Intake valve carbon clean (walnut blast, direct injection): how much does it cost?
Typically NZ$530–NZ$1,190 in New Zealand and A$560–A$1,240 in Australia, including GST. European cars.
| Parts (trade) | Labour | Sublet | Total incl GST | |
|---|---|---|---|---|
| New Zealand | NZ$80–NZ$250 | 3–6 h | — | NZ$530–NZ$1,190 |
| Australia | A$70–A$230 | 3–6 h | — | A$560–A$1,240 |
What affects the price
Intake manifold off, ports blasted, new gaskets. Auckland specialists quote about NZ$650-900 + GST total. V6/V8 or very heavy carbon takes longer.
Other engine cooling repairs
- Head gasket replacement (4-cylinder)NZ$1,830–NZ$4,090
- Head gasket replacement (V6 / flat-4 / twin-head engine)NZ$3,860–NZ$7,330
- Head gasket replacement (diesel ute, 4-cylinder)NZ$3,300–NZ$6,340
- Water pump replacement (belt-driven, not behind timing cover)NZ$340–NZ$770
- Water pump with timing belt kit (timing-belt-driven pump)NZ$770–NZ$1,970
- Water pump inside timing cover (chain engine)NZ$980–NZ$2,100
- Radiator replacement (Japanese car / small SUV)NZ$470–NZ$960
- Radiator replacement (ute / 4WD / European)NZ$780–NZ$1,850
- Thermostat and housing replacementNZ$200–NZ$780
- Radiator cooling fan motor or fan assemblyNZ$350–NZ$1,280
Researched by Credov in October 2026 from NZ and Australian parts suppliers and workshop price guides. Typical ranges, not quotes: ask a workshop for a quote before you rely on a price. All repair costs.