Cultus 2003 auto radiator fan in scorching karachi heat?

[Moderator]

installing the thermostat valve is kind of risky though in older cars, especially the ones that have their engine's / gaskets overhauled ..

regretfully it is sad to read such statement from a member who is over the forum since 2009.

in Lahore @Syncview will help you

in KSA where the avg summer temps in open is 42C from April 15 to Sept 15 every year, such practices of removing thermostat valve & making electric fan run directly are forbidden. Even the shady workshops in middle of no where does not do such blunders.

this thread will help for a DIY radiator flush

[saadkhalid6220]

I was born and raised in KSA. Never seen even a single car that has fan direct regardless of car age.
Can you recommend someone in karachi who can get my cooling system in order? After following DYI flush thread that you shared.
Thank you.

[saadkhalid6220]

I would also like to know where you got your cooling system in order. Thanks.

[brownrose78]

@saadkhalid6220
Even your car is not so much old. I have Masha Allah more older cars than yours.
If you are in Karachi, you can visit Mr. Irshad at Jamil Autos near Shahrah-e-Qauideen. Contact number is 0300 223 7538

https://www.google.com/maps/dir/24.8459554,67.0987551/24.8707909,67.0468427/@24.8695713,67.0385977,14z/data=!4m4!4m3!1m1!4e1!1m0?entry=ttu

Give him Pakwheels reference and fix as per your requirement

[Massive_One]

regretfully it is sad to read such statement from a member who is over the forum since 2009.

in Lahore @Syncview will help you

I also wrote that statement regretfully : ), but that's the ground reality .. most of the old cars do heat up in summers due to such issues (either due to negligence of mechanics in repairing the cars or car owners maintainign the car), but removing thermostat in summer (for old engine) is just a risk mitigation tactic.

I showed my car to 2 different "experts" in Lahore , one in Johar Town and one in Iqbal Town for A/C gas leakage issue.. both "changed" the concerning parts, and gas leaked during the end of summer season again and again... so .. yeah .. it is what it is .. that's how our mechanics work there sadly : /

will definitely visit Syncview this time when i visit Lahore .. let's see if he's able to fix the issue or not

[Massive_One]

gasket ki kya position ha? kbhi change krwani pari hai jab se car li hai?

car does not reduce oil, no smoke, no power loss felt, etc... gasket change nahi karwayi kabhi jab se car li hai

[Xulfiqar]

I showed my car to 2 different "experts" in Lahore , one in Johar Town and one in Iqbal Town for A/C gas leakage issue.. both "changed" the concerning parts, and gas leaked during the end of summer season again and again... so .. yeah .. it is what it is .. that's how our mechanics work there sadly : /

This is a twofold issues,
car owners in Pakistan want the absolute best genuine quality repair for no money spent, When such customers flood the market it creates a very nice market for crooks to thrive.

And furthermore as there are no checks and balances or accountability on anything or any service provision, the crooks become complacent (deadly for end user)

The other major issue is that people ask for car repair as:

I live in (insert area) - I want the mechanic right outside my doorstep, have all extensive tooling and should accept payment in thankyous and barter.

[pwuser150520264261]

I could be wrong but agr gasket 100% ok na ho to shyd water level reduce hota hai mere paas baleno hai 2 saal chalayi pani Kam krti thi reservoir bottle se radiator se nhe aik din achanak block me Pani Chala gya and engine refused to turn and as a result gasket replace krni pari Pani to ab bhi Kam hojata hai bottle me se lekin pehle jitna 100km pe hota tha ab utna he 3 to 400km drive k baad hota hai and yes my car was giving white smoke on cold start even in summer before this gasket thing happened

[Massive_One]

I could be wrong but agr gasket 100% ok na ho to shyd water level reduce hota hai mere paas baleno hai 2 saal chalayi pani Kam krti thi reservoir bottle se radiator se nhe aik din achanak block me Pani Chala gya and engine refused to turn and as a result gasket replace krni pari Pani to ab bhi Kam hojata hai bottle me se lekin pehle jitna 100km pe hota tha ab utna he 3 to 400km drive k baad hota hai and yes my car was giving white smoke on cold start even in summer before this gasket thing happened

hmm, i think gasket check karwa leni chahiye mujhy bhi.. asal main koi smoke nahi tha aor na hi oil reduce ho raha tha to engine khulwanay ka dil nahi kiya : ) engine khola to phir mechanic ne kuchh na kuchh kam to nikalna hi hai kharabi ka : )

[pwuser150520264261]

that's true engine khuly to kuch na kuch kharcha to phir hona he hai....u running your car with tstat or without it? and fan is auto or direct

[Massive_One]

u running your car with tstat or without it? and fan is auto or direct

w/out t/stat and auto fan

[pwuser150520264261]

one drawback of no tstat in winter is that whenever you go on the highway temp needle comes down to cool and when you stop it comes back to center this continuous variation in temperature is I think not good for engine in the long run

[Massive_One]

yes, that's why in my original reply to the question i mentioned doing this practice in summer season.

