Welding Aluminium Engine Block

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Welding Aluminium Engine Block. 300 amps and a water cooled torch will make this a breeze. The engine was running and was shut off.

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After cleaning the crack with a wire brush you should wipe it down with rubbing alcohol. Aluminum expands at nearly twice the rate of cast iron which creates a mismatch in expansion rates on bimetal engines with aluminum heads and cast iron blocks. I usuually use 4043.

I usuually use 4043.

Only the M60 and the European M52 engines are affected. This is a discussion on Welding Aluminum Block within the General Help forums part of the LSx Technical Help Section category. Only the M60 and the European M52 engines are affected. Some engine builders recommend honing mains that have steel caps with the engine block right-side-up and the caps on the bottom.