47
Valve springs
Outer valve spring
Length unloaded ................................. 61 mm
With load of 300–390 N (30–39 kp) .. 49.6 mm
Inner valve spring
Length unloaded ................................. 53 mm
With load of 80–170 N (8–17 kp) ...... 42.6 mm
Checking
Check:
–
rocker arm shaft/bushing wear
–
that the adjusting screws are not deformed or
worn on the surface against the push rods
–
the threads on the adjusting screws and lock
nut
–
that the lock nut is not damaged
–
that the contact face against the valve stems is
not worn or damaged in any way. Minor wear
can be remedied by grinding to a smooth fin-
ish.
Rocker arm mechanism
Special tools:
(999) 2677 Drift
2267 Drift
Replacing bushings
1.
Press out the old bushing with drift 2677 and coun-
terhold 2267.
2.
Oil and press in the new bushing.
Make sure the oil hole coincides with the oil drill-
ing in the rocker arm.
3.
After pressing in, ream to 25.02–25.04 mm.