Camshaft, Removing And Installing: Installing
- Tightening specifications. Refer to OVERVIEW - VALVETRAIN .
Replace the seals and the plugs.
- Crankshaft -1- secured in "TDC" using Crankshaft Locking Pin:T40069 .
- The hydraulic adjusting elements and roller rocker lever are inserted.
Risk of contaminating the lubricating system and bearing.
- Cover open parts of the engine.
Danger of eye injury.
- Wear protective eyewear.
-- Remove the sealant residue on the cylinder head and guide frame, for example using a rotating plastic brush.
-- Clean the sealing surfaces; they must be free of oil and grease.
-- Check the screen -arrow- for dirt; clean it if necessary.
-- Oil the camshaft running surfaces.
-- Insert the camshafts in the guide frame.
- The placement of the camshafts must be exactly within the axial bearings -arrows- of the guide frame.
- The compression ring ends -1, 2 and 3- must face up or down. They must never face sideways.
-- Rotate the guide frame with the camshafts inserted while holding them securely in the frame.
-- Rotate the camshafts until the threaded holes -arrows- face upward.
-- Check if the camshafts still lie in the guide frame axial bearings.
-- Secure the camshafts for cylinder bank 1 in "TDC" using the Camshaft Clamp:T40133/1 -arrows- (25 Nm).
-- Secure the camshafts for cylinder bank 2 in "TDC" using the Camshaft Clamp:T40133/2 -arrows- (25 Nm).
Be sure to check the expiration date of the sealant.
-- Cut the tube nozzle at the front marking (nozzle diameter: about 2 mm).
-- Rotate the guide frame again.
Risk of contaminating camshaft bearing with excess sealant.
- Do not apply sealant beads thicker than indicated.
-- Apply sealant beads -4 through 8- to the clean sealing surfaces on the guide frame as shown in the illustration.
- Sealant bead thickness: 2.0 mm
-- Apply sealant beads -1 through 3- to the clean sealing surfaces on the guide frame as shown in the illustration.
- Sealant bead thickness: 2.5 mm.
The guide frame must be installed within five minutes after applying the sealant.
-- Place the guide frame on the cylinder head.
-- Install the Locating Pins:T40116 into the guide frame and cylinder head.
-- Tighten the camshaft guide frame bolts. Refer to Figure.
After installing the guide frame, let the sealant harden for approximately 30 minutes.
-- Remove any oil and grease from the hole for the plug in the cylinder head.
-- Coat the outer edge of the plug -arrow- with sealant. Refer to Parts Information.
-- Drive in the sealing plugs until they are flush.
-- Remove the Locating Pins:T40116 with the Injector/Combustion Chamber Seal Tool Set - Sliding Hammer:T10133/3 .
Install in reverse order of removal, Note The Following:
-- Install the Camshaft Adjustment Valve 1 -N205- / Camshaft Adjustment Valve 2 -N208-. Refer to OVERVIEW - CYLINDER HEAD .
-- Install the high pressure pump motor housing and the high pressure pump. Refer to HIGH PRESSURE PUMP, REMOVING AND INSTALLING .
-- Install the vacuum pump. Refer to appropriate service information .
-- Position the camshaft timing chain on the camshafts. Refer to CAMSHAFT TIMING CHAIN, REMOVING AND INSTALLING .
Risk of damaging the valves and piston heads after working on valve train.
- The motor must not be started for about 30 minutes after installing camshafts because the hydraulic equalization elements must seat themselves.
- To ensure valves do not strike pistons when starting, carefully rotate engine at least two full revolutions.