Common faults below

BYD Engine Carbon Cleaning

What we see most on BYD engines, what causes it, and which clean fixes it. Every job starts with a scan and a quote at our Kings Park workshop.

BYD engine carbon cleaning at Expert Carbon Cleaning, Kings Park Sydney
  • Free scanbefore any work
  • Kings ParkSydney workshop
  • 20+ yrsMTA certified
  • 4.9on Google

Which BYD do you have?

BYD sells two very different kinds of car in Australia, and only one of them can carbon up.

The Atto 1, Atto 2, Atto 3, Dolphin, Seal and Sealion 7 are battery-electric. There is no combustion engine, no intake, no EGR valve and no exhaust filter. If you drive one of these, you do not need carbon cleaning and we will tell you that on the phone rather than book you in.

The Shark 6, Sealion 5, Sealion 6, Sealion 8, Seal 6, Seal 6 Touring and Atto 2 DM-i are plug-in hybrids. They run a 1.5-litre petrol engine — a 2.0-litre turbo in the Shark 6 Performance — alongside the electric drive. Those engines do everything a petrol engine normally does, including recirculating exhaust gas, and they do it in a duty cycle that is unusually hard on the intake side.

Common BYD carbon problems

What we see

If you drive a petrol BYD

If you drive a diesel BYD

If you drive a hybrid BYD

Hybrid

EGR and Intake Deposits on the DM-i Petrol Engine

  • BYD’s 1.5-litre Xiaoyun engine runs an Atkinson cycle at a very high 15.5:1 compression ratio and uses exhaust gas recirculation as part of how it reaches its efficiency figures.
  • Recirculated exhaust carries soot back into the intake, where it meets crankcase oil vapour and hardens.
  • Rough or uneven running when the petrol engine cuts in.
  • Engine warning light with EGR flow or efficiency codes.
  • Petrol consumption creeping up on longer trips where the engine does more of the work.
  • The valve and intake parts come off and are cleaned by hand — hardened soot does not respond to chemicals alone.
  • We scan first and show you what the codes actually say before quoting anything.

Fixed by

EGR & Intake Manifold Cleaning

Quoted after the free scan

See the service →
Hybrid

Deposits From Short, Low-Load Engine Running

  • A plug-in hybrid engine starts and stops rather than running continuously, and much of its work happens at low load while the battery covers the rest.
  • An engine that rarely reaches and holds operating temperature leaves unburnt fuel and soot behind on each cycle.
  • Petrol that sits for long periods between engine runs gives deposits time to form in the fuel system.
  • Noticeable roughness in the first minute after the engine starts.
  • Hesitation or a slight stumble when the engine engages after a long stretch on battery.
  • Loss of smoothness on longer drives once the battery is depleted.
  • A hydrogen carbon clean takes about an hour with no disassembly and clears deposits from the combustion chamber, intake and exhaust side.
  • Worth doing as maintenance rather than waiting for a warning light.

Fixed by

Hydrogen Carbon Clean

$275

See the service →

Applies to any BYD

Keeping your BYD clean

Prevention

BYD is a newer brand on Australian roads, and the plug-in hybrids in particular have a duty cycle we are only starting to see come through the workshop at higher kilometres. What we can say with confidence is that the petrol engine in a DM-i car is a conventional combustion engine with an EGR system, and the pattern of short, intermittent, low-load running is the pattern that fills an intake with carbon.

If your Shark 6, Sealion 6 or Seal 6 has a warning light or has lost its smoothness, book a time at our Kings Park workshop. We scan it free first, tell you what it needs, and quote before starting. If it turns out to be nothing we can help with, we will say so.

Took my car in for service and carbon cleaning. Work was precise, price was reasonable. Very happy with the service.”

Farzin Misaghi · Google review

Before any engine work on your BYD, search your VIN on the government vehicle recalls site. Recall repairs are free, so check there first.

  • Let the engine run properly now and then. If you almost always drive on battery, an occasional longer trip that gets the engine to full temperature does more good than any additive.
  • Do not ignore the first warning light. On these engines the EGR circuit is likely to be the first thing to load up, and it is far cheaper to clean than to leave.
  • Keep the servicing up. Oil condition feeds directly into how much vapour reaches the intake.
  • If you drive a BYD EV, none of this applies to you. There is nothing in an Atto 3, Dolphin, Seal or Sealion 7 for us to clean.

Book your BYD in

Get a free quote

Tell us the model, the kilometres and what it is doing. We will scan it and tell you which clean it needs, and what it costs, before any work starts.

Get a Free QuoteCall Nas — 0455 455 644

Tell Nas about your car

What are you driving, and what is it doing? Nas will call you back to talk it through — we scan the car at the workshop first, and nothing starts without your OK.

Get a Free QuoteCall Nas