Service manual

G420F(FE) Service Manual Chapter 3. Engine Mechanical System 85
Inspection
Camshaft
1. Check the camshaft journal for wear and if the
journal is seriously worn, replace the camshaft.
2. Check the cam lobe for damage and if the lobe is
severely damaged or worn, replace the camshaft.
Items Standard Limit
Intake 43 42.9
Cam
height
Exhaust 43 42.9
3. Check the cam surface for abnormal wear and
damage and replace it if necessary.
4. Check the cylinder head camshaft journal for
damage and if the surface is severely damaged,
replace the cylinder head assembly.
5. Lightly put the camshaft on the cylinder head as
shown in the illustration and after installing a dial
gauge towards shaft, check the endplay.
Camshaft endplay 0.1 ~ 0.2mm
Oil Seal
1. Check the oil seal surface for wear and if the seal
lip portion is worn, replace it.
2. Check the camshaft oil seal lip contact surface for
partial wear and replace it if necessary.
HLA(Hydraulic Lash Adjuster)
1. HLA O.D : Ø33(-0.025/-0.041)mm
2. How to remove noise when it heard from valve
1) Prior to engine warm-up, check that the engine
oil level is normal.
2) Warm-up the engine.
3) If the valve noise is heard at engine warm-up,
air-bleed the system.
4) How to air-bleed
a) During remaining it for 10 minutes at
3,000 rpm and over 5 minutes at idle, check
that the valve noise is heard.
b) Repeat the above step(a) only once or twice.