Camshaft: Service and Repair
Camshaft, Removing and Installing
Special tools
^ 3415 Counter support
^ V.A.G 1331 Torque wrench 5 to 50 Nm (3.7 to 37 ft. lbs.), or equivalent
^ V.A.G 1332 Torque wrench 40 to 200 Nm (30 to 148 ft. lbs.), or equivalent
^ AMV 174 004 01 sealant
Removing
- Remove intake manifold upper part:
Note:
- Seal the open portions of the lower intake manifold against dirt etc. with clean shop rags.
- Remove camshaft drive belt guard upper section.
- Set camshaft sprocket to cyl. 1 TDC by turning the crankshaft.
^ Mark on camshaft sprocket must align with arrow on toothed belt guard.
- Release tensioning roller and take toothed belt off camshaft sprocket.
- Turn crankshaft back slightly.
- Remove camshaft sprocket using 3415 counter-hold (Remove bolts from holes -arrows- before using tool).
- Remove woodruff key from camshaft.
- Remove valve cover.
- First remove bearing caps 5, 1 and 3, then loosen bearing caps 2 and 4 alternately and diagonally.
Installing
Conditions
^ Pistons must not be positioned at TDC.
Note:
^ When installing the camshaft No. 1 cylinder cam lobes must point upward.
^ When installing the bearing cap note offset, before installing camshaft fit bearing caps and determine fitting position.
- Oil camshaft contact surfaces.
- Install camshaft.
- Tighten bearing caps 2 and 4 alternately and diagonally.
Tightening torque: 20 Nm (15 ft. lbs.)
- Lightly coat bearing cap 1 contact surfaces with sealant AMV 174 004 01.
- Install bearing caps 3, 1 and 5 and tighten.
Tightening torque: 20 Nm (15 ft. lbs.)
- Insert woodruff key in camshaft.
- Install camshaft sprocket and tighten by counterholding sprocket using 3415 counter-hold (Remove bolts from holes -arrows- before using tool).
Tightening torque: 100 Nm (74 ft. lbs.)
Note:
- Assembly is basically a reverse of the disassembly procedure.
Note:
- When new lifters have been installed the engine must not be started for about 30 minutes. Hydraulic compensation elements must settle (otherwise valves will strike pistons).