vinkodex.OM651: the chain tensioner seal leaks and oil drips onto the exhaust
It does not show up on every car. Check before you buy.
critical
severity
not available
mileage
2
sources
2 sources next to the write-up.
The fault
How you spot it
The chain tensioner seal starts to leak and engine oil can drip onto the exhaust system. On the hot exhaust the oil can ignite.
The manufacturer issued a recall for it, covering more than 100,000 cars built between February and November 2014. The repair is free under the campaign. The visible signs are oil traces at the back of the engine and a burnt smell.
Which model
Who it affects
The card opens the generation, the engine or the transmission.
Engines and transmissions
Engine
OM651DE22LA
Engine
OM651DE18LA
vinkodex.Checklist
OM651: the chain tensioner seal leaks and oil drips onto the exhaust
What you would check for this fault. Take it to the car.
Before you buy
Checklist
What you tick stays on this device only.
Sources
How we know
What BreaksMercedes-Benz C-Klasse W204 — All Engines, Problems & Buying Guide (2007–2014)Mercedes-Benz C-Klasse W204: 66 common defects and weaknesses. 7 engines (OM651DE22, M271, M272, OM642, …), 102–517 hp. Reviews, durability and buying advice 2007–2014.- What BreaksMercedes-Benz B-Klasse W246 — All Engines, Problems & Buying Guide (2011–2019)Mercedes-Benz B-Klasse W246: 38 common defects and weaknesses. 5 engines (M270DE16, M270DE20, OM607, OM651DE18, …), 90–211 hp. Reviews, durability and buying advice 2011–2019.
Information, not an expert opinion
We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.
- A fault on the list does not mean the car you are looking at has it.
- A fault missing from the list does not mean the model is fault-free. Write-ups are made model by model. Not all of them are done.
- You decide whether to buy. This is no substitute for an inspection. That needs a workshop and a history check.