E280 cdi Oil consumption Problem
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e280 Cdi
E280 cdi Oil consumption Problem
Hello there , my I’m Alex and here is the problem that I’m having with my e280 w211 2008 model , the problem is my car consume like 0.8 L in 500 Kilometers but the real question is how this is possible from the moment that my engine has no signs of leaking oil nor inside or under the engine and the second I don’t get any kind of smoke from my exhaust .. it’s really frustrating for me .. please help
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E320 CDI
What's your odometer read? Engine?
No oil outside means it's happening inside. Inside means rings or valves. Could also be turbo, but I'd think that you'd see evidence of this on your intercooler piping: could pop off and check inside to see if you're getting pooling at all (look on the inlet side of the intercooler- possible that your piping is well sealed up. Diesels are oil burners: the engine oil will be burnt up just fine (only really will notice if you're pumping LOTS of oil, as in the turbo has crapped).
No oil outside means it's happening inside. Inside means rings or valves. Could also be turbo, but I'd think that you'd see evidence of this on your intercooler piping: could pop off and check inside to see if you're getting pooling at all (look on the inlet side of the intercooler- possible that your piping is well sealed up. Diesels are oil burners: the engine oil will be burnt up just fine (only really will notice if you're pumping LOTS of oil, as in the turbo has crapped).
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C320
Hello there , my I’m Alex and here is the problem that I’m having with my e280 w211 2008 model , the problem is my car consume like 0.8 L in 500 Kilometers but the real question is how this is possible from the moment that my engine has no signs of leaking oil nor inside or under the engine and the second I don’t get any kind of smoke from my exhaust .. it’s really frustrating for me .. please help
Mercedes specified very thin gasoline oil for these diesel engines (0w30, 5w30) very long oil change intervals (10k to 20k miles), lots of EGR to reduce emissions and finally DPF regenerations that pushed soot down into the piston rings. The top two compression rings are usually just fine. Good compression and good power. But the third ring down on the piston the oil control ring become stuck in the piston ring groove. The oil control rings job is to scrape oil off the cylinder walls. When the ring gets stuck it can't do its job so the oil ends up in the combustion chamber where it burns a long side the fuel. Your OM642 is equipped with a DPF designed to catch diesel soot, store it and periodically burn it off. Its just as good as catching burnt engine oil smoke. Obviously burning oil is not ideal for the DPF in the long term. It'll Regen more often burning more fuel and eventually it becomes clogged and your car will be in limp home mode with no turbo boost.
Long story short, It's a design flaw in the om642. You can keep running like this for a very long time if you just keep topping off the oil. The consumption will only get worse. The only solution to replace or rebuilt the engine with new rings.
Heres a Piston from a 220k mile om642 powered R350. Top 2 rings good as new. Bottom ring stuck solidly in the ring groove. Piston crowns caked in black carbon. This is the typical failure mode.
Last edited by tjts1; Jan 22, 2023 at 05:08 PM.
