Installing Camshafts

WM 150523 Installing camshafts








Installing camshafts

Installing camshafts





Installation position of camshafts

Information:
Ensure the bearing caps are correctly positioned and allocated.
Turn the crankshaft to about 30° before TDC cylinder 1 so that the valves and pistons are not damaged when the camshaft bearing caps are being tightened!

1. Remove locating pin 9595/1 from bore in crankshaft gearwheel -see Figure-. Using a socket 9714, turn the crankshaft until it is located 30° before TDC of cylinder 1.





Fixing the crankshaft

2. Apply a layer of engine oil to the running surfaces of camshaft bearings and bearing caps.

Information:
Place the camshafts in such a way that the cams are positioned as shown below!

Information:
The camshafts of the turbocharged engine have a blue color identification, the camshafts of the naturally aspirated engine a white color identification.

3. Place camshafts as shown in -Illustration-. When doing so, pay particular attention to the way the cams are positioned in relation to each other.





Installation position of cams

1 - Cam position cylinder 6
2 - Cam position cylinder 2 (A) and cylinder 3 (B)
D - Cam position cylinder bank 5 - 8 exhaust side
C - Cam position cylinder bank 5 - 8 inlet side
B - Cam position cylinder bank 1 - 4 inlet side
A - Cam position cylinder bank 1 - 4 exhaust side

4. Put oiled bearing caps onto the camshaft bearings. The matching number of the bearing caps must correspond to the camshaft housing. For each cylinder, the bearing caps are numbered consecutively from the front (timing chain side) -B-. The designation of the bearing cap and matching number can be read from the exhaust side -A-.





Designation and matching numbers of bearing caps

A - xxxx Camshaft housing bearing cap matching number
B - Bearing cap A/1 Bearing cap consecutive numbering exhaust cylinder 1
B - Bearing cap A/2-1 Bearing cap consecutive numbering exhaust between cylinders 1 and 2
B - Bearing cap A/3-2 Bearing cap consecutive numbering exhaust between cylinders 3 and 2 etc.
B - Bearing cap E/1 Bearing cap consecutive numbering inlet cylinder 1 etc

Information:
As of model year 2005, the first camshaft bearing cap has two standard bores for securing the hydraulic valve (two M6 x 60 screws) -1-. An additional oil strainer is fitted under the hydraulic valve.





Camshaft adjustment valve

5. Fit bearing cap. The tightening sequence must be strictly observed - Tightening torque: 10 Nm (7.5 ftlb.) -Tightening sequence-.





Camshaft bearing cap tightening sequence

6. Fit oil feed housing of inlet camshaft. To do this, slide the well-oiled oil feed housing over the plain compression rings of the camshaft - Tightening torque: 10 Nm (7.5 ftlb.).