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6
2. Use a micrometer to measure the maximum dimensions
of the involutes of the intake, exhaust and injection
cams (see "Table of cam dimensions").
Table of cam dimensions
Dimensions (mm)
Réf.
H
29,598÷29,650
H 1
28,948÷29,000
If the dimensions of cam involutes are lower than the
values shown by 0.1mm (maximum dimension), replace
the camshaft with an original spare.
Important
• Protect the contact surfaces with lubricant oil, to
prevent them from rusting.
3. Replace the camshaft (see "Assembling tha
camshaft").
6.3.4 Checking and replacing the fuel pump drive rod
To check the drive rod it is necessary to disassemble
the fuel pump.
See "Disassembling the fuel pump" for the correct
procedure.
1. Rotate the camshaft until the drive rod is at the most
indented point.
2. Check that the distance between the drive rod (A) and
the cylinder head is between 1.66 and 2.18mm. If
the distance does not correspond to this value,
replace the drive rod with an original spare.
3. Assemble the fuel pump (see "Assembling the fuel
pump").
52
OVERHAULS AND TUNING
Service Manual LDW FOCS 502 automotive _ cod. ED0053027270 - 3° ed_rev. 02
67
A
68
Fuel pump
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