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Checking valve timing > < Chain drive

Polo Mk5

Assembly overview - timing chain
   
Assembly overview - timing chain
1 - Cylinder head with cylinder head cover
q   Remove and install cylinder head → Chapter.
q   Remove and install cylinder head cover → Chapter.
q   Sealing surface must not be reworked.
q   With integrated camshaft bearings.
q   Remove sealant residue.
  Caution
Cylinder head cover is sealed using 2 different sealants!
q   Apply sealant D 189 500 A1 and D 154 103 A1 before positioning.
q   When installing, insert vertically from above so that dowel pins fit into holes in cylinder head
2 - Cylinder block
  Caution
The crankshaft must not be removed. Even loosening the main bearing caps will cause deformation of the cylinder block bearing seats. This deformation will cause a reduction of the bearing clearance. Even if the bearing shells are not renewed bearing damage could occur due to a different bearing clearance.
If the bearing cap bolts are loosened, the cylinder block must be renewed complete with the crankshaft.
Measuring the main bearing clearance is not possible with normal workshop equipment.
q   Dismantle and assemble cylinder block → Chapter.
q   Dismantle and assemble pistons and conrods → Chapter
3 - Bottom ancillary bracket
q   For tensioning element and air conditioner compressor.
q   Remove and install → Chapter
q   Remove and install top ancillary bracket → Chapter
4 - 25 Nm
5 - Oil sump
q   Remove and install → Chapter
q   Clean sealing surface before fitting.
q   Install with silicone sealant D 176 600 A1.
6 - 13 Nm
7 - 150 Nm + turn 180° further.
q   Remove and install crankshaft pulley → Chapter.
q   Renew.
q   Contact surface for securing bolt must be free of oil and grease.
q   Oil threads before inserting.
q   Secure belt pulley against turning with counterhold tool -3415-.
q   The turning further angle can be measured with a commercial protractor.
8 - Belt pulley
q   With diamond coated washer (clipped onto belt pulley)
q   Observe tightening procedure → Chapter.
q   Contact surfaces must be free of oil and grease.
q   Secure belt pulley against turning with counterhold tool -3415-.
q   Remove and install poly V-belt → Chapter.
9 - Seal
q   Renew.
q   Remove and install → Chapter
10 - 50 Nm
11 - Engine support
q   For assembly mounting
12 - 20 Nm + turn 90° further
q   Renew.
13 - Chain sprocket
q   For oil pump drive.
q   Contact surfaces must be free of oil and grease.
q   Lock sprocket using counterhold -T10172-.
14 - Oil pump drive chain
q   Before removing, mark direction of rotation (installation position).
15 - Cover
16 - 5 Nm + turn 30° further
q   Bolt: M6x40
q   Tighten with torque wrench -VAS 6583-.
17 - 5 Nm + turn 30° further
q   Bolt: M6x20
q   Tighten with torque wrench -VAS 6583-.
18 - Bottom valve timing housing
q   Remove and install → Chapter
q   Install with sealant D 176 501 A1
19 - Bearing mounting
q   Specified torque. 18 Nm
20 - Guide rail
q   For timing chain.
21 - Bearing mounting
q   Specified torque. 18 Nm
22 - 50 Nm + turn 90° further
q   Renew.
23 - Tensioning plate
q   For timing chain.
24 - 8 Nm
  Caution
Observe tightening procedure!
Removing and installing top valve timing housing → Chapter
25 - Top valve timing housing
q   Install with sealant D 176 501 A1
  Caution
Observe tightening procedure!
Removing and installing top valve timing housing → Chapter
26 - Timing chain
  Note
t  Only in vehicles manufactured from June 2011:
t  If timing chain has been removed and installed or renewed, erase learnt values and adapt engine control unit → Vehicle diagnostic tester„Guided Functions“.
q   Remove and install → Chapter
27 - Chain sprocket
q   Lock sprocket using counterhold -T10172-.
28 - Chain tensioner
q   For timing chain.
q   Specified torque: 60 Nm
29 - Seal
q   Renew.

   

Checking valve timing > < Chain drive