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NOTES / 03
Seasonal

Perth summer vs
your car: who wins

Forty-degree days kill batteries, cook coolant and crack tyres: the three checks worth doing before December, and what they cost.

Kyle Burns 4 min read Nov 2026

Every summer the same cars come in on the same tilt trays: boiled batteries, cooked cooling systems, tyres that chose the hottest day of the year to delaminate. All three are cheap to check and expensive to learn about on the side of the Kwinana Freeway.

If you're road-tripping this summer, the pre-trip check below is the version we run on our own cars before long drives.

Car with bonnet up in harsh summer sunlight

Batteries die in heat, not cold

Everyone blames winter, but heat is what ages a battery, and summer just finishes the job. If yours is past three years old, a two-minute load test tells you if it'll see February. Replacement with test and fitment runs from $239.

Coolant isn't set-and-forget

Coolant additives deplete over about two years, then the system corrodes from the inside. A summer coolant flush ($149) is cheap insurance against the classic 'steam on the freeway' call. While we're in there we check hoses, cap and thermostat: the parts that actually cause roadside overheats.

Tyres: age matters as much as tread

Rubber perishes. A tyre can have perfect tread and still be dangerous past six or seven years. Check the DOT date on the sidewall. And no, the spare doesn't count if it's the original 2012 donut under the boot floor.

The ten-minute pre-trip check

  • Battery load test: free with any service
  • Coolant level, colour and hoses
  • Tyre pressures including the spare, plus age check
  • Air conditioning: a regas with leak check beats discovering it at Kalgoorlie
  • Wipers and washer bottle (dust storms need both)
  • Oil level and condition

Bring it in and we'll run the list on the hoist. It's the same 40-point check included in a minor service.

Battery load tester showing a healthy reading
Tyre sidewall DOT date code close-up
Kyle's rule: Check tyre pressures cold, before the drive. A 40-degree day can add 6 to 8 psi by itself. Set them to the placard on the driver's door jamb, not the number on the tyre wall.
Coolant being drained during a summer cooling system service
Before you ring

Summer quick answers

Not sure which checks your car actually needs before the trip? List your rego and travel dates on the contact page and we'll sort the rest.

Summer checklist on a clipboard over an open bonnet

Find the DOT code on the sidewall. The last four digits are week and year. '2419' means week 24 of 2019. Over six years old and heat makes it a gamble regardless of tread.

Yes, it's the 40-point check, free with any service or $85 standalone. Takes about forty minutes and covers exactly the stuff that strands people in summer.
Enough reading

Heading somewhere hot?

Book the pre-trip check before the December rush. It's free with any service. Send it through the contact page and we'll come back with a written quote before any work starts.

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