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236
F1C ENGINE
Figure 132
Take out the screws (4) and replace the phonic wheel (3).
Screws (4) shall be tightened to 10 + 1 Nm.
Replacing timing control gear
On finding the timing control gear teeth (1) damaged or
worn, remove them from the crankshaft (2) using a suitable
extractor.
The new gear is fitted onto the crankshaft by heating it to a
temperature of 180°C for no longer than 15 minutes.
On completing assembly and after the gear has cooled, it
must withstand a torque of 150 Nm without slipping.
ENGINE ASSEMBLY
The following parts must be replaced with new ones at the
time of assembly: retaining rings, seals and gaskets, screws
whose thread is coated with sealant.
Figure 133
Fit on the oil spray nozzles (2) and tighten the couplings (1)
to the prescribed torque.
Base - March 2006
Assembling main bearings
Figure 134
87792
NOTE
Not having found it necessary to replace the main
bearings, they need to be fitted back on in the same
sequence and position found upon disassembly.
The main bearings (1) are supplied as spare parts undersized
on the inside diameter by 0.254 ÷ 0.508 mm.
NOTE
Do not do any accommodating on the bearings.
Thoroughly clean the top main bearing shells (1) and position
them in the crankcase.
NOTE
The middle half ring (2) is fitted with thrust washers.
540811
Measuring main journal assembly
clearance
Figure 135
Mount the crankshaft (1).
Check the clearance between the crankshaft main journals
75306
and their respective bearings by proceeding as follows:
- Thoroughly clean the pins.
- Apply a calibrated wire onto the main journals.
D
E
4
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