Camshaft Timing Chains, Removing from Camshafts
Camshaft Timing Chains, Removing from Camshafts
Special tools, testers and auxiliary items required
• Torque Wrench (V.A.G 1332)
• Open Ring Spanner insert, Af 24 mm (V.A.G 1332/9)
• Multi-Point Socket (T10035)
• Counter Hold Tool Touareg V10 (T10172)
• Adapter (T40058)
• Locking Pin (T40069)
• Locking Pin (T40071), qty. 2
• Camshaft Clamp (T40133), qty. 2
Removing
• The camshaft timing chains remain on the engine in the following description.
- Remove the cylinder head covers. Refer to => [ Left Cylinder Head Cover ] Left Cylinder Head Cover or => [ Right Cylinder Head Cover ] Right Cylinder Head Cover.
- Remove the left and right timing chain covers. Refer to => [ Left and Right Timing Chain Covers ] Left and Right Timing Chain Covers.
- Insert the (T40058) guide pins as follows:
• The large diameter - arrow 1 - faces the engine.
• Small diameter - arrow 2 - points to adapter.
- Turn the crankshaft in the direction of engine rotation - arrow - to "TDC" using the (T40058).
• The threaded holes - arrows - in the camshafts must face upward.
- Install the (T40133) in both cylinder heads and tighten the bolts - arrows - to 25 Nm.
• The illustration shows the left cylinder head.
- Remove the locking bolt - arrow - for the "TDC" marking from the upper section of the oil pan.
- Install the (T40069) in the hole and tighten to 20 Nm. Turn the crankshaft back slightly to completely center the bolt, if necessary.
- Press the left camshaft timing chain tensioner guide rails in as far as the stop using a screwdriver - 1 - and secure the chain tensioner with a (T40071).
• The toothed belt tensioner is lubricated with oil and should only be compressed slowly by applying constant pressure.
- Press the right camshaft timing chain tensioner guide rails in as far as the stop using a screwdriver - 1 - and secure the chain tensioner with a (T40071).
• The toothed belt tensioner is lubricated with oil and should only be compressed slowly by applying constant pressure.
CAUTION!
The camshaft could be damaged.
• Do not use the (T40133) to counter hold when loosening the camshaft adjuster bolts - 1 -.
- To counter hold at the affected camshaft adjuster, position the (T10172) with pins (T10172/2) and loosen using the (T10035).
- Mark the installation position of the camshaft adjuster with paint for installation later.
CAUTION!
The engine could be destroyed.
• To prevent small parts from accidentally entering the engine through the opening in the timing chain compartment, cover the opening with a clean cloth.
- Remove bolts - 1 - and - 2 - on the left cylinder head and remove both camshaft adjusters.
- Mark the installation position of the camshaft adjuster with paint for installation later.
- Remove bolts - 1 - and - 2 - on the right cylinder head and remove both camshaft adjusters.
Installing
• Tightening specifications, refer to => [ Camshaft Timing Chains Assembly Overview ] Camshaft Timing Chains Assembly Overview or => [ Marking Locking Bolt - Tightening
Specification ] Oil Pan Upper and Lower Sections, Oil Pump and Oil Cooler Assembly Overview.
• Replace bolts which have been tightened to torque.
• Replace the O-ring for the "TDC" marking locking bolt.
CAUTION!
Risk of damaging valves and piston crowns.
• If camshafts are rotated, crankshaft may not rest with any piston at "TDC".
• Drive chain for timing mechanism installed. Refer to => [ Timing Mechanism Drive Chain ] Timing Mechanism Drive Chain.
• Secure the crankshaft in the "TDC" position using the (T40069).
• (T40133) mounted on both cylinder heads and fastened to 25 Nm - arrows -.
• The illustration shows the left cylinder head.
CAUTION!
The engine could be damaged.
• For the following steps, only install the camshaft adjuster so the grooves - 1 - and - 4 - are aligned with the windows (beveled surfaces) - 2 - and - 3 -.
• Reinstall camshaft adjuster on left cylinder head according to the mark applied during removal.
- Position the left camshaft timing chain on the drive sprocket and the camshaft adjuster and loosely install bolts - 1 - and - 2 -.
• Both camshaft adjusters must be able to still be rotated on camshaft and must not tip.
- Remove the (T40071).
• Reinstall camshaft adjuster on right cylinder head according to the mark applied during removal.
- Position the right camshaft timing chain on the drive sprocket and the camshaft adjuster and loosely install bolts - 1 - and - 2 -.
• Both camshaft adjusters must be able to still be rotated on camshaft and must not tip.
- Remove the (T40071).
- Position the (T10172) with the (T10172/2) on the left intake camshaft adjuster.
- Have a second technician hold the camshaft timing chain tensioned by pressing the counter hold tool in direction of - arrow -.
- Tighten the bolts as follows while the camshaft adjuster is still held under tension.
- Position the (T10172) with the (T10172/2) on the right exhaust camshaft adjuster.
- Have a second technician hold the camshaft timing chain tensioned by pressing the counterhold tool in direction of - arrow -.
- Tighten the bolts as follows while the camshaft adjuster is still held under tension.
- Remove the (T40133) on both cylinder heads - arrows -.
• The illustration shows the left cylinder head.
- Tighten the camshaft adjuster bolts on the left cylinder head as follows:
- Tighten the camshaft adjuster bolts on the right cylinder head as follows:
- Remove the (T40069).
Engine rotation direction
• If rotated unintentionally beyond "TDC", crankshaft must be rotated back approximately 30° and set to "TDC" again.
• The threaded holes - arrows - in the camshafts must face upward.
- Install the (T40133) in both cylinder heads and tighten the bolts - arrows - to 25 Nm.
- Install the (T40069) directly in the hole.
• The (T40069) must engage in the locating hole of the crankshaft - 1 -, otherwise repeat the adjustment.
- Remove the camshaft locating pins on both cylinder heads.
- Remove the (T40069).
The rest of the installation is in reverse order of removal, note the following:
- Install the left and right timing chain covers. Refer to => [ Left and Right Timing Chain Covers ] Left and Right Timing Chain Covers.
- Install the cylinder head covers. Refer to => [ Left Cylinder Head Cover ] Left Cylinder Head Cover or => [ Right Cylinder Head Cover ] Right Cylinder Head Cover.