| Remove lower timing cover |
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| Remove timing chain |
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| Remove oil pump drive chain. |
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| Remove bolt from oil pipe located on left of crankshaft,
remove pipe |
| Remove crank gear with BMW special tools 11 2 000 and 11 2
004, or a gear puller. |
| Remove 10mm nut from above shaft for upper guide gear on front
left of head. Use BMW special tools 11 3 040 and 11 3 062 or equivalent puller to
remove shaft. Or alternatively, insert a 10x1.5 bolt and pull while rotating shaft with
bolt. |
Installation
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| If necessary, replace needle bearing in guide gear. Press out
old bearing from the rear, and install the new one from the rear. Replace the gear itself
if teeth show signs of wear, typically visible in the form of sharp teeth tips, rather
than the blunt edges of a new gear. |
| Replace O ring on guide gear shaft, lubricate O ring,drive
shaft partially in with bore facing up. Slide the guide gear onto the shaft , drive
the shaft all the way in against the stop. As O ring is entering cylinder head, rotate
shaft to reduce chance of tearing O ring during installation. |
| Heat crank gear to a Max of 200° C for easy installation |
| Replace O rings on oil pipe. |
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