My 530D has 151K on the clock, my indy replaced the cam cover gasket recently, which involves removing the injectors -one was quite tight, and they struggled to remove it. When I collected the car they did say that a new injector might be required - it turns out this same injector was out of spec anyway, and a tapping noise was evident that wasn't there before, so I decide to have the injector replaced.
New injector fitted, the mpg seems to have improved - good news - but the tapping is still there.....it taps at half engine speed, as if it is a duff hydraulic tappet with too wider clearance, but I cant see why that could have happened. Do the vacuum pumps tap when they are worn? Or is there anything else I should look at?
New injector fitted, the mpg seems to have improved - good news - but the tapping is still there.....it taps at half engine speed, as if it is a duff hydraulic tappet with too wider clearance, but I cant see why that could have happened. Do the vacuum pumps tap when they are worn? Or is there anything else I should look at?