Product Overview

Summary: This Engine Overhaul Safe Operating Procedure provides a clear, step‑by‑step framework for safely disassembling, inspecting, repairing and reassembling engines in Australian workplaces. It helps workshops and maintenance teams control high‑risk activities, protect workers from serious injury, and demonstrate robust compliance with WHS obligations during complex mechanical work.

Engine overhauls involve a combination of high‑risk tasks: working with heavy components, hazardous substances, rotating machinery, pressurised systems and precision measuring tools. Without a structured procedure, the likelihood of crush injuries, exposure to fuels and solvents, incorrect assembly, and costly rework increases significantly. This Engine Overhaul Safe Operating Procedure sets out a practical, end‑to‑end method for planning and carrying out overhaul work in a way that keeps people safe and ensures engines are returned to service reliably.

Developed for Australian conditions, this SOP aligns with WHS legislation and industry best practice for mechanical workshops, transport depots, plant hire yards and similar environments. It details how to prepare the work area, isolate and lock out energy sources, manage lifting and support of engines, handle hazardous chemicals, and verify critical tolerances and torque settings. By implementing this procedure, businesses can standardise overhaul quality across teams and sites, reduce unplanned downtime, and maintain a defensible record of safe work practices in the event of audits, inspections or incident investigations.

Key Benefits

• Ensure engine overhaul activities are carried out in line with Australian WHS requirements and recognised industry standards.
• Reduce the risk of serious injuries from lifting, crushing, burns, chemical exposure and entanglement during overhaul work.
• Standardise overhaul quality, torque settings and inspection criteria to minimise rework, breakdowns and warranty claims.
• Streamline training and onboarding for new technicians with a clear, step‑by‑step reference document.
• Demonstrate due diligence to regulators, clients and insurers through documented safe work procedures and records.

Who is this for?

• Workshop Managers
• Heavy Vehicle Mechanics
• Automotive Technicians
• Plant and Equipment Fitters
• Aviation Maintenance Engineers (Engines)
• Fleet Maintenance Supervisors
• WHS Managers and Advisors
• Service Department Team Leaders
• Marine Mechanics
• Rail Maintenance Technicians

Hazards Addressed

• Crush and pinch injuries from lifting, moving and supporting engines and heavy components
• Entanglement in rotating machinery such as engine stands, test rigs and driven accessories
• Burns from hot engines, exhaust components, oils and coolants
• Exposure to hazardous substances including fuels, solvents, degreasers and engine oils
• Fire and explosion risks from flammable liquids and vapours
• Manual handling injuries from awkward postures and lifting cylinder heads, crankshafts and blocks
• Eye injuries from flying particles, pressurised fluids and compressed air cleaning
• Hearing damage from prolonged exposure to noisy workshop environments and engine testing
• Slips, trips and falls due to spills, hoses, tools and components on the workshop floor
• Environmental contamination from improper handling and disposal of waste oils, coolants and filters
• Strains and sprains from incorrect use of lifting equipment, hoists and engine stands
• Electric shock hazards from electrical testing equipment, starters and auxiliary systems

Included Sections

• 1.0 Purpose and Scope
• 2.0 References, Standards and Legislative Requirements
• 3.0 Definitions and Abbreviations
• 4.0 Roles and Responsibilities
• 5.0 Competency, Licensing and Training Requirements
• 6.0 Tools, Equipment and Materials
• 7.0 Personal Protective Equipment (PPE) Requirements
• 8.0 Pre‑Start Safety Checks and Workshop Preparation
• 9.0 Hazard Identification and Risk Controls
• 10.0 Engine Isolation, Lockout and Tagout Procedure
• 11.0 Engine Removal, Lifting and Support Procedures
• 12.0 Disassembly Procedure and Component Organisation
• 13.0 Cleaning, Degreasing and Hazardous Chemical Handling
• 14.0 Inspection, Measurement and Tolerance Verification
• 15.0 Repair, Replacement and Use of Specialist Services
• 16.0 Reassembly Procedure and Torque Specifications
• 17.0 Fluid Filling, Priming and Pre‑Start Checks
• 18.0 Engine Start‑Up, Testing and Run‑In Procedure
• 19.0 Quality Assurance, Documentation and Sign‑Off
• 20.0 Waste Management and Environmental Controls
• 21.0 Emergency Procedures (Fire, Spills, Injury)
• 22.0 Housekeeping and Return to Service
• 23.0 Review, Audit and Continuous Improvement

Legislation & References

• Work Health and Safety Act 2011 (Cth) and equivalent state and territory WHS Acts
• Work Health and Safety Regulations 2011 (Cth) and equivalent state and territory WHS Regulations
• Safe Work Australia – Code of Practice: Managing Risks of Plant in the Workplace
• Safe Work Australia – Code of Practice: Hazardous Manual Tasks
• Safe Work Australia – Code of Practice: Managing Noise and Preventing Hearing Loss at Work
• Safe Work Australia – Code of Practice: Labelling of Workplace Hazardous Chemicals
• AS/NZS 4024 series: Safety of machinery
• AS 2550 series: Cranes, hoists and winches – Safe use (relevant to engine lifting equipment)
• AS/NZS 1715: Selection, use and maintenance of respiratory protective equipment
• AS/NZS 2161 series: Occupational protective gloves
• AS/NZS 2210 series: Occupational protective footwear
• AS/NZS 3000: Electrical installations (Wiring Rules) – for electrical safety around test equipment