18-03-15, 07:48 AM
3mm is a shade slack ... I aim for 1.5mm but the acid test is whether the fault code shows 
Sounds like the OP's valve spindle is slightly bent or the valve is snagging for some other reason. It doesn't take much to stop the servo motor from turning.

Sounds like the OP's valve spindle is slightly bent or the valve is snagging for some other reason. It doesn't take much to stop the servo motor from turning.