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CORROSION PREVENTION AND SEALING SEALING 77-4-9 Inspections during maintenance servicing Service Job Sheets include the following operations to check bodywork for corrosion: l With the vehicle on a lift, carry out visual check of underbody sealer for damage. l With the vehicle lowered, inspect exterior paintwork for damage and body panels for corrosion. The vehicle must be washed and free from deposits prior to inspection. It is part of the owner's responsibility to ensure The checks described above are intended to be visual only. It is not intended that the operator should remove trim With the vehicle on a lift, and using an inspection or spot lamp, visually check for the following: l Corrosion damage and damaged paintwork, condition of underbody sealer on front and rear lower panels, sills l Damage to underbody sealer. Corrosion in areas adjacent to suspension mountings and fuel tank fixings. The presence of small blisters in underbody sealer is acceptable, providing they do not expose bare metal. Pay special attention to signs of damage caused to panels or corrosion protection material by incorrect jack caut : It is essential to follow the correct jacking and lifting procedures. With the vehicle lowered, visually check for evidence of damage and corrosion on all visible painted areas, in l Front edge of bonnet. l Visible flanges in engine compartment. l Lower body and door panels. Rectify any bodywork damage or evidence of corrosion found during inspection as soon as is practicable, both to Where corrosion has become evident and is emanating from beneath a removable component (e.g. trim panel, Underbody protection repairs Remove corrosion protection from the damaged area before straightening or panel beating. This applies in particular warn : DO NOT use oxy-acetylene gas equipment to remove corrosion prevention materials. Large volumes of fumes Equipment for the removal of tough anti-corrosion sealers offers varying degrees of speed and effectiveness. The The most common method of removal is by means of a hot air blower with integral scraper. High temperatures can be generated with this equipment which may cause fumes. Take care during its use. Another tool, and one of the most efficient methods, is the rapid-cutting 'hot knife'. This tool uses a wide blade and is |