Heat Exchanger / Manifold / Coolant Tank, Replacement (20A-10) - Volvo Penta MD22 Workshop Manual

Heat exchanger / manifold /
coolant tank, replacement
(20A-10)
Applies to MD22A, MD22L-A, TMD22A
1
Drain the coolant circuit, operation 20A-01 and the
sea water circuit, operation 20A-03.
2
Detach the support clamp which holds the output
pipe from the heat exchanger to the bottom of the
intake manifold.
3
Disconnect the sea water intake and outlet pipes on
the heat exchanger.
4
Disconnect the flange screws from the coolant
pipes at the bottom of the heat exchanger / manifold
unit.
5
Remove the support bracket which is installed be-
tween the rear end of the bracket and the adapter
housing for the reverse gear.
6
Unscrew the screws which secure the unit to the
cylinder head evenly in stages in reverse order to
the order shown in the illustration (B). Remove the
unit (A).
7
Remove the gaskets and clean the mating surfaces
on the unit, the cylinder head and the coolant pipes.
Check the components for signs of damage and re-
place if necessary. If the heat exchanger insert
needs replacing, see operation 20A-11.
8
Place a new manifold gasket in position over the
guide pins in the cylinder head (A1). You do not
need to use any sealing compound. Check that the
gasket is correctly installed.
9
Place the unit in position on the cylinder head and
install the mounting screws. Tighten the screws
evenly in stages to 22 Nm in the order illustrated
(B).
10
Install the support bracket between the rear end of
the unit and the flywheel cover.
11
Install the coolant pipes in the bottom of the unit
with new gaskets.
Cooling system
107