[Xulfiqar]

the major drawback of running no thermostat is running the engine in cold start conditions which means more fuel is going in and washing the cylinders down.

Please dont try to think you can out do the design engineers here. The thermostats job is to set the minimum temperature of the engine as quick as possible after startup (which is 85C) - the cooling fans job is to limit the maximum temperature (about 100-104C)

Coolant is used to prevent cavitation and corrosion. If you have neglected the system to the point of failure then the question is not if it will go bad, but when it will fail catastrophically.

[pwuser162557941033]

If your head gasket is leaking coolant, it can go into:

• The combustion chamber. If you have a very small leak you might not even be able to tell except that your coolant level is dropping. A large leak spews sweet smelling smoke or white smoke out the exhaust. Large enough and it'll wear your walls/rings out and steam-clean your pistons. Not good.
• The lubrication circuit. Which means you'll have chocolate milk for oil and very big problems on your hands.

My car is ancient and it doesn't have any of these problems. And I didn't go to any one mechanic that sorted it out for me, I had to do it myself.

• Found a radiator guy, asked him to make me a new radiator because there are no new manufactured ones available.
• Retrofitted new coolant hoses, cut to size from new ones made for other cars.
• Always bought new hoses and replaced every single one.
• I never once put water in the system, even if it meant wasting tons of money on coolant that was drained or contaminated by idiotic mechanics.
• Always had a thermostat installed. 88°C or 82°C, it never once overheated in the summer. Changed the thermostat at the slightest sign of a slow warmup or overheat condition.
• Made sure that it was working by obsessing over objective measurements.

Many more things. And commonly available PKDM cars can skip most of these steps because parts are plentiful and cheap, and they never see high RPM conditions and are used for average daily driving. Even with air conditioning, no matter what the age, no cars should lose coolant or overheat.

[pwuser150520264261]

when I got my car it was in winter season and previous owner was running without thermostat and direct fan and when I got on the highway I said no way this is how it's going to be so the first work that I got done on the car was installing new 82 degree tstat and making the fan auto, actually had to spend some money for the fan because running on direct some ic or some point in the ecu went haywire so it was not a simple wire cut twist and fan auto job

[pwuser150520264261]

some people say even if radiator fan is auto which is how it should be, when ac is on the radiator fan should work full time like the condenser fan, how true is that?

[pwuser162557941033]

I imagine it won't hurt anything if your condenser has extra airflow across its surface, but it might overcool the car or cause peculiarities with the mechanical design of the thermostat vs. the intended design temp of the system, especially if the system doesn't run like that by design.

Some cooling systems have the condenser in front of the radiator, running two fans on either side configured push-pull. Some of them have two fans for rad and condenser, with one or both running depending on the conditions. Some use one giant clutched workhorse fan for everything.

In either case, the way it was designed is usually the optimal way that it "should" be. If the fan turns on automatically with the radiator fan, great, but it might also turn off at speed to protect the motor, especially since the effect of air rushing into the car because of its own movement at speed is usually greater than any electric fan can provide.

I'll try it myself and see how the car behaves with the radiator fan constantly on. I know for a fact it causes my car to take way too long to warm up. It's definitely not good for my aging alternator. It's also not good for the fan motor to be forced into moving by anything other than its own power, which it will be at cruising speed.

My fan control setup is to turn on at 85°C, turn off at 80°C, regardless of whether the key is in the ignition. If I turn it off and park it and it needs to cool down, it'll do that on its own by turning the fan on for a little while. Most modern European cars do this.

[pwuser150520264261]

I think the constant load on the fan motor and alternator is the main issue here, on my car the condenser is in front of the radiator and it's fan is also on front whereas e.g on the 7th gen civic the condenser is also on the front but there's no fan on front rather two fans are behind the radiator I don't know how that works

[pwuser162557941033]

I think the control scheme on my 8th Gen is condenser fan always runs with AC, radiator fan runs when car is hot and when car is still, but not when car is moving. You can see what effect it has on your electrical system by measuring your system's voltage with and without the fan on.