Monday – Friday : 08:00 – 17:30
Saturday – Sunday : Closed

1715 Dandenong Road
Oakleigh East VIC 3166

One of the vital systems in a car responsible for a comfortable drive is the car air conditioning system. Having a less than optimum air-con system is not anyone’s idea of a pleasant drive, especially during Australian summers. At CT Motors, we specialise in complete car air conditioning repair and re-gas to ensure that your air-con works efficiently in cooling the car’s insides.

Our fully qualified, trained and highly skilled team of auto specialists will make a thorough diagnosis of your air-con and provide:

  • High-quality car air conditioning services that include checking for the refrigerant level
  • Potential leak areas
  • Repair and fitment of air-con parts

Over time car air conditioning systems become less efficient due to factors such as insufficient use, worn out seals and minor leaks in the system. To maintain your system at peak efficiency it is recommended that you have your air conditioning serviced annually.

If you suspect your air conditioning is not performing effectively or you have not had it serviced in the last 12 months give us a call today for an aircon regas quote and service.


If you have a problem with your aircon, AC, Climate Control or car heating system phone us to arrange for a full performance test and system diagnosis. The issue may only require aircon regas, it may just be a small leak or perhaps a little more severe. By carrying out an air conditioning system diagnosis test we will be able to pin point the issue from the start.

At CT Motors we are car air conditioning specialists. In fact, we have a full understanding of air conditioning in all vehicles be it cars, vans, motor home and or trucks. Our certified and trained technicians auto electricians will diagnose and repair the faults that main dealers and mechanics cannot find. If the system is beyond repair we will always advise you before carrying out any further work. Once we have your consent to proceed we will make all the necessary repairs and your vehicle will be returned back to you fully repaired and tested.

What happens in a car air conditioning service?

  • Inspection of drive belts and pulleys
  • Check operation of valves and thermostats
  • Inspection of hoses and components
  • Evacuate system and recover refrigerant (weigh amount and record)
  • Add required amount of refrigerant oil
  • Charge system with recommended refrigerant type and capacity (if required)
  • Condenser temperature check
  • Suction line temperature reading
  • Leak test system lines and components with an electronic leak detector
  • Run vehicle to check air vent temperature and report

Learn More >>> Air-Conditioning Service-Get Your Car ready For Summer

Engine coolant, also known as antifreeze, is a heat transfer fluid designed to remove excess heat from your engine. It’s made up of a combination of ethylene or propylene glycol and water, normally in a 50/50 ratio. Engine coolants come in many different types. When it comes to picking the right engine coolant for your car, all you have to do is grab the one your owner’s manual recommends.

The engine creates a lot of energy and heat while the car is moving. It’s the job of the exhaust and cooling system to make sure the engine stays cool. The coolant absorbs the heat from the engine and stops the engine water from boiling in the summer. In addition, it also ensures metal parts don’t rust and rubber or plastic parts don’t corrode.

Without the coolant, the heat produced during constant internal combustion would ruin the engine very quickly. Although coolant is mixed with water, the water alone isn’t able to keep the engine cool. The heat of the engine would eventually start boiling the water, or the summer heat would evaporate it.

Coolant flushes provide many benefits to your cooling system. It is important to maintain your cooling system, just like every other part of your automobile, which is why we recommend a coolant flush once a year to keep your cooling system working effectively.

What are the benefits of a coolant flush?
Coolant flushes remove rust and scale deposits, which build up over time. It’s important to get rid of these deposits because they can cause overheating and damage your entire cooling system.
The new anti-freeze contains additives that work to lubricate your automobile’s water pump, which can help extend the life of your water pump.
The additives in the new anti-freeze also help prevent rust from building up in the water pump, which allows the cooling system to operate more efficiently. Over time, the old anti-freeze loses its anti-corrosive properties, which allows for contaminants to build up in the cooling system. Getting a coolant flush will completely clean these particles from the system.
When you get a coolant flush, it is also common to receive an inspection of your entire cooling system including the thermostat, radiator and all hoses and belts. This is beneficial because it checks for leaks and other potential problems.
Getting a coolant flush will prevent the old anti-freeze from becoming acidic. This is important because once it starts to become acidic it will break down and can damage the bearing in the water pump, the rubber hoses and the aluminum components of the engine.
Radiators are used for cooling internal combustion engines, mainly in automobiles but also in piston-engine aircraft, railway locomotives, motorcycles, stationary generating plants and other places where heat engines are used. The typical North American electricity transformer, be it in a power substation or atop a pole, uses coolants such as polychlorinated biphenyl oil to discharge excess heat to the environment.

