Overview - VALVETRAIN: Notes
WARNING: This page is about a different car, the 2015 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
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 width of max. 0.3 mm, or only the first 4 threads of the spark plug threads are cracked.
After installing new hydraulic valve lifters, the engine may not be started for approximately 30 minutes. Otherwise the valves will impact the pistons.
Turn over the engine carefully at least two turns after working on the valvetrain. This assures the valve do not strike the piston when starting the engine.
- Bolt
- 100 Nm
- Camshaft Sprocket
- Seal
- Replacing. Refer to CAMSHAFT SEAL, REMOVING AND INSTALLING .
- Woodruff Key
- Make sure it is secure
- Bolt
- 20 Nm
- Bearing Cap
- Installed position. Refer to Correct & Incorrect Bearing Cap Position
- Installation sequence. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Camshaft
- Axial play, checking. Refer to Checking Axial Play For Camshaft .
- Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING .
- Check radial clearance with Plastigauge®
Wear limit: 0.1 mm Run-out: max. 0.05 mm
- Hydraulic Valve Lifter
- Do not interchange
- With hydraulic valve clearance compensation
- Checking. Refer to HYDRAULIC ADJUSTING ELEMENTS, CHECKING .
- Place on running surface when setting down
- Before installing, check axial play of camshafts. Refer to Checking Axial Play For Camshaft .
- Lubricate contact surface
- Valve Retainers
- Upper Valve Spring Retainer
- Valve Spring
- Removing and installing:
- Cylinder head removed using Valve Spring Compressor :2037
- Cylinder head installed. Refer to VALVE STEM SEALS, REMOVING AND INSTALLING .
- Valve Stem Seal
- Replacing. Refer to VALVE STEM SEALS, REMOVING AND INSTALLING .
- Valve Guide
- Checking. Refer to VALVE GUIDES, CHECKING .
- Replacing. Refer to VALVE GUIDES, REPLACING .
- Repair guide with shoulder
- Cylinder Head
- Resurfacing sealing surfaces. Refer to Cylinder Head, Sealing Surface, Resurfacing .
- Valve Seats, Reworking. Refer to VALVE SEATS, REWORKING .
- Valves
- Do not rework, only lapping is permitted
- Valve dimensions. Refer to Valves Dimensions
- Rear Toothed Belt Guard
- Bolt
- 20 Nm
- Camshaft Position Sensor -G40-