A07283
O-Ring
A01816
A05280
Align
Intake
A05195
Intake
Main Gear
Sub-Gear
Service Bolt
-
ENGINE MECHANICAL
CYLINDER HEAD
EM-37
980
Author:
Date:
2001 SIENNA (RM787U)
29.
REMOVE OIL DIPSTICK AND GUIDE
(a)
Remove the bolt holding the dipstick guide to the LH cylin-
der head.
(b)
Pull out the dipstick guide together with the dipstick from
the No.1 oil pan.
(c)
Remove the O-ring from the dipstick guide.
30.
REMOVE CYLINDER HEAD COVERS
Remove the 8 bolts, cylinder head cover and gasket. Remove
the 2 cylinder head covers.
31.
REMOVE CAMSHAFTS OF RH CYLINDER HEAD
NOTICE:
Since the thrust clearance of the camshaft is small, the
camshaft must be held level while it is being removed. If the
camshaft is not kept level, the portion of the cylinder head
receiving the shaft thrust may crack or be damaged, caus-
ing the camshaft to seize or break. To avoid this, the follow-
ing steps should be carried out.
(a)
Remove the intake camshaft.
(1)
Align the timing marks (2 dot marks) of the camshaft
drive and driven gears by turning the camshaft with
a wrench.
(2)
Secure the exhaust camshaft sub-gear to the main
gear with a service bolt.
Recommended service bolt:
Thread diameter 6 mm
Thread pitch 1.0 mm
Bolt length 16 - 20 mm
HINT:
When removing the camshaft, mark certain that the torsional
spring force of the sub-gear has been eliminated by the above
operation.
