Technical information

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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 H1 , replace the camshaft.