Camshaft and Oil Pump Timing Chains
Camshaft and Oil Pump Timing Chains
Special tools, testers and auxiliary items required
• Torque Wrench (5-50 Nm) (V.A.G 1331)
• Torque Wrench (40-200 Nm) (V.A.G 1332)
• Camshaft Bar (T10068 A)
• Adjustment Tool (T10363)
• Counter-Holder Tool (T10069) (for engine code BLV)
• Silicone Adhesive Sealant (D 176 501 A1)
Requirements:
• The transmission is removed
• The drive plate is removed
• The oil pan is removed
• The sealing flange is removed
• The cylinder head cover is removed
Procedure
When doing any repair work, especially in the engine compartment, pay attention to the following due to clearance issues:
• Route all lines and wires in their original locations.
• Ensure sufficient clearance to all moving or hot components.
• The adjustments required depend on how far the engine has been disassembled. The oil pan may be installed only after the sealing flange has been installed.
Installing the timing chain and the chain tensioner with tensioning rail for the oil pump:
- First, set the crankshaft to Top Dead Center (TDC) for cylinder 1. To do so, the milled tooth on crankshaft sprocket must align with the main bearing cap joint - arrow -.
- Install both pins without collars for guide rail and tighten them to 10 Nm. Place the guide rail on the pins.
- Now, set the oil pump shaft - 1 - with the flat side - arrow - horizontal, to the mark - 2 - on the oil pump.
• Note the rotation direction of the used timing chain. Refer to => [ Identifying the Timing Chains ] Chain Drive Overview.
- Install the timing chain into the guide rail and on the crankshaft sprocket.
- Install the large chain sprocket into the timing chain so that the tab on the chain sprocket aligns with the mark on the cylinder block - B -.
- Mount the chain sprocket onto the oil pump shaft.
During installation make sure that the timing chain runs completely straight in the guide rail from the crankshaft to the oil pump shaft.
• The milled drive sprocket tooth on the crankshaft must align with main bearing cap joint - arrow A -.
• The tab on the oil pump chain sprocket must align with the mark - arrow B - behind it.
- If the large chain sprocket cannot be installed, rotate the oil pump slightly.
- Now, install the chain tensioner.
- Release the locking splines of the chain tensioner - A - with a small screwdriver and press the tensioning rail against the chain tensioner.
- Install the chain tensioner in this position and tighten the bolts - arrow - to 8 Nm.
- If the cylinder head has been removed, install it now. Refer to => [ Cylinder Head ] Cylinder Head.
- Install the camshaft bar (T10068 A) into both camshaft grooves.
- Now, guide the camshaft timing chain through the opening in the cylinder head/cylinder head gasket from above.
- Insert the small chain sprocket with the chain installed, into the recess - arrow - and install the bolt hand tight.
- Secure the vibration damper using the counter-holder tool (T10069).
- Using a new bolt, tighten both chain sprockets to the oil pump to 60 Nm + an additional 90° (1/4) turn. Use strength category 10.9 bolts only.
• Be aware that all chain sprocket bolts must be replaced.
- Install the guide rail - 2 - through the opening in the cylinder head and secure it with the pin - 1 - and bolt - 3 -.
- Install the tensioning rail - 4 - and secure it to the cylinder block with the pin - 5 -.
- Install the chain sprocket - 1 - with the chain mounted. Make sure the chain lies "taut" on the guide rail.
• The notch - arrow - must face upward.
- Coat the vacuum pump driveshaft - 4 - with clean engine oil and install it.
- Make sure that the alignment bushing - 5 - is inserted. It is used to secure the adjustment tool (T10363).
- Also, secure the position of the high pressure pump chain sprocket using the adjustment tool (T10363). The mark - A - on the high pressure pump drive sprocket must be at the top.
Install the camshaft adjusters. Refer to => [ Camshaft Adjuster with Timing Chain, Installing ] Camshaft Adjuster with Timing Chain, Installing