F70_F75_F77-CO-Cooling_System-Part1
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O
DAIHATSU
~ Service
manual
'COOLING SYSTEM
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DAIHATS
CUOLING SYSTEM
TROUBLE SHOOTING ..............,......_. PRECAUTIONS
COOLING SYSTEM OUTUNE
CHECK & CHANGE
OF ENGINE COOLANT WATER PUMP
THERMOSTA I' RADIATOR TIGHTENING TOROUE SERVICE SPECIFICATION
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COOLING SYSTEM
TROUBLE SHOOTING
I Problem Possible cause
Engine avefneais Pom clualiny coolant
Water pump drive melt Loose or lmssmg
Dm. leaves or insects on radlaidr
Laaky- hams. wal:-ar pump. zlaarrreeslal-110USing; radiator, heater cure plugs or head gasket
Remedies
Repleniain coolant.
Ad|ust nr replace bran
Clear: radlatnr.
Repair as rlacessary.
Check thermosiai.
Set
Replace hnse.
Hepiace pump.
Cha-ck_ radiaior
Repair as necessary.
PRECAUTIONS
As regards water to be used as coming waxer. use soft' water -.wich does not contain salts 'oi minerals.
calcium. magnasiurn and so forth.
i' the coolani gets tc: the vehicle body, immediately flush away the coolam- uslng water'
Never open the radiator cap when the cooling ware: is not.
WARNING:
= The inside oi the radiator is under a pressurized condition when the cooling water is hot. Therefore,
ii' the radiator cap should be removed. the cooling water will blew off. possibly causing injuries such' as scald. ___ _.1
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COOLING SYSTEM
COOLING SYSTEM OUTLINE
type- m whmh 'the therrnoslal is aquippeu with a by-pass vaive The total czapaciiy of the 'cooling water is approximataiy 109,
l_J Turbo changer
TURBO CHARGER COOLING WATER ROUTE
The turbo charger is cooled by the cooiing water which flows in the foilowing route: cylinder block - turbo charger - turbo charger water by-pass - water pump.
an
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COOLING SYSTEM
RADIATOR
Radiator speciiicaiion
Hacliaior water capacity dm' 2.6
Coolant Capacity (exciuding reserve 10.50 (Vehicle with heater)
9.89 (Vehicle withoui heater)
RADIATOR CAP
.#1 pressure Iype radrator cap is instalied at the Upper part of the radiaior. Yhe radiator map has two vaives: a pressure regulating valve and :a negative prerssure valve when the pressure of the cooling system exceeds a specified umm, the rising. prassuue opens the paressme regulaling waive of H'1eradia:o_r cap. As' a result. the coolanz inthe rachator Hows To lhe rc-:serve tank.
OH me other hand. 'he negative pressure valve opens the inner pressure drops' bf-Huw the atmospheric pressure I0 E1 dropped water Iemperature afler the engine has siopped Thus. me coolant returns from me reserve tank 'Io the radiator.
Radiator cap specifications
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COOLING SYSTEM
COOLING I-Ah
lhe fan comes ln two specifrcations- One ns a type where wh-sf Ian is directly ocannactc-d m me water pump pulley, *Fine other is a where the fan is connecwcl tu the putley through .a Hund-couphng.
The 'fan-equipped fluid .coupling wrth a temperature control device is employed in order that the noise level may be |'e-fjucecj.
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Fnlrxhcerfnnre. the :Imp in engine output clue to the inslellaliufw el the cooling fan has been kept 10 a mi ~-.mer-1 ievei.
410 mm dia. direct cnnnecuon
Q
1110 mm dia. Iluid coupling
FLUID COUPLING WITH FAN
The rimfj coupling empioys a three-stage temperature contrél INDE
Specifications
W
ham
gpggiiicatluns
3200 an 55°C w
3500 at 50°C
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COOLING SYSTEM
THERMOSTAT
The thezrrnostat is a wax type with +1 bypass valve; The thermostat helps the engme to warm up quickly hy aliowing the cooimg water :ca be recirculated Ihrough the cyiincier block and cylinder hc-:ad withc=utpasstr1g through the radiator. Fur1hermone. the rherrnosta: is equipped with a jiggie pin which performs me air bleeding whale the engine is stopped. Also. the jiggle pin allows the temperature Of the cooling water to rise quickly ciunng the _warrrnrsg-up period.
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Thermostat specifications
Rem _Siandarn speciflcaliaris I area specific.a;ions k Type
Y
_ Wax type Value opening temperature- | 'B2 1 2 | B5 1 2
value opening temperature- 'B2 1 2 B5 1 2 Valva lull openmg temperature 7
“E 7
95 100 f
f
xmsmcouizz
P
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COOLING SYSTEM
Check of coofam lever Check 10.392 lf the coolant level is between the LOW and FULL lines of the reserve iank. If tha coolant Ievel is near the low levee! or beiow the low ievel, add the coolant up to the level.
Check ol coohant quality There shouid not be any excessive deposits of rust or water scales around the 'radiator cap dr the radiator filler hola. Also, lhe coolant shoufcd be free of 011. Change the cooiant if it is excessively duty or me time due to change the-Gnolant has already arrived.
WARNING: - Never open the radiator cap when the engine is hot.
Change of engine coolant (1) Fiemove the radiator cap.
`wAnN|NG;
- Never open 1he radiator cap andlor me drain plug when the engine is still hm. Care must be exercised _ to avoid getting scalded,
(2) Place an adequate container beiow the radiator drain plug. Draimha coolant by ramovxng the drain ptug (3) Close the dram plug. Fili the syfslern rh water. (5) S1-an the engine. and stop II. (G) Repeat the steps (1) through (5) tum I0 three times. NOTE: » Replace the drain plug gasket wish a new one.
I7) the radiator and reserve tank wiih antifraaze soiution in accordance wrrh the of the manufacturer of the antifreeze solutican CAUTION: -- Use -fi Good brand of ethylene-glycol base antifreeze
soiution. Coolant Capacity (excluding resewe tank);
10.50 [Vehicle with heater) 9.81? [Vehicle without heater)
nwsuimla
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the coolant level in fne radiator. Replensh- the radualor f' '
Wm. wa1er, as required. Repler-:ish 'ha reserve zank umm wfwwawvf
coolant up tn the full Ievat NOTE. - Hera, the coolant refers to the mixture oi water and antifreeze that has been mixed in accordance with the instructions of the antifreeze manufacturer.
CO-B
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WATER PUMP
im
Q) Flwd auuphng 410 mm dia. Iluid coupling type
Fl
COOLING SYSTEM
1* ; Non-reusabla paris
REMOVAL OF WATER PUMP
1. Discnnnact. the battery ground cable from the negative - -) terminal of :he battery. 2. Drain the coolant. [See page CO-F)
Open the radbatcar cap and drain plug, and allow the coolant to dram ifite a ciean container.
WARNING:
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Q Never open the radiator cap andfor drain plug while the engine is hot.
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