Camshafts, removing and installing: Installing
WARNING: This page is about a different variant/trim than selected.
NOTE:
- When installing the camshafts, the cam lobes for cylinder 1 must point upward.
- When installing bearing caps, verify marking on cap is readable from intake side of cylinder head.
- Place drive chain onto both camshaft sprockets according to color markings.
NOTE:
- When using a new drive chain, distance between notches - A - and - B - must be 16 rollers on the chain.
- Illustration shows where first and sixteenth drive chain rollers must be installed on chain gears.
- Notch - A - is slightly offset inward toward chain roller - 1 -
- Replace rubber/metal seal for camshaft adjuster or chain tensioner and coat hatched surface with thin coat of sealant D 454 300 A2 . (Part numbers are for reference only. Always check with your Parts Department for the latest part number information).
- Insert camshaft adjuster/chain tensioner between drive chain.
- Oil running surfaces of both camshafts.
- Insert camshafts with drive chain and camshaft adjuster/chain tensioner into cylinder head.
- Tighten camshaft adjuster/chain tensioner to 10 Nm (pay attention to bushing).
- Alternating in diagonal sequence, tighten bearing caps 2 and 4 of intake and exhaust camshafts and tighten to 10 Nm (pay attention to bushing).
- Install both bearing caps on chain gears of intake and exhaust camshafts. Check camshaft for proper adjustment and tighten bearing cap to 10 Nm (pay attention to alignment bushing).
- Remove chain tensioner retainer 3366.
- Coat hatched surface of double bearing cap lightly using sealant AMV 174 004 01 , install and tighten to 10 Nm (pay attention to bushing). (Part numbers are for reference only. Always check with your Parts Department for the latest part number information).
- Install remaining bearing cap and tighten to 10 Nm (pay attention to alignment bushing).
- Install camshaft gear (thin rib toward outside and TDC marking visible) and tighten bolt to 65 Nm (use Retainer 3036 ).
- Check position of camshafts - arrows - to each other again.
The rest of assembly is basically a reverse of disassembling.
How to install toothed belt and adjust valve timing, refer to Toothed belt, removing, installing and tensioning .
NOTE:
- After installing new valve lifters, the engine may not be started for approx. 30 minutes. The hydraulic equalization elements must seat themselves (otherwise the valves will crash into the pistons).