To cool down the heat engine, a coolant is passed through the engine block, where it absorbs heat from the engine. The hot coolant is then fed into the inlet tank of the radiator (located either on the top of the radiator, or along one side), from which it is distributed across the radiator core through tubes to another tank on the opposite end of the radiator. As the coolant passes through the radiator tubes on its way to the opposite tank, it transfers much of its heat to the tubes which, in turn, transfer the heat to the fins that are lodged between each row of tubes. The fins then release the heat to the ambient air. Fins are used to greatly increase the contact surface of the tubes to the air, thus increasing the exchange efficiency. The cooled coolant is fed back to the engine, and the cycle repeats. Normally, the radiator does not reduce the temperature of the coolant back to ambient air temperature, but it is still sufficiently cooled to keep the engine from overheating.

This coolant is usually water-based, with the addition of glycols to prevent freezing and other additives to limit corrosion, erosion and cavitation. However, the coolant may also be an oil. The first engines used thermosiphons to circulate the coolant; today, however, all but the smallest engines use pumps.

Up to the 1980s, radiator cores were often made of copper (for fins) and brass (for tubes, headers, and side-plates, while tanks could also be made of brass or of plastic, often a polyamide). Starting in the 1970s, use of aluminium increased, eventually taking over the vast majority of vehicular radiator applications. The main inducements for aluminium are reduced weight and cost.

Since air has a lower heat capacity and density than liquid coolants, a fairly large volume flow rate (relative to the coolant’s) must be blown through the radiator core to capture the heat from the coolant. Radiators often have one or more fans that blow air through the radiator. To save fan power consumption in vehicles, radiators are often behind the grille at the front end of a vehicle. Ram air can give a portion or all of the necessary cooling air flow when the coolant temperature remains below the system’s designed maximum temperature, and the fan remains disengaged.
The water pump, also known as the coolant pump, is the heart of the engine’s cooling system. It is the water pump’s job to regulate the coolant flow rate, and to constantly circulate coolant throughout the engine and cooling system.

Most water pumps have seven basic components:
HOUSING – The housing is the outer shell that encases the water pump. It is typically made of cast iron or aluminum, although many modern engines use stamped-steel housings. The housing has a weep hole: a small hole that allows any coolant that may be leaking from a faulty seal to escape, thereby preventing it from becoming trapped and forced into the water pump bearing assembly. The weep hole is just a few millimeters in diameter and is located on the top, side, or bottom of the housing unit between the hub and water pump seal.
IMPELLER – The impeller is located inside the housing and is connected to the bottom of the shaft. It may be metal or plastic. The impeller spins and distributes coolant throughout the cooling system at a rate determined by the engine RPMs. SHAFT – The water pump shaft rides against the bearing with the impeller connected on the bottom and a hub or pulley connected to the top. BEARING – The bearing assembly, which rotates with the shaft, is the mechanical support that allows the stable, controlled, and continuous rotation of the shaft.
HUB or PULLEY – Attached to the top of the shaft is the hub or pulley, which is the connecting source of power for impeller rotation. The engine’s serpentine, V-belt, or timing belt is typically connected to this.
SEAL – The seal goes around the shaft and protects the bearing assembly from coolant and contaminates. If this seal fails, coolant will leak out of the weep hole.
MOUNTING GASKET – The mounting gasket seals the water pump to the engine. Amazingly, a typical automotive water pump can move up to 7,500 gallons of coolant per hour and can recirculate the coolant in the engine over 20 times per minute when operating at peak RPMs. This means your vehicle’s water pump operating at peak capacity could empty a typical private swimming pool in about an hour! The speed of the water pump is determined by the speed of the engine, therefore the slower the engine speed, the less it pumps. However, even at 35 mph, a typical water pump can still move about 2,000 gallons per hour!

As engine RPMs increase, more heat is produced by the engine and more cooling capacity is required. The water pump impeller speed increases as the engine RPMs increase to provide extra coolant flow as needed.

A failing water pump can cause an engine to overheat and leave you stranded. Be sure to inspect the water pump, coolant, and belt drive system that drives the water pump at each service interval to prevent these and other issues.

