Service manual

G420F(FE) Service Manual Chapter 3. Engine Mechanical System 86
5) If the valve noise is still heard after following
the above step 4), replace the hydraulic lash
adjuster(HLA) which makes noise.
6) If the valve noise is heard after replacing parts,
necessarily repeat the above step 4).
7) After air-bleeding the system and replacing
parts to remove noise, if the valve noise is re-
heard 2-3 days after, it might be affected from
defective HLA, so replace the defective HLA.
NOTE: In case of the vehicle with HLA, when initially
starting the engine, it is normal if valve noise is
momentarily heard.
CAUTION
Because HAL is precision parts, take care not to
come foreign materials such as a dust from
outside.
Do not disassemble HLA.
When cleaning HLA, use clean diesel oil.
Take care not to make scratches and sharp
edges to O.D of HLA.
With HLA filled with engine oil, grasp A and
press B by hand as shown in the illustration, if
the HLA is moving, replace the HLA.
Timing Chain
1. Check the timing chain bushing and plate portion
for wear and if those are severely worn, replace
those.
Installation
1. Install HLA
2. After Installing the intake and exhaust camshaft
by aligning it with the timing mark on the timing
chain sprocket, install the camshaft to the cylinder
head.
CAUTION
Apply engine oil to the camshaft journal and
cam.
There a detective pin for TDC sensor in the in-
take camshaft rear end and a dowel pin in the
intake camshaft front end.