Work sequence
WARNING: This page is about a different variant/trim than selected.
NOTE:
- Valve lifters must be replaced as units (they cannot be adjusted or repaired).
- Intermittent valve noises during engine startup are normal.
- Start engine and let it run until coolant fan has turned on once.
- Increase engine speed to approximately 2500 rpm for 2 minutes.
If the hydraulic lifters continue to make noise, find the faulty lifter as follows:
- Remove cylinder head cover, refer to Cylinder head cover, removing and installing .
- Turn camshaft at vibration damper fastening bolt clockwise until valve lifter cams being tested are in upper position.
- Determine clearance between cams and valve lifters.
- If clearance is greater than 0.2 mm, replace valve lifters. If clearance is less then 0.1 mm or no clearance is determined, continue test as follows:
- Push valve lifters downward with a wooden or plastic wedge. If you can feel unrestricted motion of more than 0.2 mm until valve opens, replace lifters.
NOTE:
- After installing new valve lifters, do not start the engine until after about 30 minutes. Hydraulic balancing elements must become properly seated (otherwise, valves will make contact with the piston).