All mechanical water pumps work in basically the same way and are driven via the rotation of the engine’s crankshaft, although this can be accomplished in several ways. Mechanical energy is transferred from the crankshaft to the water pump, typically via an accessory or serpentine belt. In some cases, a water pump will be powered by a camshaft, although the camshaft itself is powered by the crankshaft via a belt or chain. A water pump may also be driven by a timing belt rather than an accessory or serpentine belt. In any case, the rotation of the water pump shaft is used to induce the circulation of coolant through the cooling system. Coolant is typically drawn into the water pump from the engine block and directed into the radiator. There it passes through thin tubes that are designed to provide as much surface area as possible to cool the hot liquid. The liquid then travels back into the engine cylinder head and block where it can pull additional heat out of the engine. The water pump continues this process the entire time the engine is running. Water pumps will eventually wear out and fail. Whether you are purchasing a used vehicle or having a general inspection performed on your own vehicle, common points of failure should be inspected. These inspection points include an inspection for leaks (seal, gaskets, weep hole), checking for water pump bearing looseness or noise, a visual inspection and testing of the coolant condition, and inspecting the belt and tensioning system driving the pump.LEAKS (SEAL, GASKETS, WEEP HOLE)Leaks are the most common reason for water pump failure. The water pump seal protects the bearing assembly from being exposed to and contaminated by coolant, and it confines the coolant within the water pump housing and cooling system. The water pump mounting gasket ensures coolant transfers from the engine to the pump without external leakage.

There are three main conditions that can lead to water pump seal and gasket leakage and failure:
OVERHEATING OF ENGINE – Excessively high operating temperature of the engine is a serious issue. An overheated engine operated with low levels of coolant can result in warping and heat damage to elastomeric seal components and gasket material. Boiling of fluid can also damage and distort seals and gaskets.
COOLANT CONDITION – Abrasive or acidic contaminants in coolant can damage gaskets and seals. Contaminating factors include high acid content and debris such as rust or dissolved particles from system components.
MECHANICAL CONDITIONS – These conditions may include excessive bearing play, incorrect seal installation, excessive vibration due to misalignment of belts, pulleys, or even a defective fan clutch or damaged fan blade.

We are fully equipped with the latest state-of-the-art tools to work on all kinds of makes and models, especially prestige cars.

Car air conditioning repair requires a specialist professional with deep knowledge of the various hoses and seals that may be compromised due to an unused air con during winter. As a result, it leads to cracking and becomes a point of refrigerant leaks. For proficient car air conditioning services and repairs, trust CT Motors experts in auto repair technicians.

At CT Motors, our focus is on achieving the highest customer satisfaction and providing unparalleled service quality. Through all our car air conditioning services and other auto repairs, we strive to reduce the frequency of any air con issues with inexpensive preventive maintenance with regular car services.

Superior Car Air Conditioning Service at Competitive Prices

At CT Motors, we do a thorough checking of your car’s air-con during our regular car air conditioning maintenance services, which include the following:

  • Complete inspection to check if the air-con gas and oil are optimally circulated throughout the system
  • Complete service and replacement of the receiver dryer if necessary
  • Ensure the performance of the drive belt is optimal and it’s physically in good condition
  • Check for leaks and re-gas if the levels are low


Before we undertake car air conditioning repair and services, we do thorough diagnostics to determine the existing condition of the systems. Then, we will suitably advise you about the possible solutions and give you a no-obligation quote for the car air conditioning repair and services.

Our qualified mechanics do the following car air-conditioning service :

  • The condenser, air vents and the reading on the suction line temperatures are inspected
  • Pulleys, drive belt adjustments, hoses and air conditioning systems components are checked
  • Thermostat and valves operations are checked
  • Check for any potential leaks using sophisticated electronic equipment
  • Condenser fins are cleaned, and the air-conditioner is sanitised and deodourised


The next time your car’s air con isn’t providing the best cooling and needs expert car air conditioning repairs and services, book a no-obligation test and air-con diagnosis from CT Motors. We are sure to WOW you with our superior quality services backed with years of experience and in-depth knowledge.


How often does car air conditioning need to be serviced?

Expert suggests that the best time-interval for your car air conditioning services is every 1 to 2 years. Most people get a yearly check of the air-con months before summers start, so they aren’t caught off-guard.

What does car AC service include?

A car AC service includes checking all the vital components of the air-con system, such as the gas and oil level, drive belts, pulleys, operational valves, thermostats, and hoses. The system is checked for potential leaks, and re-gas is done to top up the levels.

How much does it cost to replace car AC refrigerant?

Replacing car AC refrigerants with an experienced and expert auto specialist would cost around $110 $160. Of course, only replacing AC refrigerant is $100, but any mechanic worth their reputation is sure to check for whole system performance and perform minor repairs.

Why is my car air conditioner not blowing cold air?

The most common reason behind low performing car air conditioners is low levels of AC refrigerant or condenser issues. Any leak in the system could bring down the cooling levels of the AC, and the best course of action is to get car air conditioning services done by our reputed and reliable mechanic.

Book an obligation free test today

Monday – Friday : 08:00 – 17:30
Saturday – Sunday : Closed

1715 Dandenong Road
Oakleigh East VIC 3166