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A
DE(;~~,IZING
(1) Remove the cylindefli~ad aIld gasket (Soction A.6)
and the valves (Section
A.8),c;;~1:#~
(2) Scrape the carbon
from~the
piston
crow~~ ~ylirider
head,valves, and cylinder block, leaving a ring of
carbon around the periphery of ~<lwach pistoJ\,and
the top of each bore. Blow all deposits of carbon
from the head and block.
r
(3) Refit the cylinder head (Section A.6).
Section A.7
(5) Remove the rocker cover, rocker shaft, push-rods,
sparking plugs, and the three screws securing the
radiator tie-plate to the thermostat housing.
(6) Disconnect the radiator to cylinder head hose,
the suction advance pipe from the clip on the water
inlet pipe and the heater hose from the water
valve at the rear of the cylinder head.
(7) Slacken the water by-pass hose.
(8) Remove the remaining cylinder head nuts.
NOTE.-The Cooper '8' has an additional bolt
at the front of the cylinder head.
(9) Lift the head squarely. If the joint sticks, tap each
side of the head with a wooden or hide mallet.
Lift the gasket from the studs.
Refitting
Reverse the removing procedure" noting the following
points.
"'.
(10) Tforoughly clean the faces of the cylinder, head
•
and the top of the block, and
,):1t
a new
g~sket
without jointing compound or,
grease,~~e g~!et
is marked 'TOP' and 'FRONT .
cje,;,;/7:,
(11) Tighten the cylinder head and rocker
sh~
nuts
to the correct torque and in the order shown in
Fig. AA. The additional bolt on the Cooper'S'
must be tightened last. Do not overtighten.
(12) Adjust the valve rocker clearances, start the engine
and when warm re-check.
.
"
THE ENGINE
"
"
19)
~~ove
the sparking plugs, engage top gear and
push the car forward to rotate the crankshaft.
Tili,s operation can be also effected by jacking up
one side of the front suspension until the road
wheel can be rotated, and thus turn the crankshaft
to the required position.
(20) Rotate the
cr~nk_shaft
until the valve being checked
has its tappJt resting. opposite the peak on the
camshaft, i.e, valve completely closed. This cannot
be observed accurately, therefore if checking is
carried out according to the adjustment chart, this
will avot<1.: turning the crankshaft more than is
necessary. The valve rocker clearance ,is given in
'GENERAL DATA'•
.c)
Hold the adjusting screw against rotation while
c
I slackening the locknut, insert .the feeler gauge and
,turn the adjustment. screw until the gauge is a
sliding fit, tighten the locknut and recheck the
.c!ealfl
nce .
)
i~~t
the rocker cover with a new joint washer if
n~cessary, and lower the car (if jacked up).
\, Adjust No. I rocker with No. 8 valve fully open
~
"
,,3
" "
6 " "
"
-:'H"
5
" "
4 " "
"
,
"
,,2
" " " 7 , ,
"
"
"
,,8
" " " 1
c' c ' "
i
'?
"
"
,,6,
,;.1"""
3
" i "
"
5
;";:l
"
" "
2
"
,.
•
•
Section A.6
~
. . .
~
- f
CYLINDER HEAD
Remo~g
.
' .
(0 Remove the bony.p:.
...
(2) "rlrain the coolin"tem (Section C.l).
(3)
Disco~nect
the battery.
(4) Remova;the air cleaner (Section A.I), carburetter
(S((CtioniA.2), and exhaust manifold (Section AA).
'.",
' f :;:
. . .
\
'f""!,
I: ...
!i~
Fig. AA
The order of s!qpkening and tightening the cylinder head retaining nuts
1,."
~.:i.~
-
A.5
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