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Cooling system
Circulation pump, replacement
(20A-05)
1
Disconnect the battery.
2
Drain the coolant circuit, operation 20A-01.
3
Disconnect the suction pipe at the circulation pump
and, if necessary, the by-pass connection.
4
Position the piston in cylinder 1 at TDC in the com-
pression stroke, operation 17A-01 and install the
adjustment drifts.
5
Remove the cap of the timing cover, operation 15A-
01 and the timing belt, operation 15A-4.
6
Remove the timing cover, operation 15A-08. Re-
move the pump mounting screws and remove the
pump (A).
7
Check the pump for wear and damage. If there is
any fault, the pump must be replaced as one unit.
8
Check that the mating surfaces of the circulation
pump and cylinder block are clean.
9
Apply a 1.0-1.5 mm continuous line of sealant on
the pump mating surfaces, on the impeller side of
the mounting holes (B1). If the old mounting screws
are to be used, clean the threads of the screw
which is to be installed at the “10 o’clock” position
(A1) and apply sealant to the thread. Place the
pump in position and tighten the mounting screws
immediately after applying the sealant. Tighten the
screws evenly in stages using the correct torque,
see section 11B.
10
Install the timing belt, operation 15A-04 and adjust
the belt tension, operation 15A-03. Check the set-
ting of the injection pump, operation 17A-03.
11
Check that the adjustment drifts have been re-
moved and install the screw in the adjustment hole
on the top of the camshaft cover.
12
Connect the hose to the intake side of the pump
and, if necessary, connect the by-pass connection.
Fill the cooling system with the correct coolant, see
the relevant manual.
Fill the coolant circuit, operation 20A-02.
13
Connect the battery. Run the engine and check for
leakage.
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