Camshaft, Removing And Installing, Engine With Camshaft Adjustment: Installing

• The sealing surfaces must be free of oil and grease.
• Pay attention that all roller rocker levers rest on the valve stem ends.
• The crankshaft must not be at "TDC".

-- If the crankshaft was turned in the meantime: bring the piston for cylinder 1 to TDC and then turn the crankshaft back again slightly.

-- Remove any sealant residue from the groove on the cylinder head cover as well as on the sealing surfaces.

-- Remove any seal out of the groove in the cylinder head cover -1- as well as from any sealing surface using, for example, a rotating plastic brush.

-- Clean any oil or grease off the sealing surfaces.

For New Camshafts 

-- Transfer the self-made markings from the old camshafts to the new camshafts.

All 

-- Lubricate the running surfaces of both camshafts.

-- Install the camshaft with the :T40191  as shown. Move the spacers into the correct position if necessary.

TIP: 

If available, use a second set of :T40191  or reposition the :T40191/1  .

-- Install the camshafts into the cylinder head; the factory markings -arrows- must be located as shown.

TIP: 

Ignore the self-made markings.

-- Check the alignment -arrows- of the camshafts.

TIP: 

Be sure to check the expiration date of the sealant.

-- Cut the tube nozzle at the front marking (nozzle diameter: about 2 mm).

-- Apply the silicone sealant on the clean sealing surface of the cylinder head cover as shown -arrows-.

• Sealant bead thickness: approximately 2 mm.

TIP: 

Pay attention that the cylinder head cover is not tilted.

The cylinder head cover must be installed within five minutes after application of silicone sealant.

The sealant bead may not be thicker than specified, otherwise excess sealant could enter the oil pan and clog the oil intake pipe screen.

-- Mount the cylinder head cover on the cylinder head.

-- Tighten the bolts in several steps. Refer to Figure for the tightening sequence.

-- Drive the cap -1- in without sealant using the :T10174  .

• Installation depth -a- = 1 to 2 mm.

-- Turn the vibration damper to the "TDC" -arrow- position.

• When turning the crankshaft, make sure that no components are not damaged by the timing chain.
• The notch on the vibration damper must align with the arrow marking on the lower timing chain cover.

-- Turn the intake camshaft in direction of -arrow 1- until the marking -3- aligns with the :T40271/2  .

-- Slide the :T40271/2  into the chain sprocket splines in the direction of -arrow 2-.

-- Turn the exhaust camshaft in the direction of -arrow 1- until the marking -3- aligns with the :T40271/1  .

-- Slide the :T40271/1  into the chain sprocket splines in the direction of -arrow 2-.

-- Mount the camshaft timing chain. Refer to CAMSHAFT TIMING CHAIN, REMOVING FROM CAMSHAFTS .

There are additional procedures depending on the model. Refer to VALVE TIMING, CHECKING .