im facing the exact same problem with my kancil....the solution is...i'll bypass the termostat..and the fan will turn when we start the engine....ill go to workshop and ask the mechanic to"boss kasi direct ini kipas boss"hehe

the cost last time i did the bypass is rm5 only...only need one wire..un plug the wire to the termostat then ground it..very easy...as fas as im concern it solve my kancil temperature problem....stucked in jammed for 3 hours also the temperature never reach half....been by pass the termostat for almost 6 years without any problem with the fan motor..still running strong...
i think there is no effect when u bypass the thermostat..not effect the engine power...
this temperature problem only happen to several kancil only..others kancil like my fren no need to bypass the thermostat also ok....just luck la..hehe

By passed the thermostat is the easiest way and the cheapest way to overcome the temperature problem...but surely u can try what alternation suggest...like change the thermostat etc...
last time my kancil...change the termostat also not helping,clean all the hoses,radiator and bla2..also not helping..that y my last resort is by pass the thermostat...hehe......but from my experience check here n check there gonna take some time and money also...the choices is in ur hand...
i think u better do full check up on ur kancil cooling system..before do bypassing...allrite bro...

so garry its ur decision la...hehe....
usually theory is helpless unless u experience it urself....bypassing the thermostat may be looks so SCARY to sum people...motor easily broke la...fuel consumption high la(in my own understanding fan doesnt need fuel to run..need electric power..but im not automotive student, what do i know)....but in my experience in myown kancil...i've been bypassing the thermostat for almost 6 years witout any problem at all..like i said before la..its my last resort....

yup ceo684...u rite about those plastic joint...im forgot to mention it....my car already change the plastic joint to some sort of steel look alike joint(dunno what material is that but confirm not plastic)..hehe

i think what u mentioning is jerking when air cond compressor is on...the lessser power is because of the compressor not the fan...

garry...u might also wanna check ur battery grounding.....sumtime the grounding intend to loose..

i sounds not connected rite??sound funny rite??hehe...lazy to explain la..heehe

ok la...im the one who stupid....im the one who doesnt know anything...ok lor.....other wise im not automotive student rite????
my advise to u....dun easily called people stupid la...not nice....looks so rude that way....

im suggesting that way...because im already experiencing it...seriously...
actuallly it kinda hard to explain...why dun u come n c me...then we discuss more about it???im keen to learn from pro like u SleeplessEyes...