Perkins 1300 EDi Series, Workshop Manual, Page: 191 / 264

Workshop Manual, TPD 1353E, Issue 3 179
12
Peregrine EDi and 1300 Series EDi
Cooling system 12
General description
Coolant from the bottom of the radiator passes along a channel in the timing case to the centrifugal coolant
pump, which is fitted on the front of the timing case. The pump is belt driven and assists the flow of the coolant
through the system. The coolant passes along another channel in the timing case to a passage in the cylinder
block. An equal amount of coolant passes to the bottom of each cylinder liner at an angle. This angle causes
the coolant to move around and up the cylinder liners. The movement of the coolant helps to cool the cylinders.
The coolant leaves the cylinder head at the front and passes into the thermostat housing. If the thermostat is
closed, the coolant goes directly through a by-pass to the inlet side of the coolant pump; if the thermostat is
open, the by-pass is closed and the coolant passes to the top of the radiator.
From the cylinder block, coolant also passes through the oil cooler to the inlet side of the coolant pump.
From the cylinder block, coolant also passes through the air compressor, if one is fitted.
A coolant filter is fitted to the rear of the timing case. Ports in the coolant channels in the timing case allow 3%
to 10% of the coolant to pass through the filter. The filter contains a special inhibitor that helps to prevent
corrosion in the cooling system.
A tensioner pulley automatically maintains the correct tension of the drive belt.
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