Engine running rough and no one knows why
MBWorld Fanatic!
Joined: Jan 2007
Posts: 1,152
Likes: 29
From: Sydney, Australia
190D 2.5 (x2), 190E 2.6, W202 C240,W202 C43 (C55), W210 E55, W212 E250CDI
The cam is only spinning at 2500rpm at most, most of it's life it'll be below 1200rpm. A cam is only about $600 new so it's relatively cheap piece of mind.
As for reducing future carbon build-up issues, the simplest option is to add a oil catch can setup to the crankcase breather system. You also need to used a bit more high rpm/high load driving occasionally to minimise carbon build-up whilst it's still soft.
If you're looking for a more complete solution you can look at blocking off the EGR flow/disabling it. I would look at the UK MB tuners or some of the Jeep forums as they do this mod more often then you would find in an American MB forum.
EGR isn't normally an issue, it's the huge quantity modern diesels compared to older diesel engines as they now use it to aid engine warm-up, reduce engine noise under light loads as well as for emission reasons.
As for reducing future carbon build-up issues, the simplest option is to add a oil catch can setup to the crankcase breather system. You also need to used a bit more high rpm/high load driving occasionally to minimise carbon build-up whilst it's still soft.
If you're looking for a more complete solution you can look at blocking off the EGR flow/disabling it. I would look at the UK MB tuners or some of the Jeep forums as they do this mod more often then you would find in an American MB forum.
EGR isn't normally an issue, it's the huge quantity modern diesels compared to older diesel engines as they now use it to aid engine warm-up, reduce engine noise under light loads as well as for emission reasons.
