MITSUBISHI TRITON 1997 Workshop Manual

ENGINE COOLING ±
General Information/
Service Specifications/Lubricant/Sealants14-2
GENERAL INFORMATION14100010125
The cooling system is designed to keep every part
of the engine at appropriate temperature in
whatever condition the engine may be operated.
The cooling method is of the water-cooled, pressure
forced circulation type in which the water pump
pressurizes coolant and circulates it throughout the
engine. If the coolant temperature exceeds the
prescribed temperature, the thermostat opens to
circulate the coolant through the radiator as well
so that the heat absorbed by the coolant may be
radiated into the air.The water pump is of the centrifugal type and is
driven by the drive belt from the crankshaft.
The radiator is the corrugated fin, down flow type.
ItemsSpecifications
RadiatorPerformance kJ/h4G63 <M/T>114,700
4G63 <A/T>126,800
4G64, 4D56 <2WD>170,000
4D56 <4WD>227,300
Automatic transmission oil coolerPerformance kJ/h4G63 <A/T>6,400
4D56 <A/T>6,300
SERVICE SPECIFICATIONS14100030121
ItemsStandard valueLimit
High pressure valve opening pressure of radiator cap kPa75 ± 10565
Range of coolant antifreeze concentration of radiator %30 ± 60±
ThermostatValve opening temperature of thermostat
C82 + 1.5±
Full-opening temperature of thermostat
C95±
Valve lift (at 95
C) mm4G6, 4D56 <4WD>8.5 or more±
4D56 <2WD>8 or more±
LUBRICANT14100040100
ItemsQuantity

HIGH QUALITY ETHYLENE GLYCOL ANTIFREEZE COOLANT4G637.4
4G64, 4D56 <2WD>7.7
4D56 <4WD>7.8
SEALANTS14100050110
ItemsSpecified sealantRemarks
Cylinder block drain plug3M Nut Locking Part No. 4171 or equivalentDrying sealant
Water by-pass fitting <4G6>Mitsubishi Genuine Parts No. MD970389 or
equivalentSemi-drying sealant

O
N-V EH IC LE S ER VIC E 14100100082
E N G IN E C O OLA NT L E A K C HEC KIN G
1 . Confir m th at th e c o ola nt le ve l is u p to th e fille r n eck.
I n sta ll a r a dia to r c a p te ste r a nd a pply 1 60 k P a p re ssu re ,
a nd th en c h eck fo r le aka ge fr o m th e r a dia to r h ose o r
c o nnectio ns.
C au tio n
1 . Be s u re t o c o m ple te ly c le an a w ay a n y m ois tu re
f r o m t h e p la ces c h ecked .
2 . When t h e t e ste r is t a ken o ut, b e c are fu l n ot t o
s p ill a n y c o ola n t f r o m it .
3 . Be c are fu l, w hen in sta llin g a n d r e m ovin g t h e t e ste r
a n d w hen t e stin g, n ot t o d efo rm t h e f ille r n eck
o f t h e r a d ia to r.
2 . If th ere is le aka ge, r e pair o r r e pla ce th e a ppro pria te p art.
R ADIA TO R C AP V A LV E O PEN IN G P R ESSU RE
C HEC K
1410013011 1
1 . Use a c a p a dapte r to a tta ch th e c a p to th e te ste r.
2 . In cre ase th e p re ssu re u ntil th e in dic a to r o f th e g auge
s to ps m ovin g.
L im it : 6 5 k P a
S ta n dard v alu e: 7 5 ± 1 05 k P a
3 . Repla ce th e r a dia to r c a p if th e r e adin g d oes n ot r e m ain
a t o r a bove th e lim it .
N O TE
B e s u re th at th e c a p is c le an b efo re te stin g, s in ce r u st
o r o th er fo re ig n m ate ria l o n th e c a p s e al w ill c a use a n
i m pro per in dic a tio n.
E N G IN E C O OLA NT R EPLA CEM EN T 14100120156
1 . Dra in th e e ngin e c o ola nt b y r e m ovin g th e d ra in p lu g a nd
t h en th e r a dia to r c a p.
2 . Rem ove th e c ylin der b lo ck d ra in p lu g fr o m th e c ylin der
b lo ck to d ra in th e e ngin e c o ola nt.
3 . Rem ove th e r e se rv e ta nk to d ra in th e e ngin e c o ola nt.
4 . When th e e ngin e c o ola nt h as d ra in ed, p our in w ate r fr o m
t h e r a dia to r c a p to c le an th e e ngin e c o ola nt lin e. C
ap a dapte r

