Car is overheating Inspection

Categories:Diagnostics, Engine (Under the Hood), Popular Diagnostics

How this system works:

The cooling system is your engine's life support. It works as a continuous cycle: a mixture of antifreeze and water (coolant) circulates through the engine block to absorb the massive heat generated by combustion and friction. This hot liquid is then pumped to the radiator, where air dissipates the heat before the cooled liquid heads back to the engine. In South Africa, where summer temperatures often soar and city traffic like the M1 or N1 can be "stop-and-crawl," this system is under constant pressure. If it fails and is ignored, an engine can literally "melt" into a solid, useless block of metal in minutes.

Warning signs you need this service

The Rising Needle: Your temperature gauge is climbing toward the "H" or the red zone.
Steam from the Bonnet: Visible white vapor escaping from the engine bay (this is actually boiling coolant).
The "Sweet" Smell: A distinct, syrup-like odor of hot antifreeze.
Low Coolant Light: Your dashboard is warning you that the "sealed" system has lost its liquid.
Ticking Noises: An engine running too hot may produce a loud metallic ticking sound as the oil thins out and loses its lubricating properties.

Common reasons for this to happen:

An engine will overheat any time the cooling system is malfunctioning (i.e., when the coolant doesn’t absorb, transport, and dissipate heat effectively). Diagnosing the reason why your cooling system is on the fritz is more complex, but there are several common culprits of an overheating engine:

Low coolant: Although said above, it is worth reiterating: Your engine relies on coolant to dissipate heat. If you don’t have enough coolant running through the system due to leaks, ruptured hoses, loose hose clamps, whatever heat will build up, and your engine will overheat. So check the coolant level regularly, make sure the ratio of water to antifreeze is correct per your owner’s manual, and have it changed every year. If the coolant is low, do not just top it off and forget about it. The cooling system is sealed and the coolant had to go somewhere. It may have leaked outside the engine and you just can’t see it yet or it has leaked inside the engine where you normally would not see it, but it had to go somewhere.
Bad cooling fan: A cooling fan draws air through your radiator when your car isn’t going fast enough to ram it through on its own, such as in slow-moving traffic. A simple way to diagnose whether there is a problem with the fan is to let your car idle long enough to heat up. Then, look under the hood to see if it is running. If it’s not, call a mechanic immediately.
Faulty thermostat: If your car regularly overheats at highway speeds, have the thermostat checked by a mechanic. But at highway speeds, your engine is doing a lot of work and needs a lot of help to keep from losing its cool. If the thermostat doesn’t open, not enough coolant will flow through the engine to keep it cool.
Plugged coolant passageways: Your car’s radiator and cooling system need to be clean to be cool. Over time, the radiator builds solid deposits that can clog it and prevent the coolant from circulating properly. A quick, inexpensive radiator flush every year can keep the system in shape.

How it’s done:

Diagnostic Scan: The professional first checks the car’s onboard computer (PCM) for any "Coolant Temperature" or "Fan Circuit" fault codes.
Pressure Test: A specialized pump is attached to the radiator or reservoir to pressurize the system. This forces hidden leaks—like those behind the engine or under the intake manifold—to reveal themselves.
Visual Inspection: The mechanic meticulously checks every hose, the radiator tanks, and the water pump for signs of "crusty" residue or mechanical damage.
Functional Testing: The engine is run to ensure the thermostat opens at the correct temperature and the cooling fan kicks in when it should.
Head Gasket Check: The professional looks for indications of major internal issues, such as oil in the coolant or "milky" residue on the oil cap.

What to expect:

A top-rated mobile mechanic will come to your home or office to inspect the entire cooling system and determine the source and cause of the overheating issue. The mechanic will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How important is this service?

Lack of cooling system maintenance is the number one cause of engine failure worldwide — not only in automobiles, but also in motorcycles, boats, and generators. In the ‘70s, there were issues with bearing failures. In the ‘80s, there were problems with pistons. In the ‘90s, the main problems were focused on oil consumption. Thanks to advancements is metallurgy, engineering, and manufacturing techniques, those failures are all a thing of the past. Keep clean oil in your engine and keep the engine cool, and it will enjoy a very long life of service.

