2.0L - Cylinder Head, Valvetrain - Engine Code(s): Bpy: Overview Volkswagen Eos I

CYLINDER HEAD OVERVIEW

Note. When installing a replacement cylinder head, all of the contact surfaces between the supports, roller rocker arms and cam running surfaces on the camshaft must be lubricated before installing the cylinder head cover. The plastic protectors installed to protect the open valves must only be removed immediately before installing the cylinder head. Replace the cylinder head bolts. If the cylinder head is going to be replaced, then it is also necessary to replace all the coolant.

Scheme 124

1. Bolt 10 Nm
2. Cylinder Head Cover Removing and installing, refer to «CYLINDER HEAD COVER»(ref-475573-S31587251922012052300000) .
3. Gasket Replace if damaged or leaking.
4. Crankcase Ventilation Valve
5. Cap
6. Gasket Replace if damaged or leaking.
7. Bolt 4 Nm
8. Cylinder Head Cover Seal Replace if damaged or leaking.
9. Vacuum Pump
10. Bolt 4 Nm
11. Camshaft Adjustment Valve 1 -N205- Removing and installing, refer to «Camshaft Adjustment Valve 1 -N205»(ref-475573-S08714895482012052300000) .
12. Seal Always replace.
13. Bolt 10 Nm
14. Wire Bracket
15. Seal Replace if damaged or leaking.
16. Bolt 10 Nm
17. Housing
18. Gasket Always replace.
19. Transport Strap
20. Bolt 25 Nm
21. Stud Bolt 10 Nm For the intake manifold.
22. Partition Plate
23. Cylinder Head Gasket Always replace. Note the installed position: The part number faces the cylinder head.
24. Bolt 10 Nm
25. Camshaft Position Sensor -G40
26. Seal
27. Stud Bolt 10 Nm For the toothed belt tensioner.
28. Stud Bolt 20 Nm For the exhaust manifold.
29. Bolt 40 Nm + 180° (1/2) additional turn. Always replace. Follow the loosening/tightening sequence. Refer to «CYLINDER HEAD»(ref-475573-S17511267222012052300000) .

Checking the Cylinder Head for Distortion

Check the cylinder head at multiple points for distortion using a straight edge 500 mm -VAS 6075- and feeler gauges.

Scheme 125

1. Maximum permissible distortion: 0.1 mm

Replace the cylinder head if the maximum distortion is exceeded.

VALVETRAIN OVERVIEW

Note. Cylinder heads with cracks between the valve seats, or between the valve seat and the spark plug threads, can continue to be used without reducing the service life, as long as the cracks have a Max. width of 0.3 mm, or only the first 4 threads of the spark plug threads are cracked. The cylinder head and guide frame must be replaced together. Do not start the engine for approximately 30 minutes after installing the camshafts. The hydraulic lash adjusters must seat themselves (otherwise the valves will crash into the pistons). After working on the valvetrain and lifters, carefully rotate the crankshaft by hand at least 2 full revolutions before starting to be sure that valves do not strike the pistons. Always replace the gaskets and seals.

Scheme 126

1. Bolt 50 Nm + 180° (1/2) additional turn. Always replace Use the retainer -3036- to loosen and tighten.
2. Camshaft Sprocket Use the retainer -3036- to loosen and tighten.
3. Seal Removing and installing, refer to «EXHAUST CAMSHAFT SEAL»(ref-475573-S26045345102012052300000) .
4. Cylinder Head
5. Valve Guide Checking, refer to «VALVE GUIDE, CHECKING»(ref-475573-S18851096442012052300000) .
6. Valve Stem Seal Removing and installing, refer to «VALVE STEM SEALS»(ref-475573-S19019116472012052300000) .
7. Valve Spring
8. Spring Seat
9. Valve Retainer
10. Hydraulic Lash Adjuster Do not interchange. Lubricate the contact surface.
11. Woodruff Key Make sure it is secure.
12. Exhaust Camshaft Check the radial clearance using Plastigage (roller rocker arm removed) wear limit: 0.1 mm. Runout: Max. 0.035 mm.
13. Guide Frame With integrated camshaft bearings. Clean the sealing surface, reworking is not permitted. Remove the old sealant residue.
14. Bolt 8 Nm + 90° (1/4) additional turn. Always replace.
15. Camshaft Adjuster Removing and installing, refer to «CAMSHAFT ADJUSTER»(ref-475573-S13820040762012052300000) .
16. Bolt 20 Nm + 45° (1/8) additional turn. Always replace. Use the camshaft clamp -T10252- to loosen and tighten.
17. Intake Camshaft Check the radial clearance with Plastigage, Wear limit: 0.1 mm. Runout: Max. 0.035 mm.
18. Chain Tensioner Before removing, secure using the locking pin -T10115-.
19. Drive Chain Removing and installing, refer to «CAMSHAFT ADJUSTER»(ref-475573-S13820040762012052300000) . Check for wear
20. Bolt 10 Nm
21. Bolt 10 Nm
22. Camshaft Position Sensor -G40
23. Exhaust Valve Do not rework, only lapping is permitted. For the correct valve dimensions, refer to «VALVE DIMENSIONS»(ref-475573-S00317647032012052300000) . Valve guide, checking. Refer to «VALVE GUIDE, CHECKING»(ref-475573-S18851096442012052300000) .
24. Intake Valve Do not rework, only lapping is permitted. For the correct valve dimensions, refer to «VALVE DIMENSIONS»(ref-475573-S00317647032012052300000) . Valve guide, checking. Refer to «VALVE GUIDE, CHECKING»(ref-475573-S18851096442012052300000) .
25. Cap Always replace. Removing: Insert a screwdriver into the center and pry out. Installing: Do not use sealant, press in 1 to 2 mm using the thrust piece -3334-.