Removal of camshafts in the right cylinder head must be carried out using tools «11.2.300», «11.2.441», «11.2.443», «11.2.444», «11.2.445» And «11.5.180».
Prepare camshafts for removal:
- turn the exhaust camshaft by the hexagon so that the cams of the valves of the 2nd cylinder stand vertically upwards (the upper arrow of the circle, fig. 4.92).
- turn the intake camshaft by the hexagon so that the cams of the valves of the 1st cylinder stand vertically upwards (lower circle arrow).
Installation of camshafts should be carried out in the following order.
Install the exhaust and intake camshafts on cylinder bank 1-4. Camshafts are marked «A,1–4» for exhaust valves and marking «E,1–4» - for inlet valves.
When installing, turn the exhaust camshaft by the hexagon so that the cams of the valves of the 2nd cylinder are vertically upwards, and the cams of the inlet camshafts of the 1st cylinder are also vertically upwards.
Install bearing caps in place. The exhaust camshaft bearing caps are marked A1 to A5, readable from the intake side. The intake camshaft bearing caps are marked E1 to E5, readable from the intake side.
Install fixtures «11.2.445» (A) And «11.2.441» (E) (pic. 4.93) on the camshafts on the bank of cylinders 1-4.
Using a wrench (see fig. 4.50), adjust the position of the camshafts so that the tools «11.2.445» And «11.2.441» fit snugly to the cylinder head, without a gap.
Install fixture «11.2.443» (fig 4.93) on fixtures «11.2.445» And «11.2.441» and fix it with a bolt «11.2.444», screwed into the spark plug hole.
Attention! Before starting the engine, remove the tool «11.5.180».
Assemble the engine. Installation of valve timing requires highly qualified technical personnel and special equipment, so it should only be carried out on CTOA-BMW.