Hot/Cold Flashes? Air Conditioner needs some love.

Audi AC refill and air conditioning testing
Audi AirCon Refill at EuroSurgeon

What Do Unevenly Hot or Cold Spots in air conditioner Mean?

We are living in a world where we can do many things that were once believed to be impossible, and controlling the car temperature is one of those. Air conditioner has changed our way of living because today, we don’t need to cope with the scorching heat of summers. There’s no need to worry about what the outside temperature is with air conditioner. The only concern with air-conditioning systems is that they start misbehaving when used inappropriately.

BMW Air Conditioning

Now the question is, what’s the reason behind the presence of hot or cold spots in vents? It is because your air-conditioner is failing to maintain a balanced airflow in your system and you might need an AC service. Generally, manufacturers suggest this should occur every 2 years. 

So, why is Air Conditioner temperature being uneven?

Just why is your air-conditioner unable to maintain an equally balanced temperature?

  • Reason 1: Refrigerant level is low – this is the most common reason for an inefficient system
  • Reason 2: Your air-conditioning system has a fault. This could be as simple as a faulty temperature sensor, through to a blocked thermal expansion (TX) valve.

Symptoms of AC needing help.

Points to look out for which will indicate an issue include:

  • Hissing sounds from the vents while using your AC
  • Difficulty demisting the front windscreen
  • Blowing warm air from one side
  • A flashing AC light

If you have any of these symptoms get in touch sooner rather than later. Your refrigerant is also the lubrication for your air conditioner compressor, so if this is low you are risking damaging the system further every time you use the AC.

At EuroSurgeon Service centre our team would be happy to inspect and diagnose any air conditioning repairs. We work with most major mechanical warranty companies,

Give us a call today to see what we can do for you! 0800 269 675 Contact us

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Time for Detox – Carbon Build up cleaning and nuts.

Carbon buildup cleaning
Before and after walnut blast

What is carbon and why does it build up?

Carbon build up is a relatively new issue. Carbon is a mixture of by products. Modern vehicles use direct injection for efficiency, as well as exhaust gas recirculation (EGR) and positive crankcase ventilation (PCV) effectively which effectively pump dirty air into the intake manifold full of engine fumes, this ensures great efficiency for emissions. Without going too technical – The video below explains it in simple terms.

Why do i need it?

Early vehicles pumped fuel to back of the valves, called port injection, this had cleaning agents in the fuel, and as the fuel hit the back of the valve helped keep the ports and valves clean. This no longer happens with direct injection engines, because the injector is no longer spraying the intake valves.

Difference between direct injection and port injection
Port Injection VS Direct Injection

Walnut blasting VS the rest.

There are a few methods the industry can use to clean carbon buildup. Hydrogen oxygen, fuel additives – even an intake spray can. Unfortunately there is no way to eat away at the solid carbon build up that forms around the valves and ports without physically accessing them to blast them clean. Walnut blasting enables us to do just that, and the before and after results speak for themselves.

Will walnut damage my car?

Carbon cleaning uses walnut solely because it is a non abrasive media, meaning should any get in the cylinder it will just burn or get blown out the exhaust valves without causing any damage.

walnut shell media
Walnut blasting media

Noticeable difference? YES.

The luxury of having a dyno in our performance centre, we have managed to measure the benefits. One example was a 4.2l Audi RS4, we recover through maintenance, simply new spark plugs, and walnut blasting 50whp, close to 20% recovered power.

Tuned BMW 335i with N54 stage 2 engine can gain up to 50-60hp from carbon cleaning, by eliminating the flow restrictions caused by excessive carbon build up.


What cars benefit? Most of the Direct injection vehicles, which essentially is almost every vehicle made after 2006. Cars that have severe build up issues: BMW 335i with N55 and N54 engines. Audi B7 RS4 with 4.2 V8. Supercharged 3.0 TFSI Audis, Mercedes C63 with M156 naturally aspirated 6.2 V8 engine. 2.0 Turbo VW Range.

How long will it take? Depending on the vehicle, this can often be completed in a day.

Packages? Yes, talk to one of our crew members. We could tailor a package with servicing, repairs, carbon cleaning, Dyno logging and tuning all at the same time.

How do i get it done? Give us a call or message today to get you carbon buildup sorted! Contact us

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Mercedes C220 CDI – AdBlue and Performance

Mercedes adblue and performance
Bluetec Mercedes at EuroSurgeon Performance

Can a little Mercedes C220 CDI hide some extra power from you? Yes – it can and it does. It hides at least +50HP and +60Nm of torque.

Small diesel engines have traditionally been the staple of VW, but Mercedes has their own answer now. Their small, efficient and well-rounded 2200CC diesel unit can be found in the W205 C220 CDI (or C250 CDI as it’s known in Europe) – the same power plant is spread between a few different shapes.

When you get to drive one, you get a feeling that it’s nice. However there are no other words that come to mind. Just…nice. Not exciting, not quick. Just…nice. The sort of feeling you get from a plain rice cracker – it lacks a topping. Any topping!

Let’s take a look at the Mercedes C220 CDI we had in the workshop. This car got delivered as a non-runner after sitting for two years outside. The poor rice cracker grew some mould and became home for little spider family.

W205 C220 CDI brought back to life.

Why AdBlue Doesn’t Work…

One of the major issues with cars that are equipped with the AdBlue additive system? – The fluid is highly corrosive and dries out. Dried out AdBlue turns into strong crystallized mesh. In turn, this jams the AdBlue tank level sensor, and because the sensor is a non-serviceable item welded to the tank itself, the repair is usually north of $6,000+GST. As an option, we can switch it off and the car will not have it any longer.

Give us a call today to see what we can do for you! 0800 269 675 Contact us

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