Removal And Installation: Camshafts: Installing
Tightening specifications:
Replace the seals and sealing plugs.
- Secure crankshaft -1- in TDC position using T40069.
- The hydraulic adjusting elements and roller rocker lever are inserted.
Risk of contaminating lubricating system and bearing.
- Cover open parts of the engine.
Danger of eye injury.
- Wear protective goggles.
-- Remove the sealant residue on the cylinder head and guide frame and the upper oil pan, for example using a rotating plastic brush.
-- Clean any oil or grease off the sealing surfaces.
-- Check the screen -arrow- for dirt; clean it if necessary.
-- Oil running surfaces of both camshafts.
-- 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.
-- Install the T40133 in both cylinder heads and tighten -arrows- to 25 Nm.
Note the expiration date of the sealing compound.
-- Cut the tube nozzle at the front marking (nozzle diameter approximately 2 mm).
-- Rotate the guide frame again.
The lubrication system could be plugged 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.
- Thickness of sealant beads: 2.0 mm.
-- Apply sealant beads -1 through 3- to the clean sealing surfaces on the guide frame as shown in the illustration.
- Thickness of sealant beads: 2.5 mm.
The guide frame must be installed within 5 minutes after applying the sealant.
-- Place the guide frame on the cylinder head.
-- Insert the T40116 in 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.
-- Clean the hole in the cylinder head of any oil and grease.
-- Coat the outer circumference of the sealing plug -arrow- with sealant.
-- Drive in the sealing plugs until they are flush.
-- Remove the T40116 with the T10133/3.
Install in reverse order of removal paying attention to the following:
-- Install the high pressure pump motor housing and the high pressure pump. Refer to Removal and Installation .
-- Install the vacuum pump. Refer to OVERVIEW - VACUUM PUMP .
-- Position the camshaft timing chain on the camshafts. Refer to CAMSHAFT TIMING CHAINS, REMOVING FROM CAMSHAFTS .
Risk of damaging 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 2 full revolutions.