Subsection 08 (TOP END)
2. Drain coolant (refer to
PERIODIC MAINTE-
NANCE PROCEDURES
subsection).
3. Disconnect the coolant hose from the thermo-
stat housing.
NOTE:
Before removing cylinder head, blow out
remaining coolant by air pressure. During cylin-
der head removal, the remaining coolant in cylin-
der head could overflow into the engine and a little
quantity of coolant could drop into the engine. In
this case, the engine oil will be contaminated.
4. Refer to
EXHAUST SYSTEM
subsection and
disconnect exhaust system head pipe from
cylinder head.
5. Disconnect spark plug wire.
6. Disconnect temperature sensor connector, lo-
cated at rear cylinder head.
7. Remove the intake manifold. Refer to
INTAKE
MANIFOLD
subsection.
8. Remove the valve cover and its gasket (see
VALVE COVER
in this subsection).
9. Refer to the
TIMING CHAIN
subsection to re-
move the following parts:
– Chain tensioner
– Camshaft timing gear.
10. First remove the M6 cylinder head screws,
then the cylinder head screws M10.
tmr2011-013-011_a
1. Cylinder head screws M10
2. Cylinder head screws M6
11. Pull up cylinder head.
12. Remove timing chain guide (fixed).
13. Remove and discard the cylinder head gasket.
R400m
o
tr72A
3
1
2
4
1. Cylinder head
2. Timing chain
3. Chain guide (fixed)
4. Cylinder head gasket
Inspecting the Cylinder Head
Inspect timing chain guide (fixed) for wear, cracks
or other damages. Replace if necessary.
Check for cracks between valve seats, if so, re-
place cylinder head.
Check mating surface between cylinder and cylin-
der head for contamination. If so, clean both sur-
faces.
Clean oil support through the cylinder head from
contamination.
1
R400m
o
tr73A
2
3
1. Oil port to lubricate camshaft lobes intake/exhaust
2. Oil supply to camshaft bearing journal (timing chain side)
3. Oil supply to camshaft bearing journal (spark plug side)
Inspecting the Cylinder Head Camshaft
Bearing
Measure camshaft bearing in cylinder head.
12
vmr2016-419