Camshaft Timing Chains, Removing From Camshafts
Camshaft Timing Chains, Removing from Camshafts
Special tools, testers and auxiliary items required
• Crankshaft Holder (3242)
• Torque Wrench (V.A.G 1332)
• Open Ring Spanner Insert, AF 24 mm (V.A.G 1332/9)
• Adapter (T40058)
• Camshaft Clamp (T40070), quantity: 2
• Locking Pin (T40071), quantity: 2
• Key (T40079)
Removing
• According to the following description, the timing chains for camshafts remain on engine.
- Remove left and right timing chain covers. Refer to => [ Left and Right Timing Chain Covers ] Left and Right Timing Chain Covers.
- Remove the cylinder head cover. Refer to => [ Left Cylinder Head Cover ] Left Cylinder Head Cover, => [ Right Cylinder Head Cover ] Right Cylinder Head Cover.
- Insert the (T40058) guide pins as follows:
• Small diameter - arrow 1 - points to engine.
• Large diameter - arrow 2 - points to socket.
- Using (T40058), rotate crankshaft in direction of engine rotation - arrow - to "TDC".
• The threaded holes - arrows - in the camshafts must face upward.
- Mount the (T40070) on both cylinder heads and tighten the bolts - arrows - to 25 Nm.
• The (T40070) is correctly positioned when the holes for the cylinder head bolts remain free.
- Remove locking bolt - arrow - from upper section of the oil pan.
- Screw (3242) into hole to 20 Nm, if necessary rotate crankshaft very slightly back and forth to completely center the holder.
- Press left camshaft timing chain tensioner glide track inward with a screwdriver - 1 - as far as stop and secure chain tensioner with (T40071).
• The toothed belt tensioner is lubricated with oil and should only be compressed slowly by applying constant pressure.
- Press right camshaft timing chain tensioner glide track inward with a screwdriver - 1 - as far as stop and secure chain tensioner with (T40071).
• The toothed belt tensioner is lubricated with oil and should only be compressed slowly by applying constant pressure.
- For re-installation, identify installation location of camshaft adjuster with paint.
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 left cylinder head and remove both camshaft adjusters.
- For re-installation, identify installation location of camshaft adjuster with paint.
- Remove bolts - 1 - and - 2 - on right cylinder head and remove both camshaft adjusters.
Installing
• Tightening specifications, refer to => [ Camshaft Timing Chain Assembly Overview ] Camshaft Timing Chain Assembly Overview, => [ Upper Oil Pan Section Assembly Overview ] Upper Oil Pan Section Assembly Overview.
• Replace bolts which have been tightened to torque.
• Replace locking bolt O-ring.
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 crankshaft in "TDC" position using (3242).
• (T40070) mounted on both cylinder heads and fastened to 25 Nm - arrows -.
• Reinstall left camshaft adjuster according to the mark applied during removal.
- Replace camshaft bolts.
- Place camshaft timing chain onto drive sprocket and onto camshaft adjusters and loosely thread in the bolts - 1 - and - 2 -.
• Both camshaft adjusters must be able to still be rotated on camshaft and must not tip.
- Remove (T40071).
- Reinstall camshaft adjuster on right cylinder head according to the mark applied during removal.
- Place camshaft timing chain onto drive sprocket and onto camshaft adjusters and loosely thread in the bolts - 1 - and - 2 -.
• Both camshaft adjusters must be able to still be rotated on camshaft and must not tip.
- Remove (T40071).
- Position (T40079) on intake camshaft adjuster at left cylinder head.
- Position (V.A.G 1332) with (V.A.G 1332/9) on (T40079).
- Have a second technician pre-tension camshaft adjuster to 40 Nm in direction of - arrow -.
- Tighten bolts as follows while camshaft adjuster is held under pre-tension:
- Position (T40079) on exhaust camshaft adjuster at right cylinder head.
- Position (V.A.G 1332) with (V.A.G 1332/9) on (T40079).
- Have a second technician pre-tension camshaft adjuster to 40 Nm in direction of - arrow -.
- Tighten bolts as follows while camshaft adjuster is held under pre-tension:
- Remove (T40079).
- Remove (T40070) on both cylinder heads - arrows -.
- Tighten camshaft adjuster bolts on left cylinder head as follows:
- Tighten camshaft adjuster bolts on right cylinder head as follows:
- Remove (3242).
- Using (T40058) turn crankshaft two complete rotations in direction of engine rotation - arrow - until crankshaft stands at "TDC" again.
• If rotated unintentionally beyond "TDC", turn back crankshaft again approximately 30° and set to "TDC" again.
• The threaded holes - arrows - in the camshafts must face upward.
- Mount the (T40070) to both cylinder heads and tighten the bolts - arrows - to 25 Nm.
• The (T40070) is correctly positioned when the holes for the cylinder head bolts remain free.
- Install (3242) in bore and tighten to 20 Nm.
• The (3242) must engage in the locating hole of the crankshaft - 1 -, otherwise repeat the adjustment.
- Remove camshaft locating tools on both cylinder heads.
- Remove (3242).
- Install "TDC" mark sealing plug with new seal in upper section of the oil pan.
The rest of the installation is in reverse order of removal, note the following:
- Install left and right timing chain covers. Refer to => [ Left and Right Timing Chain Covers ] Left and Right Timing Chain Covers.
- Install cylinder head cover. Refer to => [ Left Cylinder Head Cover ] Left Cylinder Head Cover, right => [ Right Cylinder Head Cover ] Right Cylinder Head Cover.