Metric Automotive Engineering has announced the availability of the latest metal deposition technology for repairing water jackets on engine blocks. Using a pre-machining process with metal deposition, the process extends the life of the components.

The worst degradation on engine blocks occurs at the block face where it meets the cylinder head. This can be due to coolant contamination or a lack of corrosion inhibitors. Traditionally, damage to the sealing surface is repaired by milling away the affected material, but the more material that is machined off, the shorter the lifespan of the engine block.

Andrew Yorke, Operations Director at Metric Automotive Engineering, says that the advantage of metal deposition versus welding is that there is no heat. “You are talking about a 45°C degree work-surface temperature versus a weld can that go up to 600°C to 700°C. As a result, there is no heat stress or distortion, resulting in a chemical bond that resists corrosion even better than the virgin block material,” he says.

The material used for the metal deposition can vary, depending on the application. A water jacket repaired in this fashion will outperform one that has been repaired traditionally, Yorke says. “The long term benefits are that your water jacket is now sealing on material that is designed to be exposed to poor coolant, and having a lot more deck height on the engine block prolongs the service life.”

He adds that metal deposition is particularly suited for mining customers, who often operate in harsh and remote environments where water and fuel contamination is a common problem.

Metric Automotive Engineering refurbishes large diesel engine components and offers services such as cylinder head remanufacture, cylinder block line boring, milling, honing and boring, camshaft grinding, crankshaft grinding, engine assembly and dynamometer testing. Its subsidiary Reef Fuel Injection Services offers Bosch, Delphi and Denso approved fuel injection services and is a specialist in CAT fuel systems.


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