ENGINE <4G6> -
On-vehicle Service
11A-12
(3) Carry out lash adjuster simple check. (Refer to
P.11A-13.)
D
If any of the rocker arms can be pushed down
easily during the lash adjuster simple check,
replace the corresponding lash adjusters.
D
If the lash adjuster simple check has been carried
out but all lash adjusters are normal (if none of
the rocker arms could be pushed down easily),
check for some other cause of the problem.
NOTE
You can check whether the lash adjusters are normal
or not by carrying out a leak-down test. (Refer to
the Engine Workshop Manual.)
Caution
Make sure that the air has been fully bled before
installation of a new lash adjuster. (Refer to the
Engine Workshop Manual.)
5. Bleed the air from the lash adjusters. (Refer to P.11A-13.)
6. If the noise does not disappear even after the air has
been bled from the lash adjusters, carry out the following
check.
Carry out lash adjuster simple check. (Refer to P.11A-13.)
D
If one of the rocker arms can be pushed down easily
during the lash adjuster simple check, replace the
corresponding lash adjuster.
D
If two or more of the rocker arms can be pushed
down easily during the lash adjuster simple check,
the cause may be that the oil passage to the cylinder
head is blocked.
Check for blockages in the oil passage, and clear
the blockages if any are found. If there are no
blockages, replace the lash adjusters.
D
If the lash adjuster simple check has been carried
out but all lash adjusters are normal (if none of the
rocker arms could be pushed down easily), check
for some other cause of the problem.
NOTE
You can check whether the lash adjusters are normal
or not by carrying out a leak-down test. (Refer to the
Engine Workshop Manual.)
Caution
Make sure that the air has been fully bled before
installation of a new lash adjuster. (Refer to the Engine
Workshop Manual.)
7. Start the engine and check that the abnormal noise has
disappeared. If necessary, bleed the air from the lash
adjusters. (Refer to P.11A-13.)
