Walnut blast M278?
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From: 122W, 37N
2016 E350 4Matic wagon, 2019 Ford Expedition, 2019 Chevy Bolt EV
maybe if the engine was out for a major rebuild or something, but to pull it just to clean it? you can't even SEE the engine block under all the plastic.
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From: FL
2012 E550 sedan 2019 E63 Wagon
In your case the intake manifold would come off, but not the engine. In my case the intercooler would have to come off, but not the engine. The engine came off of that one because of the aftermarket ARP studs failure.
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From: 122W, 37N
2016 E350 4Matic wagon, 2019 Ford Expedition, 2019 Chevy Bolt EV
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From: Sammamish, WA
2011 E350 Wagon, 2010 GL450
Unless I'm seriously misunderstanding the setup of the M278, all you should need to do is pull the intake manifold off and the valves will be easily visible. You're blasting the top of the valve, not the portion that's inside the combustion chamber.
Not the same vehicle or engine, but this provides a good high-level understanding of the procedure.
https://blog.fcpeuro.com/how-to-carb...valves-mk7-gti
Edit: I did some looking around and it sounds like Mercedes' PCV system works pretty well at keeping oil out of the air so you may never "have" to do it, but if it were me I'd be checking the valves at every 50k miles to see how they look. If they're clean enough, you're probably safe just leaving it alone.
Not the same vehicle or engine, but this provides a good high-level understanding of the procedure.
https://blog.fcpeuro.com/how-to-carb...valves-mk7-gti
Edit: I did some looking around and it sounds like Mercedes' PCV system works pretty well at keeping oil out of the air so you may never "have" to do it, but if it were me I'd be checking the valves at every 50k miles to see how they look. If they're clean enough, you're probably safe just leaving it alone.
Last edited by atraudes; May 11, 2021 at 06:43 PM.
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'11 E350, '11 E550, '98 M3, '95 E320
They have blasting/vacuum adapters which allow cleaning on car... I've seen them for BMWs. Like Atraudes linked in the FCP blog. Basically the intake manifold comes off, cylinder on which your cleaning is brought up on TDC (compression stroke, valves closed), adapter fitted, blast walnut media into runner while simultaneously vacuuming out debris... repeat for remaining cylinders.
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From: Pepper Pike Ohio
24 GLS580 '23 E450 4matic 12 E350 4Matic
I think it's probably a good idea, especially after seeing those pictures, I may do this at the second spark plug change. {have this done}
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From: 122W, 37N
2016 E350 4Matic wagon, 2019 Ford Expedition, 2019 Chevy Bolt EV
I like the "Italian tune-up" idea. Just have to spend a hour or so in the mountains in "S" mode once in awhile, otherwise this thing spends way too much time under 2000 rpm.
MBWorld Fanatic!
Joined: Dec 2020
Posts: 2,412
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From: 122W, 37N
2016 E350 4Matic wagon, 2019 Ford Expedition, 2019 Chevy Bolt EV
MBWorld Fanatic!
Joined: Dec 2020
Posts: 2,412
Likes: 1,483
From: 122W, 37N
2016 E350 4Matic wagon, 2019 Ford Expedition, 2019 Chevy Bolt EV
