I just purchased a b10 biturbo
Congratulations! Welcome to the board!
Which production number is your BT?
and the clutch is not only very stiff but it engages right off the floor. Can this be adjusted/clutch replaced to allow for engagement further up and less abruptly? if i need a new clutch is the alpina OEM the way to go?
Stiffness is part of the car. New pressure plate will reduce it a bit.
There are some adjustment on the clutch pedal. There should be an excentric bolt which would give the opportunity to adjust the clutch pedal a bit up if this isn't already done.
Next thing to check is the hose between the pedal and gearbox actuator. It is under the car and Alpina recommend to replace it for an enforced one. The stock 535i part is not suitable for the higher pressure needed to release the clutch.
I believe the clutch disc can be bought by Sachs P/N from any store, not sure for the pressure plate.
The variable boost control know is not working ; boost working well; max boost reads 2.0 bar car is very strong-
any suggestions re diagnosis and remedy to get this adjustment working would be appreciated.
THanks
jh_m5
Max boost should be 1.8bar while the variable boost knob is moved to the right and 1.6 if moved to the left. High chance the control unit is disabled and a fixed boost controller is placed in between. Does the LED above the variable knob lights up when the ignition is on and engine is not running?