Superior Radiators Newsletter – Issue #6

Welcome to our latest newsletter.  We hope you enjoy reading this edition.  We would love to hear from you if you have a story, announcement or any contribution to the newsletter.  Please forward any suggestions and contributions to

A word from the director ….

With winter now here, is your vehicle ready for the cold?  Now is a good time to check your anti-freeze if you’re heading to the snowfields over the next few months.  It might also be a good idea to check that your heater, demister and wipers are functioning correctly.


We are always available for technical or fault diagnosis assistance.  Our motto here is “Superior Radiators has all your cooling needs covered”, so feel free to contact us with any of your cooling/heating queries.

Mark O’Sulivan

Some recent works

A customer sent us an intercooler / charge air cooler to suit a Hitachi ZX870 recently.  We were able to have a replacement core manufactured and recore the existing unit using the original manifolds.


We are able to offer this service for all excavator intercoolers / charge air coolers including CAT, Komatsu, Kobelco, Sumitomo, Hyundai and Kato.

More information on these services -

Did you know?

We have a range of industrial oil coolers for various makes and models now available.  Listed below are just a few;

Oil Coolers


Atlas Copco XAS50 Compressor


Atlas Copco XAS85 Compressor


Atlas Copco XRH350 Compressor


CAT 988 Hydraulic Oil Cooler


CAT 992G Hydraulic Oil Cooler


Elphinstone R2900 Hydraulic


Leibherr 944 Excavator Hydraulic


Samsung 280C Oil Cooler


Caterpillar D10 Dozer Transmission


Deutz Cooling Module


Bell B40D Brake Cooler (2 circuit)


Hitachi HD400 Oil Cooler


Universal Oil Cooler


Universal Oil Cooler


Elphinstone Oil Cooler – Suitable for underground applications and heavy duty construction with hemmed fin


We also have a range of universal units available.  Call us on (02)9600 8485 with your requirements.
Core sizes in stock that can be made to your configuration are;

300 x 300
400 x 400
500 x 500
600 x 600
700 x 900
800 x 900
900 x 900

All of these cores are 94 thick.


Atlas Copco L7 / L8 MK2 Charge Air Cooler


Komatsu D475-5


Doosan Moxy MT471 CAC


More information on these services offered by Superior -

Technical Bulletin


Complaint:  The customer complaint is that the A/C was nice and cold, then after approximately 20-30 minutes of driving, the A/C appears to turn off and go hot.

Cause:  It could be that the evaporator coil is icing up.  This, in turn, will then reduce the blower fan air flow through the dash vents giving the impression that the A/C is no longer cold.

The evaporator temperature sensor signals directly to the HCM (HVAC Control Module behind the glove box).  The HCM then applies current to the variable stroke compressor electronic control valve which adjusts the compressor output (stroke). The evaporator temperature sensor plays a pivotal role in the A/C performance as it impacts on what the compressor outputs. If the evaporator temperature sensor is providing incorrect information to the HCM the compressor output will be affected.

Part of the cause could be that the evaporator sensor is located in an incorrect area of the evaporator “air off” side and not fully sensing the cold air being produced. To ensure that the sensor is located in an area that is the coldest part of the evaporator coil, a modification may be required

Frequently Asked Questions

How often does coolant need replacing?
There is no easy way to tell when coolant or corrosion inhibitor needs to be replaced. Don’t be tempted to judge coolant concentration just by it’s colour, as often it will appear to be alright even though the component of the mixture that protects your engine has been used up. It’s best to follow the vehicle manufacturer’s instructions regarding change intervals. Typically this is around every two years or 40,000km, but will vary.

Why is it dangerous to remove a radiator cap when the engine is hot?
It’s extremely dangerous to remove the cap from a hot radiator as the coolant will be under pressure and the temperature will be well above boiling point. You should only check the coolant level when the engine is cold. Don’t forget that if your car has a coolant recovery system the level must be checked in the recovery reservoir as well as in the radiator.

My radiator is leaking, what can I do?
Do not try to use a putty-type product to seal a leak. Bring the radiator to us for an assessment. We will first do a pressure test to see where the leak is and advise you if your radiator is in a reasonable condition to be fixed. This may involve changing either the top or bottom tanks or doing a re-core. This is where we manufacture a core to exactly match your existing one, then use your tanks to re-core your radiator.

What to look out for…

Cooling System Leaks – Loss of coolant because of a leak is probably the most common cause of overheating. Possible leak points include hoses, the radiator, thermostat housing, water pump, head gasket, automatic transmission oil cooler, cylinder heads and the motor itself.

Fan – With mechanical fans, most overheating problems are caused by a faulty fan clutch. Another problem can be a missing or removed fan shroud. This can reduce the fan’s cooling effectiveness by as much as 50 percent. With an electric cooling fan, check to see that the fan cycles on when the engine gets hot and when the air conditioner is on. If it fails to run, the fan motor is bad or the automotive wiring may be faulty, it needs to be checked and or replaced.

Radiator – The most common problems radiators fall prey to are clogging both internal leaks (from the corrosion of the block) and external leaks (bugs and dirt lodged in the fins of the radiator). This can block air flow through the core and reduce the radiator’s ability to dissipate heat. Internal corrosion and an accumulation of deposits can likewise inhibit coolant circulation and reduce cooling.

Does an aluminum radiator cool better than a copper brass radiator?
An aluminum radiator does cool better than a copper brass radiator. For example, an aluminum radiator with 2 rows of 1″ tubes is equivalent to a copper brass radiator with 5 rows of 1/2″ tubes. Aluminum provides high efficiency, is lightweight, and has a longer life compared to copper brass.

Does your hard working vehicle need extra cooling performance?
We can offer heavy duty options such as thicker core radiators and external oil coolers that will control your engine temperature when the going gets tough.

“I have a problem with my radiator”




Download the complete Adfuse Radiator Brochure here

Heavy duty radiator products and services offered by Superior -


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