A
llo w able c o nce ntr a tio n H
IG H Q UALIT Y E TH YLE N E
G LY C O L A N TIF R EEZE C O OLA N T 3
0 ± 6 0 % <
4D 56> 4
4 N m 1
9 N m 3
9 N m

C
O OLIN G F A N 14100210020
R EM OVA L A ND IN STA LLA TIO N 4
.9 N m 1
2 N m 4
.9 N m 1
2 N m 1
2 N m
24
3
5
6 <
4G 6> <
4D 56>
1
R em oval s te p s
1 . R adia to r u pper s h ro ud
2 . D riv e b elt s
3 . C oolin g fa n a nd fa n c lu tc h 4
. P ulle y
5 . Fan C lu tc h
6 . C oolin g fa n

ENGINE COOLING ± Cooling Fan14-6
INSPECTION14100220023
COOLING FAN CHECK

Check blades for damage and cracks.

Check for cracks and damage around bolt holes in fan
hub.

If any portion of fan is damaged or cracked, replace cooling
fan.
FAN CLUTCH CHECK

Check to ensure that fluid in fan clutch is not leaking
at case joint and seals. If fluid quantity decreases due
to leakage, fan speed will decrease and engine
overheating might result.

When a fan attached to an engine is turned by hand,
it should give a sense of some resistance. If fan turns
lightly, it is faulty.

Check bimetal strip for damage.

T
H ER M OSTA T 14100240166
R EM OVA L A ND IN STA LLA TIO N <
4D 56> 1
2
3
4
5
6 1
3 N m 6 4
R em oval s te p s
1 . R adia to r lo w er p ip e a sse m bly
< 4G 6>
2 . R adia to r lo w er h ose c o nnectio n
< 4D 56>

B 3. O -rin g < 4G 6>
4 . W ate r in le t fit tin g
5 . W ate r in le t fit tin g g aske t < 4D 56>

A 6. Therm osta t
I N STA LLA TIO N S ER VIC E P O IN TS

A TH ER M OSTA T IN STA LLA TIO N
< 4G 6>
I n sta ll th e th erm osta t s o th at th e jig gle v a lv e is fa cin g s tr a ig ht
u p, w hile b ein g c a re fu l n ot to fo ld o ve r o r s cra tc h th e r u bber
r in g.
C au tio n
M ake a b so lu te ly s u re t h at n o o il is a d herin g t o t h e r u bber
r in g o f t h e t h erm osta t. In a d dit io n, b e c are fu l n ot t o f o ld
o ver o r s cra tc h t h e r u bber r in g w hen in sertin g.
< 4D 56-2 W D>
I n sta ll th e th erm osta t s o th at th e m ark is fa cin g s tr a ig ht u p. J
ig gle v a lv e R
ubber r in g M
ark T
herm osta t

4
G 6 a nd
4 D 56-4 W D 4
D 56-2 W D F
ull- o penin g
t e m pera tu re  C 9
5 9
5 A
m ount o f v a lv e
l if t m m 8
.5 o r m ore 8
o r m ore 9
0 R
ubber
r in g T
herm osta t W
ate r in le t fit tin g R
adia to r lo w er p ip e
a sse m bly O
-rin g V
alv e lif t

W
ATE R P U M P 14100270271
R EM OVA L A ND IN STA LLA TIO N <
4D 56> 1
2 3
4
561
2 ± 1 5 N m
7(
4 W D) (
2 W D) 1
2 ± 1 5 N m 2
4 N m 1
2 ± 1 5 N m 1
2 ± 1 5 N m 1
2 ± 1 5 N m 1
2 ± 1 5 N m 4
1
2
5

H
ard ness c a te gory
( H ead m ark ) B
olt d ia m ete r x le ngth m m 1 4
T 8
x 1 4 2 8
x 2 2 3 8
x 2 8 4 8
x 4 0 5 8
x 2 5 6 7
T 8
x 6 5 7 8
x 7 0 W
ate r p ip e O
-rin g <
4D 56> 1
2
3
45
6
7 d


4 2

W
ATE R H O SE A ND W ATE R P IP E 14100330221
R EM OVA L A ND IN STA LLA TIO N
< 4G 6> 4
8 N m 2
4 N m 6 6
2
1 Rem oval s te p s
1 . W ate r b yp ass fit tin g
2 . W ate r h ose
3 . W ate r p ip e a sse m bly
4 . Therm osta t h ousin g a sse m bly
5 . W ate r in le t p ip e

A 6. O -rin g