Camshaft Timing Chains, Removing from Camshafts
Camshaft Timing Chains, Removing from Camshafts
Special tools, testers and auxiliary items required
• Torque Wrench 40-200 Nm (V.A.G 1332)
• Open Ring Spanner Insert, AF 24 mm (V.A.G 1332/9)
• Socket (T40058)
• Camshaft Clamp (T40070) , quantity: 2
• Locking Pin (T40071) , quantity: 2
• Key (T40079)
• TDC Locking Pin (T40227)
Removing
• The camshaft timing chains stay on the engine in the following description.
- Remove the respective cylinder head cover. Refer to => [ Cylinder Head Cover ] Service and Repair.
- Remove the respective timing chain cover. Refer to => [ Left Timing Chain Cover ] Left Timing Chain Cover or => [ Right Timing Chain Cover ] Right Timing Chain Cover.
- Insert the (T40058) guide pins as follows:
• The large diameter - arrow 1 - faces the engine.
• Small diameter - arrow 2 - points to adapter.
- Use the (T40058) to rotate the crankshaft in direction of engine rotation to "TDC".
• The markings - 1 - on the vibration damper and - 2 - on the cylinder block must line up.
• The threaded holes - arrows - in the camshafts must face upward.
- (T40070) mounted on both cylinder heads and tightened to 25 Nm - arrows -.
• The (T40070) is correctly positioned when the holes for the cylinder head bolts remain free.
- Install the (T40227) through the hole inside the vibration damper and all the way into the cylinder block. If necessary, move the crankshaft back and forth slightly to center the bolt.
- 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.
- Mark the installation position of the camshaft adjuster with paint for installation later.
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 Overview ] Camshaft Timing Chains Overview.
• Replace bolts which have been tightened to an additional torque.
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.
• Lock the crankshaft with the (T40227) in the "TDC" position.
• (T40070) mounted on both cylinder heads and tightened to 25 Nm - arrows -.
- Install the camshaft adjuster on the left cylinder head according to the markings applied during removal.
- Position the 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).
- Install the camshaft adjuster on the right cylinder head according to the markings applied during removal.
- Position the 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).
- Place the (T40079) on the intake camshaft adjuster on the left cylinder head.
- Place the (V.A.G 1332) with (V.A.G 1332/9) on the (T40079).
- Have a second technician tension the camshaft adjuster in the direction of the - arrow - to 40 Nm.
- Tighten the bolts as follows while the camshaft adjuster is still held under tension.
- Position the (T40079) on the exhaust camshaft adjuster on the right cylinder head.
- Place the (V.A.G 1332) with (V.A.G 1332/9) on the (T40079).
- Have a second technician tension the camshaft adjuster in the direction of the - arrow - to 40 Nm.
- Tighten the bolts as follows while the camshaft adjuster is still held under tension.
- Remove the (T40079).
- Remove the (T40070) on both cylinder heads - arrows -.
- 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 (T40227).
- Using the (T40058) , turn the crankshaft two turns in the direction of engine rotation - arrow - until it is back at "TDC".
• If it is accidentally rotated beyond "TDC", rotate it back approximately 30° and set it to "TDC" again.
• The markings - 1 - on the vibration damper and - 2 - on the cylinder block must line up.
• The threaded holes - arrows - in the camshafts must face upward.
- (T40070) mounted on both cylinder heads and tightened to 25 Nm - arrows -.
• The (T40070) is correctly positioned when the holes for the cylinder head bolts remain free.
- Install the (T40227) through the hole inside the vibration damper and all the way into the cylinder block.
• The (T40227) must engage into he hole in the cylinder; if not, repeat the adjustment.
- Remove the camshaft locating pins on both cylinder heads.
- Remove the (T40227).
The rest of the installation is performed in reverse order of removal, noting the following:
- Install the timing chain cover. Refer to => [ Left Timing Chain Cover ] Left Timing Chain Cover or => [ Right Timing Chain Cover ] Right Timing Chain Cover.
- Install cylinder head cover. Refer to => [ Cylinder Head Cover ] Service and Repair.