•
Remove the intake and exhaust cam-
shafts.
If the two camshafts are timed correctly, the ex-
haust camshaft gear tooth (indicated with a dot) is
meshed with the trough of the intake camshaft
gear (indicated with two dots).
Inspecting camshafts
CAMSHAFT TOOTHED WHEEL CHECK
•
Check that the camshaft gear works properly: if it is damaged or does not move smoothly,
replace the timing chain and the camshaft gear.
CAMSHAFT LOBES
•
Check that they do not show blue colouring, cracks or scratches; otherwise, replace the
camshaft, gear and chain.
•
Fasten the camshaft in horizontal po-
sition, as shown in the figure, and make
it spin to check the eccentricity with a
dial gauge; if necessary, replace the
part.
Characteristic
Maximum camshaft axial clearance (intake/ex-
haust)
0.4 mm (0.0016 in)
WARNING
THE EXHAUST CAMSHAFTS OF THE FRONT AND REAR CYLINDER BANKS MUST BOTH BE OF
THE SAME TYPE - EITHER WITH A CONVENTIONAL GEAR OR WITH A SELF-ADJUSTING CAM-
SHAFT GEAR. THE TWO TYPES OF CAMSHAFT ARE INTERCHANGEABLE ON ALL ENGINES
IRRESPECTIVE OF THE CAMSHAFT TYPE ORIGINALLY INSTALLED.
RSV4 Factory a-PRC Engine
ENG - 311
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