vac"?
Thanks Benzmac!
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Old 03-20-2000, 10:15 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
This crossover gets caked half inch thich at times. I can't imagine cleaning it chemically on the car. We usually take a chisel to it with the part off the motor.

Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician
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Old 03-20-2000, 10:33 PM
Registered User
Join Date: Jun 1999
Location: Los Angeles, Calif, USA
Posts: 521
Visit the following web site. You will find a section about cleaning the intake.

Hope you enjoy it as well as I do.

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Old 03-21-2000, 11:53 AM
AMGmercedes's Avatar
Senior Member
Join Date: Jun 1999
Location: Baltimore, MD
Posts: 203
I took the intake manifold and crossover pipe off the car at 220K and took it to a machine shop. They soaked it in cleaner and a day later like new. It was caked on there pretty good. Plugged the egr to prevent this in the future and runs much better. Also replaced the intake manifold seal bc it was leaking due to time and sludge accumilation in the manifold. It cost me $30 to do, I recommend it.

1987 300SDL-T
1985 190E 2.3-16
1984 280GE Cabrio
1984 230TE
1978 240D
1957 220S(running one day, I hope!)
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Old 03-23-2000, 08:47 PM
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Does anyone else have directions for cleaning the crossover pipe and intake, aside from the website that was previously mentioned?
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Old 03-24-2000, 05:57 PM
Posts: n/a
I did see the article in The Star, does anyone else have anything else they can tell me that will help. The car runs fine, but this is more of a preventative maintenance item for me.
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