Subaru Mechanic Pre‑Purchase and Service Inspection Guide

Garage Full Throttle your Local Craigieburn Subaru Mechanics

Whether you’re eyeing a rally‑bred WRX/STI or a reliable naturally aspirated Forester, Outback or Impreza, buying a used Subaru demands expert insight. As specialist Subaru mechanics at Garage Full Throttle in Craigieburn, we’ve distilled years of experience into this checklist to help you make a confident purchase—and keep your boxer‑powered all‑wheel‑drive running at its best.

1. Why Use a Dedicated Subaru Mechanic?

• Boxer‑Engine Expertise: Subaru’s horizontally opposed engines have unique sealing, cooling and oil‑management needs.
• AWD System Knowledge: Our team understands Subaru’s Symmetrical All‑Wheel Drive nuances, such as transfer cases, differentials, and centre diff settings.
• Performance Tuning​: From stock to stage‑2 upgrades, we read boost control systems, intercoolers and ECU tunes with authority.

2. Must‑Have Documentation Before Inspection

1. Service History & Logbook
   • Oil changes every 3,000–5,000 mi for turbo models and 5,000–7,500 mi for NA engines.
   • Timing belt/chain service records (older models typically at ~105,000 mi).
2. Performance & Tuning Records
   • Dyno sheets, ECU‑tuning receipts and installation notes for any turbo, intake or exhaust mods.
3. Vehicle History
   • Clean title confirmation, no salvage status.
   • Recall compliance documentation.
   • Accident and repair reports for chassis integrity.

3. Exterior & Undercarriage Check

• Body Panels & Paint:
  • Even panel gaps and consistent paint finish—look for overspray or colour mismatch.
  • Functional hood scoop and clear windshield washer nozzles.
• Rust & Corrosion:
  • Inspect wheel arches, door sills, rear gate hinges and strut towers.
• Undercarriage:
  • Skid plates (if fitted) for heavy‑use dents.
  • Exhaust condition—rust, leaks or aftermarket welds.
  • Chassis rails for off‑road damage.

4. Engine Bay InspectionTurbocharged WRX/STI

• Oil Leaks: Valve‑cover gasket, oil‑pan gasket and turbo housing seals.
• Head Gasket: Look for coolant or oil seepage at the head/block interface.
• Turbo Health:
  • Shaft play test (with the engine off).
  • Check boost control solenoid connections.
  • Inspect intercooler piping for oil residue or cracks.
• Hoses & Belts: No cracks, swelling or frays.

Naturally Aspirated Models

• Head Gasket: Pre‑2012 2.5 L engines are known for failures—check for seepage.
• Cooling System: Radiator and hoses free from weeps; coolant should be clear.
• Timing Components: Verify belt/chain condition where accessible.

5. Drivetrain & Suspension Review

• Transmission & Clutch (Manual)
  • Smooth gear changes, no grinding in 2nd/3rd (everyday synchro wear).
  • Clutch engagement is consistent, withno slippage or judder.
• Automatic/CVT
  • Smooth shifts without “hunting” or jerking. CVT fluid change record?
• AWD System
  • Centre differential / DCCD modes engage correctly (STI).
  • Transfer‑case and axle noises under load—clicking CV joints or whining diffs.
• Suspension
  • Struts are free of leaks; springs and bushings are intact.
  • Bushings, sway‑bar links, and control arms were checked for cracks or excessive play.
  • Tyre wear even—misalignment shows as feather‑ed edges.

6. Performance Test Drive

• Cold Start & Idle: Prompt start, smooth idle (~600–700 RPM), no excessive smoke.
• Boost Response (Turbo Models): Consistent boost ramp‑up without lag or spikes.
• Acceleration & Handling:
  • Linear throttle response, planted feel through corners, no body‑roll surprises.
  • Steering precise, brakes firm—no pull or shake under braking.
• Braking: Even pad wear, firm pedal, no pulsation or noise.

7. Common Subaru Issues to Watch For

1. WRX/STI
   • Ringland failure (2008–2014 models): oil smoke under load.
   • Rod‑bearing knock at low RPM.
   • Boost‑control solenoid faults causing under‑boost.
2. Naturally Aspirated
   • Head gasket leaks on early 2.5 L engines.
   • CVT transmission failures on 2010–2014 models.
   • Excessive oil consumption in FB‑series engines.

8. Post‑Purchase: Trusted Subaru Servicing

Even a well‑maintained Subaru benefits from regular specialist care:

• Logbook Services: Maintain warranty and resale value.
• Fluid Changes: At manufacturer intervals, oil, coolant, brake and CVT fluids.
• Genuine Parts: We fit OEM Subaru components for reliability.
• Expert Advice: From routine maintenance to performance upgrades, our Craigieburn Subaru mechanics tailor each service to your driving style.

Book Your Pre‑Purchase Inspection Today

Protect your investment with a professional Subaru mechanic inspection at Garage Full Throttle, Craigieburn’s premier Subaru specialist workshop.

📞 Call Sammy on 03 9305 6198

📧 Email – garagefullthrottle@gmail.com

📍 306 Hume Hwy, Craigieburn

Opening Hours

Mon–Fri: 8:30 AM–5:30 PM  |  Sat: 9:00 AM–2:30 PM  |  Sun: Closed

“I wouldn’t trust my WRX to anyone but Sammy—knowledgeable, honest and passionate.”

— Miabella A., satisfied Subaru owner

Ensure your next Subaru purchase is a thrill ride, not a money pit. Book now with your local Craigieburn Subaru mechanic!