Doing the head gasket and finding that the egr is pretty gunked up specifically the ss tube from the egr to the throttle actuator. It has a lot of tight bends in it. I don’t think I can get a speedo cable snaked through it. Would soaking it in gasoline overnight then blast some compressed air through it be enough? Anyone have any crafty ideas?

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1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero

I soaked the end of the tube which is the part that gets gunked up with this MEK substitute and it was able to soften up the junk and get it clean.

I disconnected both ends, the crqp was at the manifold end.

Soaked it for a couple of days, then chucked a speedo cable in the drill and cleaned out the tube. Still good nine years later.....

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles

I soaked it with floor stripper then ran a long zip tie through it. Confirmed it was clear by blowing air through it.

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1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero

It's been reported that most of the deposits form immediately adjacent to where it connects to the throttle, if that helps.

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95 E320 Cabriolet, 159K

I have had excellent luck in cleaning such equipment like egr tubes, bmw pair valves egr valves with mopar combustion chamber cleaner.

The trick is to get the part a bit warm first (like a small oven). Then spray it in a ventilated area. It literally melts carbon off.