patxi
Senior Member
I have a 2011 E350 BlueEfficiency Estate and the temp gauge had been reluctant to get up past 80 for around a year but in the last 3 months dropped even less, not getting above 60 unless doing a DPF regen which was around every 500 miles.
I changed the thermostat 2 weeks ago and since then it has been running horribly, it hesitates and is reluctant to pick up speed from low revs. Right after the thermostat change there was an air leak around the turbo inlet which I fixed by taking the air boxes off and carefully reseating everything. At idle there is a slight feeling of air movement to the back left of the turbo (see pic) but I can’t work out exactly where it is from.
When I swapped the thermostat I managed to pinch the green sealing O-ring on the turbo inlet pipe but I put a new one on and that is not the problem.
I’ve now convinced myself that the EGR valve has gone wrong! My theory is that with the engine previously not getting to temp the EGR was sat there doing nothing except get clogged up, but now it is being asked to do its thing it is failing. Are they easy to take out and clean on this engine?
Fuel economy is currently rubbish, worse than it was before, and there is a sooty smell after parking. It has done 2 DPF regens only 100-odd miles apart in the last few days.
Any help or pointers of things to check appreciated. There are no DTCs.
I changed the thermostat 2 weeks ago and since then it has been running horribly, it hesitates and is reluctant to pick up speed from low revs. Right after the thermostat change there was an air leak around the turbo inlet which I fixed by taking the air boxes off and carefully reseating everything. At idle there is a slight feeling of air movement to the back left of the turbo (see pic) but I can’t work out exactly where it is from.
When I swapped the thermostat I managed to pinch the green sealing O-ring on the turbo inlet pipe but I put a new one on and that is not the problem.
I’ve now convinced myself that the EGR valve has gone wrong! My theory is that with the engine previously not getting to temp the EGR was sat there doing nothing except get clogged up, but now it is being asked to do its thing it is failing. Are they easy to take out and clean on this engine?
Fuel economy is currently rubbish, worse than it was before, and there is a sooty smell after parking. It has done 2 DPF regens only 100-odd miles apart in the last few days.
Any help or pointers of things to check appreciated. There are no DTCs.