Keep in mind

NEVER Open a Hot Radiator: The system is under high pressure. Opening it while hot can result in severe steam burns. Wait at least 30 minutes for it to cool.
Distilled Water Only: If you must top up, use distilled water and the correct antifreeze. South African tap water contains minerals that will eventually clog your radiator.
Don't Just Top It Off: If the coolant is low, it went somewhere. The system is sealed; a leak always exists, even if it's "internal."
Check the Fan: A simple DIY check is to turn on your Aircon. On most cars, this should force the radiator fan to start spinning immediately.

Pricing

Pricing varies based on your vehicle

Request Quote

Service Info

Typical Duration: 1 hour
Diagnostic Required: No

Car is overheating Inspection

Categories:Diagnostics, Engine (Under the Hood), Popular Diagnostics

Request Quote

How this system works:

Warning signs you need this service

The Rising Needle: Your temperature gauge is climbing toward the "H" or the red zone.
Steam from the Bonnet: Visible white vapor escaping from the engine bay (this is actually boiling coolant).
The "Sweet" Smell: A distinct, syrup-like odor of hot antifreeze.
Low Coolant Light: Your dashboard is warning you that the "sealed" system has lost its liquid.
Ticking Noises: An engine running too hot may produce a loud metallic ticking sound as the oil thins out and loses its lubricating properties.

Common reasons for this to happen:

Low coolant: Although said above, it is worth reiterating: Your engine relies on coolant to dissipate heat. If you don’t have enough coolant running through the system due to leaks, ruptured hoses, loose hose clamps, whatever heat will build up, and your engine will overheat. So check the coolant level regularly, make sure the ratio of water to antifreeze is correct per your owner’s manual, and have it changed every year. If the coolant is low, do not just top it off and forget about it. The cooling system is sealed and the coolant had to go somewhere. It may have leaked outside the engine and you just can’t see it yet or it has leaked inside the engine where you normally would not see it, but it had to go somewhere.
Bad cooling fan: A cooling fan draws air through your radiator when your car isn’t going fast enough to ram it through on its own, such as in slow-moving traffic. A simple way to diagnose whether there is a problem with the fan is to let your car idle long enough to heat up. Then, look under the hood to see if it is running. If it’s not, call a mechanic immediately.
Faulty thermostat: If your car regularly overheats at highway speeds, have the thermostat checked by a mechanic. But at highway speeds, your engine is doing a lot of work and needs a lot of help to keep from losing its cool. If the thermostat doesn’t open, not enough coolant will flow through the engine to keep it cool.
Plugged coolant passageways: Your car’s radiator and cooling system need to be clean to be cool. Over time, the radiator builds solid deposits that can clog it and prevent the coolant from circulating properly. A quick, inexpensive radiator flush every year can keep the system in shape.

How it’s done:

Diagnostic Scan: The professional first checks the car’s onboard computer (PCM) for any "Coolant Temperature" or "Fan Circuit" fault codes.
Pressure Test: A specialized pump is attached to the radiator or reservoir to pressurize the system. This forces hidden leaks—like those behind the engine or under the intake manifold—to reveal themselves.
Visual Inspection: The mechanic meticulously checks every hose, the radiator tanks, and the water pump for signs of "crusty" residue or mechanical damage.
Functional Testing: The engine is run to ensure the thermostat opens at the correct temperature and the cooling fan kicks in when it should.
Head Gasket Check: The professional looks for indications of major internal issues, such as oil in the coolant or "milky" residue on the oil cap.

What to expect:

How important is this service?

Keep in mind

NEVER Open a Hot Radiator: The system is under high pressure. Opening it while hot can result in severe steam burns. Wait at least 30 minutes for it to cool.
Distilled Water Only: If you must top up, use distilled water and the correct antifreeze. South African tap water contains minerals that will eventually clog your radiator.
Don't Just Top It Off: If the coolant is low, it went somewhere. The system is sealed; a leak always exists, even if it's "internal."
Check the Fan: A simple DIY check is to turn on your Aircon. On most cars, this should force the radiator fan to start spinning immediately.

Pricing

Pricing varies based on your vehicle

Request Quote

Service Info

Typical Duration: 1 hour
Diagnostic Required: No

Car is overheating Inspection - Quotes from Trusted Mechanics | Fixxr - South Africa's Trusted Mechanic Platform