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Overheating – All You Need To Know - Car Talk - Nairaland

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Overheating – All You Need To Know by automedicsnig: 7:22am On Sep 18, 2014
Those who have experienced it (overheating) before will definitely tell you that it is one incident that they don’t pray to witness again.

OVERHEATING is one word that has been on the lips of many people, it doesn’t knock before sweeping right through and when it does come in, it can be very tricky to diagnose.

Now for the benefit of those who have not witnessed the scenario before, I will give a quick description of what overheating is.

Overheating is a condition in which your engines temperature rises to a very critical level, usually above the middle of the gauge and towards the red line.

It arises as a result of a problem in the cooling system.

In one of our previous write-ups, we discussed the job of the cooling system in the vehicle and why it is important to take proper care of it.

The issue of overheating is actually not a fault, it is a symptom and it is at this junction that many mechanics and DIY’s get it wrong because they always try to solve the symptom instead of looking for the fault.

There are a whole lot of things that can cause overheating but we will be treating only one in this article, other causes will be treated in subsequent articles.

The very first on the list of causes that i will be discussing will be low coolant.

In the cooling system article, I discussed about coolant and its importance.

It is the lifeblood of the cooling system as it is the one that absorbs the heat from the engine. In a case where you have insufficient coolant, then the efficiency of the system is reduced and when this happens heat absorption becomes low thereby leaving this heat to build up in the engine.

A low coolant level can be caused by a leak either external or internal or from outright carelessness, although the latter is not all that common.

An external leak in the cooling system will be found around areas like the water hoses, the water pump, a leak in the radiator, or can even come from a leak in the coolant reservoir.

Sometimes a bad radiator cap will also result in this because it can no longer hold pressure so the coolant will keep flowing freely into the reservoir.

An internal leak will be a little more difficult to diagnose because it’s something you cannot see and it could be coming from anywhere in the system.

One good way to know that you have a leak is when you have to top your coolant every day. The very tricky thing about a leak in the system (especially an external leak) is that you will not notice the leak.

This is because the leak will only occur when the system is under pressure (except it is a very big one) and this pressure will be achieved when the engine is hot and coolant like any other fluid will evaporate at that temperature.

So what you will have is a case where as the coolant is leaking out it is evaporating and this is what at times confuses most mechanics and DIYs. Now someone must be wondering –“if I need pressure to detect the leak and I can’t do it while the engine is hot, then what do I do?”

Its pretty simple –a cooling system pressure test.

Those who are conversant with the radio program would have heard this phrase a couple of times. It is an automotive test that involves pressurizing the cooling system to a certain pressure, so as to simulate a driving condition.

When this happens it becomes easy to detect whether there is a leak and where it is coming from.

Coolant leak is just one of the many causes of overheating and now you know that checking your coolant is very important. When next you have an issue of overheating, you can go ahead to perform the test on your vehicle.

Other causes will be treated in subsequent articles.

18 Likes 2 Shares

Re: Overheating – All You Need To Know by nollyway(m): 7:54am On Sep 18, 2014
Op nice one... grin grin

1 Like 1 Share

Re: Overheating – All You Need To Know by BlackPeni5: 7:58am On Sep 18, 2014
OP...when your fan isn't working, it could also cause overheating

3 Likes 1 Share

Re: Overheating – All You Need To Know by Nobody: 7:58am On Sep 18, 2014
We'll get there

2 Likes 1 Share

Re: Overheating – All You Need To Know by DaBullIT(m): 7:59am On Sep 18, 2014
Over heating can be a traumatic experience

Possible causes for Overheating

No or Low coolant

Fan stopped working

Radiator is leaking

That's the summary

17 Likes 2 Shares

Re: Overheating – All You Need To Know by Nobody: 7:59am On Sep 18, 2014
Cool!
Re: Overheating – All You Need To Know by eemalex(m): 8:02am On Sep 18, 2014
Educate my son

1 Like 1 Share

Re: Overheating – All You Need To Know by lonelydora: 8:07am On Sep 18, 2014
Thanks
Re: Overheating – All You Need To Know by timilehing(m): 8:08am On Sep 18, 2014
Good
Re: Overheating – All You Need To Know by Nobody: 8:11am On Sep 18, 2014
Interesting!
Re: Overheating – All You Need To Know by Emilliw3m(m): 8:15am On Sep 18, 2014
"Overheating" ws hoping it would overheating of the womans body. Like wen she's overheating I.e on "heat" he heehe *wink*

Ama share this on naijacnn.com

1 Like 1 Share

Re: Overheating – All You Need To Know by Nobody: 8:16am On Sep 18, 2014
Nice one Op
Re: Overheating – All You Need To Know by BTT(m): 8:17am On Sep 18, 2014
DaBullIT: Over heating can be a traumatic experience

