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Workshop Manual__3 - 4 LD_cod. ED0053025560_
4° ed
_ rev.
03
Disassembly / Reassembly
Camshaft pin and housing dimensions (mm)
A
= 18.000 ÷ 18.018 (housing on the base)
B
= 17.945 ÷ 17.975
C
= 18.000 ÷ 18.018 (housing on the port)
D
= 17.945 ÷ 17.975
A-B
and
C-D
= 0.025 ÷ 0.073 Worn limit = 0.13
Distribution timing without following the references
Place piston
A
at the top dead centre.
Insert the camshaft, thus the intake cam
B
and the exhaust
cam
C
are well balanced (while the intake opens, the exhaust
closes).
Insert the respective tappets
D
and
E
.
Carry out the check: the intake
D
and exhaust
E
tappets laid on
their cams shall be at the same level
F
.
Distribution timing
assemble the camshaft gear by coinciding reference
1
with
reference
2
of the gear (camshaft key).
Camshaft intake and exhaust cam height.
The two cam heights are different.
Dimensions (mm) :
H
= 33.92 ÷ 34.02 (intake cam)
H
1
= 33.42 ÷ 33.52 (exhaust cam)
If the cam wear exceeds the agreed minimum value of 0.1 mm
for
H
and
H
1
, replace the camshaft.
Summary of Contents for 3LD 450
Page 1: ...WORKSHOP MANUAL Engine Series 3 4 LD ...
Page 9: ... 9 Workshop Manual_3 4 LD_cod ED0053025560_4 ed_ rev 03 ...
Page 45: ... 45 Workshop Manual_3 4 LD_cod ED0053025560_4 ed_ rev 03 ...
Page 46: ... 46 Workshop Manual__3 4 LD_cod ED0053025560_4 ed_ rev 03 ...
Page 47: ... 47 Workshop Manual_3 4 LD_cod ED0053025560_4 ed_ rev 03 ...
