Apex Performance Tuning Melbourne — European and performance car workshop
Apex Performance Tuning
Porsche 911 in the Apex Wantirna South workshop for direct-injection carbon cleaning
Porsche Carbon Clean & Walnut Blasting · Melbourne

Porsche carbon clean & walnut blasting Melbourne.
Intake valves back to clean metal.

Apex Performance Tuning is an independent European vehicle specialist workshop in Wantirna South. We are not a manufacturer and not an authorised dealership.

Porsche direct-injection engines never wash fuel over the intake valves, so carbon builds up as a hard crust — rough cold start, throttle hesitation, misfire codes and fuel economy that quietly slides. We remove the manifold, seal each port, blast with walnut shell media under vacuum extraction, inspect the crankcase ventilation system, and verify the result on Porsche PIWIS. 9A1 and MA1 DFI flat-six, 9A2 turbo flat-six, 718 flat-four, Macan and Cayenne direct-injection engines all handled in Wantirna South.

Call the Apex workshop — 0483 939 216

For service, repair and diagnostic enquiries at Apex, Wantirna South.

★ 4.9-star Google ratingManufacturer warranty preservedOEM on request
Quick answer

Apex Performance Tuning carries out Porsche walnut-shell blasting and intake carbon cleaning at Unit 4/6 Woodbine Court, Wantirna South VIC 3152. We are an independent specialist workshop, not a dealership.

The intake manifold is removed, each port is individually sealed and blasted with walnut shell media under continuous vacuum extraction, the PCV and oil separator are inspected, and the engine is reassembled on new OEM gaskets to factory torque and verified on Porsche PIWIS.

Most four-cylinder and inline-six engines are a full day; V8s and harder-access engines can run a day and a half. Every job is quoted in writing against your VIN before work begins. Monday to Friday 8:30am–5:30pm — 0483 939 216.

4.9★
Google rating
Warranty
Manufacturer schedule preserved
Photo & video
Inspection evidence
Approval first
No extra work without your OK
What we do

Every service, every job —
done properly.

Manufacturer-spec intervals, dealer-level diagnostics and OEM-grade parts. Every service is quoted in writing against your VIN before work begins, with a clear, line-itemised breakdown.

  • 01

    Borescope inspection first

    We borescope the intake ports before anything comes apart, so you can see the actual carbon load on your Porsche and whether the job is warranted yet.

  • 02

    Manifold off, ports sealed

    Intake manifold removed, each port individually sealed, injectors, coils and manifold flaps inspected while access is open.

  • 03

    Walnut shell blasting under vacuum

    Crushed walnut shell is abrasive to carbon but safe on aluminium heads and valve faces, with continuous vacuum extraction so nothing reaches a cylinder.

  • 04

    Ports verified after blasting

    Re-inspected to confirm the valve faces and seats are back to clean metal — photographed so you can see it.

  • 05

    PCV & oil separator inspection

    The usual root cause of rapid carbon return. Inspected and quoted while apart so the deposits do not simply come straight back.

  • 06

    Verified on Porsche PIWIS

    Cold-start behaviour, fuel trims, idle quality and misfire counters checked in live data on Porsche PIWIS, then road tested before it goes home.

Why Apex

Dealer-grade work.
Without the dealer wait-list.

  • 01

    Porsche intake work weekly

    9A1 and MA1 DFI flat-six, 9A2 turbo flat-six, 718 flat-four, Macan and Cayenne direct-injection engines — correct media, correct procedure, correct torque specifications.

  • 02

    Evidence before and after

    Borescope images before, port photos after. You see exactly what the job achieved.

  • 03

    No chemical-soak shortcuts

    Spray-in cleaners cannot remove hard baked deposits from intake valves. Media blasting is the only method that genuinely cleans them.

  • 04

    Root cause addressed

    Crankcase ventilation, turbo seals and injector condition checked, because those determine how fast the carbon returns.

  • 05

    Independent, quoted in writing

    Dealer-level tooling and procedure with a written, line-itemised quote against your VIN before any work starts.

  • 06

    Independent, not dealer

    The same tooling and the same standard of work, with everything approved in writing first.

  • 07

    Photos & written quotes

    Every finding photographed on the hoist. Extras approved in writing before we touch anything.

Deep dive

Porsche engines we carbon clean

These are the Porsche direct-injection families we handle most often in Melbourne's east. Access and procedure differ between them, so every car is borescoped and quoted individually rather than priced off a generic list.

  • 9A1 / MA1 DFI flat-six

    997.2, 991.1, Boxster 987.2 and 981, Cayman. Deposits build quietly on these engines and are usually found on a scan or inspection rather than felt.

  • 9A2 turbo flat-six

    991.2 and 992 Carrera and Turbo. Manifold-off access, ports individually sealed and blasted.

  • 718 turbo flat-four

    718 Boxster and Cayman. Direct injection with the same intake-deposit behaviour.

  • Macan direct injection

    Macan, Macan S, GTS and Turbo. Access varies by engine, so each car is borescoped and quoted individually.

  • Cayenne V6 and V8 DI

    Including S and Turbo variants. Longer bookings with the intake assembly removed.

  • Combined maintenance

    Plugs, coils and intake gaskets are best replaced while access is open rather than paying for the same strip-down twice.

The symptoms owners actually notice

Carbon buildup creeps rather than fails. Owners typically describe a lumpy first 20–30 seconds after a cold start, a soft hesitation off idle in traffic, fuel economy that has quietly slipped over years, and occasional cylinder-specific misfire codes that come and go with weather and fuel.

On turbocharged engines the last third of the rev range goes flat, because restricted intake ports cost airflow exactly where you notice it. None of that is proof on its own, which is why we scan and borescope before recommending the job.

Booking a carbon clean from across Melbourne's east

We are in Wantirna South, minutes from EastLink and the M1, which makes us a straightforward drop-off for owners across Knox, Ringwood, Glen Waverley, Wheelers Hill, Box Hill, Camberwell, Doncaster, Blackburn and the wider eastern and south-eastern suburbs.

Send us your rego or VIN and current symptoms and we will confirm the correct procedure for your engine, then quote it in writing before anything is booked. Vehicle pickup and drop-off may be available by prior arrangement, subject to location and availability.

Questions

Common questions,
straight answers.

Do Porsche DFI engines really need carbon cleaning?+

Yes. Direct injection means fuel no longer washes the intake valves, so deposits build regardless of marque. On Porsche the car often still drives well, which is why it is usually found by borescope inspection.

Is walnut blasting safe on a Porsche head?+

Yes, when done correctly. Walnut shell breaks carbon but is soft enough not to damage aluminium or the valve faces, and each port is sealed with continuous vacuum extraction so nothing enters a cylinder.

How long does it take?+

Most four-cylinder and inline-six engines are a single day in the workshop. V8s and harder-access engines run a day and a half. Drop off in the morning and we will confirm timing when we book it.

Will it affect my warranty?+

No. It is a maintenance procedure carried out to manufacturer specification with OEM gaskets and documented with photos, an inspection sheet and an itemised invoice, so your statutory rights stay intact.

Should plugs and coils be done at the same time?+

If they are anywhere near due, yes. The engine is already open to that level, so combining the work avoids paying for the same access twice.

Where are you located?+

Wantirna South, VIC 3152. Easy from EastLink, M1 and Melbourne's east. Call 0483 939 216 to book.

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Book in

Ready for a proper quote?

Send your registration or VIN, current kilometres and what the car needs. We come back with the scope in writing — usually within the business day — and nothing extra is carried out without your approval.

Call the Apex workshop — 0483 939 216