Valve train, servicing: Notes
WARNING: This page is about a different car, the 1999 Volkswagen Jetta, 1998 Volkswagen Jetta, 1997 Volkswagen Jetta, 1996 Volkswagen Passat, and 1996 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 may be used without reducing engine life, provided the cracks are small and not more than 0.5 mm (0.020 in.) wide.
The following list pertains to Fig 1.
- Bearing caps
- Installation position, see Figure
- Installation sequence, see CAMSHAFT, REMOVING AND INSTALLING
- 20 Nm (15 ft lb)
- Camshaft
- Checking axial clearance Figure
- Removing and installing, see CAMSHAFT, REMOVING AND INSTALLING
- Check radial clearance, with Plastigage.
- Wear limit: 0.11 mm (0.0043 in.)
- Run-out: max. 0.01 mm (0.0004 in.)
- Identification and valve timing, see Figure
- Hydraulic lifter
- Do not interchange
- Has hydraulic valve clearance compensation
- Checking, see HYDRAULIC LIFTERS, CHECKING
- Store with cam contact surface facing downward
- Check camshaft axial clearance before installing, see Figure
- Oil contact surfaces before assembling
- Valve keepers
- Valve spring seat, upper
- Valve spring, outer
- Removing and installing, see VALVE STEM SEALS, REPLACING
- Cylinder head removed, use 2037 valve spring compressor
- Valve spring, inner
- Removing and installing, see VALVE STEM SEALS, REPLACING
- Cylinder head removed, use 2037 valve spring compressor
- Valve stem seal
- Replacing, see VALVE STEM SEALS, REPLACING
- Valve spring seat, lower
- Remove and install using 3047A slide hammer
- Valve guide
- Checking, see VALVE GUIDES, CHECKING
- Replacing, see VALVE GUIDES, REPLACING
- Replacement part has collar
- Oil seal
- Use engine oil to lightly oil sealing lip, do not use grease
- To remove and install, remove bearing cap
Toothed belt, removing and installing
- Engine code 1Z, see TOOTHED BELT, REMOVING AND INSTALLING (ENGINE CODE AAZ 09.94 and up) .
- Engine code AHU, see Toothed belt, removing and installing (engine codes AAZ UP TO 10.94, 1Z, AHU) .
- Cylinder head
- See Note, VALVE TRAIN, SERVICING
- Valve seats, refacing, see VALVE SEATS, REFACING
- Valves
- Valve dimensions -->Figure
- Swirl chamber
- Replace if damaged
- Replacing, see SWIRL CHAMBERS, REPLACING
- Lower sealing cone