Just about a year ago my '87 300SDL started with a low power situation that just kept getting progressively worse until it would barely move, then stopped running altogether. Turns out it was a plugged catalytic converter. Mine developed the problem at 252,000 miles.



'87 300SDL 275,000
'94 SL500 50,000

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jcciem
'94 SL5000 60,000
'91 350SDL 545,000
'91 350SD 197,000
'00 E55 AMG 77,000

I pulled the cat off and it seemed to help some however I decided to pull the intake manafold off and clean it out. It was full of gunk as well as the ports and the surrounding area around the intake valves. My plan is to try and clean everything up at leasst as much as possible. Any Ideas on things I might be careful of? Any one have an idea on why I would have so much gunk build up?

is the motor fitted with an EGR valve. They have a habbit of causing the inlet system to block up.

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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving

Where is it located if it has one? I see something abobe the turbo that looks like an egr valve is that it? or is it somewhere elese? Thanks

There's a bunch of EGR pics here:

http://www.w124performance.com/images/OM603_intake/

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1982 240D, sold 9/17/2008
1987 300D TurboW124.133 - 603.960, 722.317 - Smoke Silver Metallic / Medium Red (702/177), acquired 8/15/2009
262,715 and counting