Overheating and mitigation methods

[oj88]

Lately, I've been seeing a number of ads in my Feeds about a certain aftermarket high-CFM auxiliary fan being sold either as an upgrade to the OE aux fans or as a bolt-on to complement vehicles with traditional belt-driven fans. My first reaction was, these fans make a lot of noise and seems overkill.

But then I recalled this video from 2023 about "stalled" cars going to Baguio in bumper-to-bumper traffic (credit to its owner): https://www.facebook.com/share/v/19arRvX9LR/

Based on the video and despite what the owner is saying, it's not perfectly conclusive whether or not every car shown on the side of the road suffered from overheating.... BUT, it does look like it at face value (hood's up, some people tinkering in the vicinity of the radiator, etc.). Whether that's wholly or partly true, I want to hear your take on it.

I've always believed that most modern cars are designed to operate in virtually any conditions. My hypothesis however, is that the high elevation, and hence lower air pressure and density, has a lot to do with it. Less air molecules makes the cooling system struggle to shed heat. So maybe those aftermarket aux fans CAN help under these conditions.

[ice15]

For modern cars... people forget that coolants have a lifespan and that they need to be replaced.

Same with the fans, a 5 year old fan is not as strong as it used to be.


We have a tita with a 10 year old Vios. And the car has a chance of overheating when the engine is working hard (going uphill - kahit Antipolo lang). All fans are working.

I told her to replace both fans and have the coolant replaced.

After a week... she told me na summer lang naman daw umiinit car nya.

[oj88]

For modern cars... people forget that coolants have a lifespan and that they need to be replaced.

Same with the fans, a 5 year old fan is not as strong as it used to be.


We have a tita with a 10 year old Vios. And the car has a chance of overheating when the engine is working hard (going uphill - kahit Antipolo lang). All fans are working.

I told her to replace both fans and have the coolant replaced.

After a week... she told me na summer lang naman daw umiinit car nya.

I have a digital gauge that measures, among other things, engine coolant temp. 90% of the time, it's pegged at 85°C and the highest it's ever been was 87°C. I imagine that anything higher than 90°C would be something I'd be concerned about.

[baludoy]

^ Ako I just use the good ole mini elm327 OBD2 scanner. Pero usually sa long drives ko Lang ginagamit.

It's the a/t transmission temp that i pay attention to for some reason.

[dr. d]

in manila, water boils at 100 degrees centigrade.
in baguio, water boils at 95 degrees centigrade.

[Motortrend]

in manila, water boils at 100 degrees centigrade.
in baguio, water boils at 95 degrees centigrade.

Because of the cooler climate? I kid, I kid!

[oj88]

in manila, water boils at 100 degrees centigrade.
in baguio, water boils at 95 degrees centigrade.

That makes sense. Higher elevation has lower atmospheric pressure and even if the cooling system is sealed, will result in a lower absolute pressure... reducing the boiling point of water and/or the coolant.

A coolant mix adds about 25-30°C to the boiling point of water.

You hardly see anyone overheating in the worst Metro Manila traffic (except those with actual engine problems). But then you see all those stalled vehicles heading for Baguio... I love science. :D

[ice15]

Balikan ko itong first post...

Lately, I've been seeing a number of ads in my Feeds about a certain aftermarket high-CFM auxiliary fan being sold either as an upgrade to the OE aux fans or as a bolt-on to complement vehicles with traditional belt-driven fans. My first reaction was, these fans make a lot of noise and seems overkill.

Yung mga kilala ko na naka 300cc Vespa na used for their regular commute decided to put an additional aux fan to blow the hot air out. The extra fan is not as strong as the original ones, pero its only used to complement the stock fans.

***

Nung may taxi pa kami (90's). Every summer, we diverted the windshield washer to spray water to the radiator.

[carxynogen]

Lately, I've been seeing a number of ads in my Feeds about a certain aftermarket high-CFM auxiliary fan being sold either as an upgrade to the OE aux fans or as a bolt-on to complement vehicles with traditional belt-driven fans. My first reaction was, these fans make a lot of noise and seems overkill.

But then I recalled this video from 2023 about "stalled" cars going to Baguio in bumper-to-bumper traffic (credit to its owner): https://www.facebook.com/share/v/19arRvX9LR/

Based on the video and despite what the owner is saying, it's not perfectly conclusive whether or not every car shown on the side of the road suffered from overheating.... BUT, it does look like it at face value (hood's up, some people tinkering in the vicinity of the radiator, etc.). Whether that's wholly or partly true, I want to hear your take on it.

I've always believed that most modern cars are designed to operate in virtually any conditions. My hypothesis however, is that the high elevation, and hence lower air pressure and density, has a lot to do with it. Less air molecules makes the cooling system struggle to shed heat. So maybe those aftermarket aux fans CAN help under these conditions.

Yung extra AUX Fan is useful sa mga naka montero.
Mag improve daw yung AC system since may extra compartment daw na lalagyan ng AUX Fan for AC.
Not sure if this also helps mitigates the overheating or helps compliments the cooling system of the engine.
Since may independent AUX fan na for AC if pa installan nyo.

Hindi lang nilagyan ng Mitsubishi para maka tipid.
Is this true Montero owners?