Overview - Valve Train, 1.8L Engine
The cylinder head and the cylinder head cover must be replaced together.
Do not start the engine for approximately 30 minutes after installing the camshafts. The hydraulic equalization elements 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 two full revolutions before starting to be sure that valves do not strike the pistons.
- Exhaust valve
- Do not rework, only grinding is permitted
- Valve dimensions. Refer to VALVE DIMENSIONS .
- Valve guides, checking. Refer to VALVE GUIDES, CHECKING .
- Cylinder Head
- Valve Guide
- Checking. Refer to VALVE GUIDES, CHECKING .
- Valve stem seal
- Replacing: cylinder head installed VALVE STEM SEALS, REMOVING AND INSTALLING, CYLINDER HEAD INSTALLED , cylinder head removed VALVE SHAFT SEALS, REMOVING AND INSTALLING, CYLINDER REMOVED
- Valve spring
- Valve spring retainer
- Valve keepers
- hydraulic adjusting element
- with roller rocker lever
- Do not interchange
- Lubricate contact surface
- Exhaust camshaft
- Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING, 1.8L ENGINE .
- Check radial clearance using Plastigage (roller rocker lever removed)
- Radial clearance: 0.024 to 0.066 mm
- Run-out: maximum 0.04 mm
- Cylinder Head Cover
- With integrated camshaft bearings
- Clean sealing surface, reworking is not permitted.
- Remove old sealant residue.
- Bolt
- O-Ring
- Replace
- Coat with engine oil
- Sealing Plugs
- Intake camshaft
- Removing and installing. Refer to CAMSHAFT, REMOVING AND INSTALLING, 1.8L ENGINE .
- Check radial clearance using Plastigage (roller rocker lever removed)
- Radial clearance: 0.024 to 0.066 mm
- Run-out: maximum 0.04 mm
- Cap
- Replace
- Removing: with the cylinder head cover installed, pierce through one side of the cover with an awl and pry it out
- Installing, refer to INSTALLING . Drive the cap -1- in without sealant using the Seal Installer - Selector Shaft Oil Seal T10174 (See Figure).
- Intake valve
- Do not rework, only grinding is permitted
- Valve dimensions. Refer to VALVE DIMENSIONS .
- Valve guides, checking. Refer to VALVE GUIDES, CHECKING .
-- Loosen the cylinder head cover in the order 1 through 6.
-- Replace the bolts.
-- Hand-tighten bolts in several steps in -1 to 6- sequence.
-- Tighten the bolts in a -1 to 6- sequence to 8 Nm using a torque wrench.
-- Tighten the bolts an additional 90° using a rigid wrench in the sequence -1 to 6-.
Make sure the cylinder head cover is not tilted.