I'm doing the upgrade on my M42 with the factory BKR6E6 plugs and BREMI 11860 / 1 748 017 coils. After a few measurements and also by feel it seems that the internal spring on the coil is pushing down onto the plugs a few mm, but no more. It's not clipping into place much further in. Normally removing this type of coil is a bit of a battle, these just pop off easily. Is the top of the plug meant to fit further into the spring of the coil or am I OK?
Not tried firing it up yet, waiting on a new battery.
Not tried firing it up yet, waiting on a new battery.