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Retard
Side Path
Decompress
Retard Side
Path
Close
Open
Vinyl Tape
AVENSIS REPAIR MANUAL (RM1018E)
ENGINE MECHANICAL
Advanced
Side Path
HINT:
When the lock pin is released, the camshaft timing gear re-
volves in the advance direction.
Hold Pressure
A62192
CAUTION:
Camshaft timing assembly gear occasionally shifts to the
retard side abruptly, if the air compression of the advanced
side path is released first. It often causes the breakage of
the lock pin.
(c)
CAUTION:
Be sure to perform this check by hand, instead of air pres-
sure.
(d)
16.
(a)
CAUTION:
Be careful not to damage the camshaft.
Advance
(b)
Side Path
HINT:
The one of the 2 glooves on the cam journal is for retards (up-
per) and the rest is for advances (lower). Each groove has the
2 oil paths. Plug one of the oil paths for each groove with rubber
Open
pieces before wrapping the cam journal with the tape.
Close
Rubber
A62190
http://vnx.su
–
CAMSHAFT (1ZZ–FE/3ZZ–FE)
(4)
Confirm if the camshaft timing gear assembly re-
volves in the timing advance direction when weak-
ening the air pressure of the timing retard path.
(5)
When the camshaft timing gear comes to the most
advanced position, take out the air pressure of the
timing retard side path, and then take out that of tim-
ing advance side path.
Check smooth revolution
(1)
Revolve the camshaft timing gear assembly within
the movable range [20Y (40YCA)] except for the
most retarded position several times, and check the
smooth revolution.
Check the lock in the most retarded position.
(1)
Confirm that the camshaft timing gear assembly is
locked at the most retarded position.
REMOVE CAMSHAFT TIMING GEAR ASSY
Clamp the camshaft in a vice, and confirm that the gear
is locked.
Cover 4 oil paths of cam journal with vinyl tape as shown
in the illustration.
(1)
Punctuate the tape for the advance oil path and for
the retard oil path in the opposite side from the ad-
vance as shown in the illustration.
14–69
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