Removal And Installation: Camshafts: Installing
- Tightening specifications, refer to VALVETRAIN OVERVIEW .
The sealing surfaces must be completely free of oil and grease.
The pistons must not be positioned at TDC.
Make sure that all roller rocker arms make contact correctly on the valve stem tips
Note the expiration date of the silicone sealant.
The cylinder head cover must be installed within 5 minutes after applying the silicone sealant.
-- Remove any sealant residue on the cylinder head using a flat blade scraper.
- Wear protective eyewear.
-- Remove any sealant out of the groove in the cylinder head cover as well as from any sealing surface using, for example, a rotating plastic brush.
-- Clean the sealing surfaces, they must be free of oil and grease.
-- Cut the sealant tube nozzle at the front mark (nozzle diameter: approximately 2 mm).
-- Lubricate the running surfaces of both camshafts.
-- Place the camshaft into the cylinder head, the recesses -arrows- must be perpendicular to each other.
-- Replace the cylinder head cover bolts.
-- Apply the silicone sealant to the clean sealing surface of the cylinder head cover as shown -arrows-.
- Thickness of sealant bead: 2 to 3 mm.
The cylinder head cover must be installed within 5 minutes after applying the silicone sealant.
The sealant bead may not be thicker than specified, otherwise the excess sealant could enter the oil pan and clog the oil intake tube strainer.
Note the expiration date of the sealant.
-- Tighten the bolts in several passes:
- Tightening sequence and specification, refer to Figure.
-- Insert the cap -1- without sealant using the thrust piece T10174:
- Dimension -a- = 1 to 2 mm.
-- Rotate the vibration damper into the TDC position -arrow- using the counter hold tool T10355:
- The notch on the vibration damper must line up with the arrow mark on the lower timing chain cover.
-- Mount the camshaft timing chain:
- The marks on the drive chain/chain sprockets -arrows- must align.
-- Turn the intake camshaft using a wrench in the -direction of the arrow- and mount the timing chain.
Further installation is in the reverse order of removal.