M80
Senior Member
- Joined
- Jan 21, 2006
- Messages
- 5,930
- Reaction score
- 2,733
- Location
- Derbyshire
- Your Mercedes
- 2014 639 Viano- 651, 5sp Auto. 2009 S211- 646, 5sp Auto.
It sounds like a compression test would be useful.
Pressure can escape the bores past the pistons or via the valves.
Oil can enter the inlet tract via the PCV valve, and could have caused your over revving. Too much oil at service might find a way out that way.
I would hold back on the oil service until you've investigated the condition of your engine.
Pressure can escape the bores past the pistons or via the valves.
Oil can enter the inlet tract via the PCV valve, and could have caused your over revving. Too much oil at service might find a way out that way.
I would hold back on the oil service until you've investigated the condition of your engine.