CYLINDER HEAD & CAMSHAFT 3
NOTE:
•
The camshaft caps are unique to each cylinder
head and are, therefore, not available
individually. If a camshaft cap is worn or
damaged, the complete cylinder head must be
replaced.
Measuring The Compressed Plastigauge.
5.
Calculate the journal clearance using the
Plastigauge chart supplied with the Plastigauge kit.
6.
If the clearance measured is within the specified
tolerance, remove the cap and clean off all traces of
Plastigauge. Assemble the camshafts as described
in this section.
NOTE:
•
If
the measured clearance is outside the
tolerance, and the camshaft journals are within
tolerance, the cylinder head must be replaced.
A
CAUTION: Although Plastigauge is oil
soluble, all traces of the material must be
removed to prevent blockage of the oil drillings
and resultant engine damage.
Installation
1.
Thoroughly clean the camshafts and journals.
Inspect the ends of the camshafts for correct fitment
of the sealing plugs. Lubricate the camshafts with
clean engine oil before fitting to the head.
2.
Locate each camshaft to the head ensuring the
camshafts are correctly identified (inlet and
exhaust) and also correctly located over their
respective valve banks.
3.
Working on one camshaft at a time, locate the cam
chain over the cam sprocket. Position the camshaft
in the same position as for removal
before
attempting to fit the caps
(that is, with the timing
marks on the camshaft sprockets level and pointing
inwards, and with the crankshaft position sensor in
li
ne with the 'Ti' mark on the crank rotor.
4.
Repeat the procedure for the other camshaft.
A
CAUTION: If the camshafts and caps are
fitted without first aligning the timing
marks on both the crankshaft and camshaft
sprockets, or if both camshafts are fitted at the
same time, the inlet and exhaust valves will
contact each other causing damage to both the
head and the valves.
5.
Lubricate the threads of the camshaft cap screws
with engine oil and evenly and progressively tighten
to
10 Nm.
6.
Before fitting the cam chain tensioner, ensure that
each camshaft rotates freely.
Do not rotate either
camshaft by more than 5
°.
CAUTION: If any components have been
•
renewed, the valve clearances must be
checked and adjusted. Running with incorrectly
adjusted valve clearances may cause excess
engine noise, rough running and engine damage.
7.
Refit the top pad and tighten the fixings to
10 Nm.
8.
Assemble the cam chain tensioner using the
instructions given earlier in this section.
9.
Check the valve clearances. Adjust as necessary.
10.
Refit the engine covers, coils, airbox, fuel tank and
bodywork as described earlier in this section.
3.11
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