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JustFix Automotive — Repair & Service

Service

Diesel Engine & 4WD Service

Specialist diesel mechanics for utes, 4WDs and SUVs.

Diesel Engine & 4WD Service in Sunshine North

POA

Comprehensive Diesel & 4WD Servicing in Sunshine North

JustFix Automotive is an independent, family-owned workshop in Sunshine North dedicated to keeping your workhorse or weekend off-roader running at its peak. We proudly maintain a perfect 5.0-star Google rating because we treat every vehicle like our own, offering expert care without the dealership price tag.

Why Trust Matters for Complex Engine Repairs

Modern engines are incredibly expensive to fix if they are misdiagnosed. A dirt-cheap service quote often means a mechanic is cutting corners on vital oil grades or skipping crucial carbon cleanouts.

At JustFix Automotive, we operate on complete transparency. As a proud VACC member workshop, we adhere to a strict, customer-first code of conduct. We provide fully transparent, written quotes before any work begins, ensuring you never face hidden fees. When we find an issue, we explain it to you in simple, plain English.

Dealership-Level Diagnostic Technology

Modern common-rail diesels, 4WDs, and direct-injection engines are highly computerized. We invest heavily in the latest technology to pinpoint exact faults without the expensive guesswork.

  • Advanced Scan Tools: We utilize industry-leading diagnostic computers from Bosch, Topdon, Launch, and Thinkcar to communicate directly with your vehicle's engine modules.

  • Precision Diagnostics: We deploy advanced oscilloscopes and thermal imaging cameras to physically trace electrical faults and overheating components that basic code readers miss completely.

  • Specialized Diesel Equipment: We have the specific tools required for safe DPF (Diesel Particulate Filter) cleaning, forced regenerations, and EGR system maintenance.

Our Core Diesel & Engine Services

  • Logbook Servicing: We protect your new-car statutory warranty by using strictly approved OEM-equivalent parts and premium-rated oils.

  • Walnut Intake Valve Cleaning: Modern direct-injection engines suffer from severe carbon build-up on the intake valves, choking airflow. We use specialized walnut shell blasting equipment to safely strip away hardened carbon, instantly restoring lost power, smoothing out rough idles, and drastically improving fuel economy.

  • DPF Diagnosis & Cleaning: We clear heavily blocked Diesel Particulate Filters to restore engine power and save you from a $3,000+ replacement filter.

  • EGR System Cleaning: We safely remove the thick carbon soot build-up that chokes engines and causes excessive fuel consumption.

  • Complete 4WD Maintenance: From heavy-duty brake repairs and suspension checks to cooling system overhauls designed for towing and touring.

Book Your Vehicle In Today

We are the trusted local engine experts for drivers across Sunshine North, Sunshine, Albion, Braybrook, and St Albans.

What’s included

  • Diesel logbook and major servicing
  • Injector, turbo and DPF diagnostics
  • 4WD driveline and suspension checks
  • Pre-trip inspections for touring
Frequently asked

Diesel Engine & 4WD Service — common questions

I keep hearing about "walnut blasting"—what is it, and does my car actually need it?

If you drive a modern direct-injection or diesel engine, thick, sticky carbon naturally builds up on the intake valves over time. It chokes the engine, causing rough idling, misfires, and poor acceleration. We use highly pressurized, crushed walnut shells to literally blast this carbon away. The walnut shells are aggressive enough to obliterate the carbon but soft enough that they cannot damage the engine's metal. It allows your engine to breathe properly again.

Why is there a warning light on my dash that looks like a little exhaust pipe?

That is your DPF (Diesel Particulate Filter) warning light. It means the filter in your exhaust that catches soot is getting completely choked up. Do not ignore this! If you keep driving, the engine will eventually go into "limp mode." Bring it in so we can run a forced regeneration with our scan tools to clear it out safely.

My 4WD feels super sluggish and blows dark smoke when I accelerate, what is broken?

Black smoke and a lack of power usually mean your engine is being starved of air or given too much fuel. This is typically caused by a soot-choked EGR valve, a split turbo hose, or a failing fuel injector. We will hook up our diagnostic tools and thermal cameras to find the exact bottleneck before any parts are replaced.

Will taking my brand-new Ranger or Hilux to you void my factory warranty?

Absolutely not. As a licensed workshop, we are legally authorized to perform your scheduled logbook services. We strictly use approved parts and the exact fluids your manufacturer demands, meaning your warranty stays 100% valid.

12 Months / 20,000 km Warranty

Every repair is backed in writing. You don’t pay upfront — settle your bill only once you’ve reviewed the completed work and you’re happy.

Book a Service

Opening Hours

Booking recommended — walk-ins welcome where possible.

Monday – Friday8:00 am – 5:30 pm
Saturday & Public Holidays9:00 am – 3:30 pm
Xmas, Boxing & Good FridayClosed
info@justfixautomotive.com.auBook Your Service Today
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