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Describe the job once and we'll match it with up to 3 diesel mechanics in Seaham.

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Diesel Mechanics in Seaham NSW

14 diesel mechanics1 based here · 13 serve the area★ 4.9 average from 38 reviews

About these results

Based here first, then diesel mechanics by rating, then related trades.

A business is Featured only when it holds our Featured plan; Featured is a listing plan, not a rating.

14 diesel mechanics based in or serving Seaham; listings updated 7 Oct 2026.

  1. Pacific Truck Repairs

    Mechanics, Diesel Mechanics

    Seaham NSW 2324

    View profile Est. 2016

    Mobile truck and trailer repairer based in Seaham, NSW, servicing Newcastle and the Hunter Valley.

    • Mobile truck mechanics
    • Mobile diesel mechanics
    • Truck repairs

    Seaham NSW 2324

    Open now · 24 hours

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  2. Based nearby, serving Seaham

    These businesses aren't based in Seaham but list it as a service area.

  3. North Coast Heavy Diesel

    Mechanics, Diesel Mechanics, Auto Electricians, 4x4, Tyres

    Based in Thrumster NSW · serves Seaham

    5.0 (12 reviews) View profile Credentials listed Serves this area Est. 2025

    Mobile diesel mechanic in Thrumster, NSW servicing heavy vehicles, plant machinery and light vehicles, with auto electrical repairs and tyre work.

    • Heavy Vehicle Servicing
    • Heavy Vehicle Repairs
    • Auto Electrical Repairs

    Based in Thrumster NSWServes Seaham

    Open now · 24 hours

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  4. Heavy Diesel Specialists

    Diesel Mechanics, Mechanics, Auto Electricians

    Based in Rutherford NSW · serves Seaham

    4.0 (1 reviews) Directions View profile Credentials listed Serves this area Est. 2013

    Diesel mechanics in Rutherford, NSW for truck and trailer repairs, hydraulic diagnostics and diesel engine work.

    • Truck & trailer repairs
    • Hydraulic diagnostics & repairs
    • Diesel engine diagnostics & repairs

    Based in Rutherford NSWServes Seaham

    Open now · 24 hours

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  5. Coretuned

    Diesel Mechanics, 4x4

    Based in Thornton NSW · serves Seaham

    Directions View profile Serves this area Est. 2022

    Performance workshop in Thornton, NSW for custom dyno tuning, diesel tuning, turbocharging and supercharging.

    • Custom Dyno Tuning of EFI systems
    • Turbocharging
    • Diesel Tuning

    Based in Thornton NSWServes Seaham

    Closed · opens 8:00 am

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  8. Adam's Auto Fix

    Mechanics, Auto Electricians, 4x4, Tyres, Diesel Mechanics

    Based in Medowie NSW · serves Seaham

    5.0 (11 reviews) Directions View profile Credentials listed Serves this area Est. 2005

    Mechanic in Medowie, NSW for logbook servicing, brake repairs, roadworthy inspections and tyre work.

    • Log Book Servicing
    • Brake Repairs
    • Roadworthy Inspections

    Based in Medowie NSWServes Seaham

    Closed · opens 8:00 am

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  9. Motto Farm Auto Repairs

    Mechanics, Auto Electricians, Diesel Mechanics

    Based in Heatherbrae NSW · serves Seaham

    4.9 (7 reviews) Directions View profile Serves this area Est. 2007

    Mechanic in Heatherbrae, NSW for general servicing, rego checks, mechanical repairs and auto air-conditioning.

    • General servicing
    • Rego checks
    • Auto air-conditioning

    Based in Heatherbrae NSWServes Seaham

    Closed · opens 8:00 am

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  10. Bartlett Automotive

    Mechanics, Auto Electricians, 4x4, Diesel Mechanics

    Based in Raymond Terrace NSW · serves Seaham

    5.0 (3 reviews) Directions View profile Credentials listed Serves this area Est. 2013

    Mechanic in Raymond Terrace, NSW for logbook servicing, brake and clutch repairs, and steering and suspension work.

    • Logbook Servicing
    • Brake & Clutch Repairs
    • Steering & Suspension Repairs

    Based in Raymond Terrace NSWServes Seaham

    Closed · opens 7:30 am

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  11. Johnston Plant & Heavy Vehicle Repairs

    Mechanics, Diesel Mechanics

    Based in Medowie NSW · serves Seaham

    5.0 (2 reviews) View profile Serves this area Est. 2018

    Mobile diesel mechanic in Medowie, NSW, servicing plant and heavy vehicles on site across the Port Stephens and Hunter areas.