Possible causes for Overheating

No or Low coolant

Fan stopped working

Radiator is leaking

That's the summary

and

A dislodged/cut fan belt

1 Like

Re: Overheating – All You Need To Know by nikkypearl(f): 8:17am On Sep 18, 2014
Nice 1
Re: Overheating – All You Need To Know by Nobody: 8:18am On Sep 18, 2014
Btw I don't always check what causes overheating. I assume that all are caused when the water leaks.
Re: Overheating – All You Need To Know by Lilimax(f): 8:20am On Sep 18, 2014
Nice write up
Thanks for sharing @ OP
Re: Overheating – All You Need To Know by Nobody: 8:23am On Sep 18, 2014
BTT:

and

A dislodged/cut fan belt

yes. You are right.
Re: Overheating – All You Need To Know by chanx: 8:23am On Sep 18, 2014
Op. That is very informative. Thank you
Re: Overheating – All You Need To Know by justitiaomnibus(m): 8:24am On Sep 18, 2014
OP, tenk.

But does overheating knok a car engine?

If yur car engine knoks, wht is the best solution? Is it buying a new engine or repairing the knokd one by changing gaskets and what av u...

Once again, tenk.
Re: Overheating – All You Need To Know by Nobody: 8:24am On Sep 18, 2014
Emilliw3m: "Overheating" ws hoping it would overheating of the womans body. Like wen she's overheating I.e on "heat" he heehe *wink*
see your life! Lol!
Re: Overheating – All You Need To Know by samseen02(m): 8:25am On Sep 18, 2014
ok
Re: Overheating – All You Need To Know by Nobody: 8:27am On Sep 18, 2014
BlackPeni5: OP...when you fan isn't working, it could also cause overheating
sure...it does.
Re: Overheating – All You Need To Know by experimentist: 8:31am On Sep 18, 2014
automedicsnig: Those who have experienced it (overheating) before will definitely tell you that it is one incident that they don’t pray to witness again.

OVERHEATING is one word that has been on the lips of many people, it doesn’t knock before sweeping right through and when it does come in, it can be very tricky to diagnose.

Now for the benefit of those who have not witnessed the scenario before, I will give a quick description of what overheating is.

Overheating is a condition in which your engines temperature rises to a very critical level, usually above the middle of the gauge and towards the red line.

It arises as a result of a problem in the cooling system.

In one of our previous write-ups, we discussed the job of the cooling system in the vehicle and why it is important to take proper care of it.

The issue of overheating is actually not a fault, it is a symptom and it is at this junction that many mechanics and DIY’s get it wrong because they always try to solve the symptom instead of looking for the fault.

There are a whole lot of things that can cause overheating but we will be treating only one in this article, other causes will be treated in subsequent articles.

The very first on the list of causes that i will be discussing will be low coolant.

In the cooling system article, I discussed about coolant and its importance.

It is the lifeblood of the cooling system as it is the one that absorbs the heat from the engine. In a case where you have insufficient coolant, then the efficiency of the system is reduced and when this happens heat absorption becomes low thereby leaving this heat to build up in the engine.

A low coolant level can be caused by a leak either external or internal or from outright carelessness, although the latter is not all that common.

An external leak in the cooling system will be found around areas like the water hoses, the water pump, a leak in the radiator, or can even come from a leak in the coolant reservoir.

Sometimes a bad radiator cap will also result in this because it can no longer hold pressure so the coolant will keep flowing freely into the reservoir.

An internal leak will be a little more difficult to diagnose because it’s something you cannot see and it could be coming from anywhere in the system.

One good way to know that you have a leak is when you have to top your coolant every day. The very tricky thing about a leak in the system (especially an external leak) is that you will not notice the leak.

This is because the leak will only occur when the system is under pressure (except it is a very big one) and this pressure will be achieved when the engine is hot and coolant like any other fluid will evaporate at that temperature.

So what you will have is a case where as the coolant is leaking out it is evaporating and this is what at times confuses most mechanics and DIYs. Now someone must be wondering –“if I need pressure to detect the leak and I can’t do it while the engine is hot, then what do I do?”

Its pretty simple –a cooling system pressure test.

Those who are conversant with the radio program would have heard this phrase a couple of times. It is an automotive test that involves pressurizing the cooling system to a certain pressure, so as to simulate a driving condition.

When this happens it becomes easy to detect whether there is a leak and where it is coming from.

Coolant leak is just one of the many causes of overheating and now you know that checking your coolant is very important. When next you have an issue of overheating, you can go ahead to perform the test on your vehicle.

Other causes will be treated in subsequent articles.
ose omo iya mi

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