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The~mostat ;'9--'
Thermostat. housing,;
10-,.-Cylind~r heactJ.r~~l.cP~fM~;li/~;rf~liw~r
block; 12--Cylinder liner; 13--Cylinder head; 14-Water temperature
g~:P~7~=
.
-
.,!.~.
'1_:"'.
1). Construction and Features
The close type (or open type)
£orc~edcircuJatiQn.w~t(·j: ~ COQli~g
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,,~
l
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!,,;:-
ivi
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["!1t,
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system is adopted in the engine.
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The cooling water is sucked in through .Jp~·:!~~~111?~,~J?f jn~~~t
hose of the radiator and forced by
the
waterplJmpintot~l
Ol&in
,
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water passage located at the upper side"
()fth~pTJiflft~rl:~h)<f~,~,,,f\
portion of the
wate~entersi?to
.the
.~ylinderblpc~\t,h.t0M.i,f
four
small holes to cool the cylinder
liners.l·h~ remain~:pa~~h~jlh.JH\l~?
four holes of different diameter and enters into the cylinder head.
The guide plates provided within the cylinder head make the water
coolant flow concentrately through the triangula.r z9nes·among the
.
"
f:
f
swirl chan1ber, the air intake port and the exha.ust port.' The heate-d
,
-
water flows through the upper portion of the cylinder head and the
engine water outlet hose back to the' upperta,r)K
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the-:'radiator.
Then the water passing through
the,thin:~iwal1~
. .
p~ling
tubes of the
.
"
-
~
..
radiator element is cooled by
thec=()oli~fa.q.'Jl'nd~finally
returns to
the lower tank of the radiator
tocomplete(;lH~i~;g;circulation'"
...
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In order to control the water temperab.1re
;,~;thermostat
is pro-
vided on the cylinder head front cover. When cylinder head outlet
water temperature reaches 70+ 2°e, the thermostat, starts to open,
and when the temperature reaches 85°C, the th~rlnostat opens ful-
ly.
When the water temperature is below the lower limit, the
thermostat remains closed and the cooling water can't flq;W to the
upper tan.k of the radiator, but flows back to the
w~~e,r
pump
through the small bypass pipe beneath the thermostat.-·Thu,g, the
cooling water directly pumped back to the cylinder 'block"ifni! head
69
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