    • Mobile Diesel Mechanic Servicing
    • Mobile mechanic
    • Diesel servicing and repairs

    Based in Medowie NSWServes Seaham

    Closed · opens 6:00 am

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  12. AutoCool Air Conditioning and Mechanical

    Auto Electricians, Mechanics, Tyres, Diesel Mechanics

    Based in Raymond Terrace NSW · serves Seaham

    4.0 (2 reviews) Directions View profile Credentials listed Serves this area Est. 1991

    Auto air conditioning and mechanical workshop in Raymond Terrace, NSW, handling aircon repairs and regassing, radiators, exhausts and diagnostics.

    • Sales, repairs, service & installation o…
    • Air conditioning re-gassing
    • Mechanical/electrical diagnostics

    Based in Raymond Terrace NSWServes Seaham

    Closed · opens 7:00 am

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  13. Hunter High Performance

    Mechanics, 4x4, Diesel Mechanics

    Based in Brookfield NSW · serves Seaham

    Directions View profile Serves this area Est. 2020

    Diesel tuning and performance specialist in Brookfield, NSW, for dyno tuning, ECU remapping and 4WD upgrades.

    • Diesel Performance Upgrades
    • Turbo Fitment
    • Dyno Tuning

    Based in Brookfield NSWServes Seaham

    Closed · opens 8:00 am

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  14. Port Stephens Diesel Services

    Mechanics, Diesel Mechanics

    Based in Medowie NSW · serves Seaham

    View profile Credentials listed Serves this area Est. 2022

    Mobile diesel mechanic in Medowie, NSW for breakdowns, planned maintenance and logbook servicing.

    • Mobile Diesel Mechanic
    • Planned Maintenance
    • Log Book Servicing

    Based in Medowie NSWServes Seaham

    Open now · 24 hours

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  15. Quiptech Group Pty Ltd

    Mechanics, Diesel Mechanics

    Based in Heatherbrae NSW · serves Seaham

    Directions View profile Serves this area

    Truck body builder in Heatherbrae, NSW, making tipper and tray bodies, doing chassis work, repairs and custom modifications.

    • Oil change
    • Truck and bus repairs

    Based in Heatherbrae NSWServes Seaham

    Closed · opens 7:30 am

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Choosing diesel mechanics in Seaham

Diesel mechanics for diesel servicing and repairs, injectors and fuel systems, DPF cleaning and truck repairs. Mechanics Directory lists 14 diesel mechanics in Seaham NSW. Listings show the services each business offers, and a rating where there is one.

What to check before you book

Getting started

  1. Describe the job. Your vehicle's make, model and year, what's wrong or what it needs, and when you need it done.
  2. Shortlist two or three. Use the filters above to narrow this page by rating, listed credentials and website.
  3. Compare quotes. Or send one request and we'll match it with up to 3 diesel mechanics.
  4. Agree in writing. Confirm the price, what's included and when the vehicle will be ready before work begins.

Frequently asked questions

How do I choose between diesel mechanics in Seaham?

Compare two or three. Ask whether they work on your make, and on light vehicles, trucks or machinery, whether they can come to you, and for a written quote for parts and labour. A business that is owner verified on Mechanics Directory has confirmed it runs the listing.

How much does a diesel service cost in Seaham?

It depends on the vehicle or machine, the oil and filters it takes, and whether the injectors, turbo or DPF need work. Asking two or three local diesel mechanics for a written quote is the quickest way to see the going rate in Seaham.

Do diesel mechanics need to be licensed?

Licensing depends on the work and the state. Modifications such as GVM upgrades need certifying under your state's rules, and outside Western Australia and the Northern Territory, modifications to heavy vehicles over 4.5 tonnes are regulated by the National Heavy Vehicle Regulator. In New South Wales, a business that repairs vehicles needs a motor vehicle repairer licence from NSW Fair Trading, and the people doing the work generally need a tradesperson certificate (some minor work is exempt). You can check a licence on the NSW Government's online licence check. In New South Wales, autogas (LPG) work is regulated under the Gas and Electricity (Consumer Safety) Regulation 2018; ask for the autogas licence. Listings marked "Credentials listed" show a licence, accreditation or membership on the business's profile. We don't check it, so confirm it with whoever issued it.

What is DPF cleaning?

A diesel particulate filter (DPF) traps soot from the exhaust and burns it off on longer runs at highway speed. Lots of short trips can stop that happening, so the filter blocks and a warning light comes on. A diesel mechanic can check the filter and clean it or run a forced regeneration.

What does "serves this area" mean?

Some businesses are based in a nearby suburb but cover this area, including mobile mechanics and towing services that come to you. On suburb pages we list businesses based in the suburb first, then the ones that say they serve it.

How do free quotes work?

Tell us about the job once. We match your request with up to 3 diesel mechanics near you. A business on a paid plan here gets it with your name and contact details and can contact you directly. A business on the free plan sees the job and your suburb but not your details, so it can't contact you unless it upgrades. A business that hasn't claimed its listing sees your request only once it claims. After you send, we tell you which applies to each business. It's free and there's no obligation.