Radiator and Cooling System Diagnostics & Replacement Hamilton

Why is Radiator / Cooling System Health Important?

The cooling system is responsible for keeping your car’s engine running at an optimal temperature. This reduces the risk of overheating and permanent engine damage. Ensuring the cooling system is working correctly will keep your car running healthily. It will also prevent you from needing to pay an expensive engine repair/replacement bill.

Your cooling system consists of a number of core parts including:

  • Engine radiator
  • Radiator cap
  • Coolant (water) and antifreeze
  • Coolant temperature sensors
  • Frost plugs
  • Rubber hoses
  • Heater assembly
  • Engine thermostat
  • Water pump
  • Drive belts

Deterioration or damage to anyone of these critical parts and systems could cause your engine to underperform, causing excessive fuel consumption and emissions. It could also cause damage to key exhaust components such as the expensive catalytic converter and worse of all could destroy your engine through overheating.

How to check your cooling system


Signs of Radiator and Cooling System Problems:

  • Overheating: One of the most obvious signs is the engine temperature gauge consistently showing higher-than-normal temperatures or a warning light indicating overheating.
  • Coolant Leaks: Puddles or spots of bright-colored coolant (usually green or orange) under the vehicle after it has been parked can indicate a coolant leak. Check for leaks around the radiator, hoses, and connections.
  • Low Coolant Level: If you frequently find yourself needing to top up the coolant in the reservoir, it may indicate a leak or evaporation due to a faulty radiator cap.
  • Discolored Coolant: Healthy coolant is typically bright in color. If you notice a change in color, such as brown or rusty coolant, it may suggest contamination or corrosion within the cooling system.
  • Steam or Smoke: Steam rising from the engine compartment is a clear sign of overheating. If you see smoke, it could indicate a coolant leak onto hot engine components.

We Offer Cooling System & Radiator Services in Hamilton.

Grimmer Motors provides efficient, reliable cooling system fixes to get your car running healthily again. Some of the main reasons for cooling system damage include:

  • Leaking in the radiator.
  • Damaged or worn hoses.
  • Stale coolant (in need of replacement).
  • A damaged radiator cap.
  • The car’s thermostat not working properly.

Regardless of the problem, our team of experienced mechanics can organise for the repair of your vehicle. We can fix leaks, get your car’s temperature back to normal, perform a cooling system flush and rid the vehicle of any dashboard warnings.

We can Quickly Diagnose Radiator and Cooling System Problems.

Grimmer Motors use the latest state of the art electronic tools and infrared measuring technology to diagnose any cooling system or radiator related faults. As a result of this, you will be able to take action before these faults cause more damage to your car. You can trust our experienced, qualified and skilled mechanics will get the diagnosis and fix right the first time.

Grimmer Motors offers FREE diagnostic testing (worth $90) on all services over $49. You can find out more about our diagnostic services here.

Conveniently located in Fairfield, Grimmer Motors have been providing quality service to Hamilton since the company was established in 1934. When you receive cooling system servicing, flushing or replacement through Grimmer Motors, you can trust our fully qualified mechanics to safely and efficiently service your vehicle, advising you before further work is conducted.


Live/work in any of the following areas? Grimmer Motors could be extra convenient for you.Fairfield

  • Fairview Downs
  • Enderly
  • Claudelands
  • Peachgrove
  • Hamilton East
  • Chartwell
  • Chedworth
  • Central Hamilton
  • Forest Lake, Beerescourt
  • Frankton
  • Melville
  • Waikato



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Grimmer Motors Ltd


Paul Johns

Booked the ol' Fuga in for a service this week. I dropped it off early to take advantage of the free clean and asked if I could have it ready at 3 pm. The service went well and they... pointed out things that would need attention in the future. I like the introduction of the vehicle service and repair log book. Which has all my previous services and fix ups recorded in it. And the Fuga was freshly cleaned and ready at 3pm, like they said. Thanks Team

Cinn Thornton

The team at Grimmer Motors are very friendly and have awesome customer service. My car needed scan as flashing light on dash. The problem was identified , easy to ... understand explanation given and quote for fix provided. Thanks team.

Pip Six

Awesome service. They communicated really well with me about what was going on and then fixed a few extras on the same day I took my van in. A great place.

Lincoln Fernandes

Fast easy reliable and much cheaper compared to dealerships

Hamish O'neill

Great customer service, good communication and works done on time. Thanks Grimmers

Sarah Bowers

Love leaving our car(s) in the friendly and capable hands at Grimmer Motors. Everything from drop off, reception, communication and the work done is of a high standard... and much apprecaited. Another happy customer - thanks Grimmers.