Coolant Flow
Illustration 11
g01206083
Coolant flow
(1) Radiator
(2) Water pump
(3) Cylinder block
(4) Engine oil cooler
(5) Cylinder head
(6) Water temperature regulator (thermostat)
and housing
(7) Bypass for the water temperature
regulator (thermostat)
The coolant flows from the bottom of the radiator (1)
to the centrifugal water pump (2). The water pump (2)
is installed on the front of the timing case. The water
pump is driven by a gear. The gear of the fuel
injection pump drives the water pump gear. The water
pump forces the coolant through a passage in the
timing case to the front of the cylinder block (3).
The coolant enters a passage in the left side of the
cylinder block (3). Some coolant enters the cylinder
block. Some coolant passes over the element of the
oil cooler (4). The coolant then enters the block (3).
Coolant flows around the outside of the cylinders then
flows from the cylinder block into the cylinder head
(5).
The coolant flows forward through the cylinder head
(5). The coolant then flows into the housing of the
water temperature regulator (6). If the water
temperature regulator (6) is closed, the coolant goes
directly through a bypass (7) to the inlet side of the
water pump. If the water temperature regulator is
open, and the bypass is closed then the coolant flows
to the top of the radiator (1).
i05779893
Basic
Engine
Introduction
The eight major mechanical components of the basic
engine are the following parts:
• Cylinder block
• Cylinder head
• Pistons
• Connecting rods
• Crankshaft
• Vibration damper
• Timing gear case and gears
• Camshaft
UENR0617
17
This document has been printed from SPI2. NOT FOR RESALE.