2011 Holden Commodore Omega VE II 4D Sedan – Car is at workshop. Oil sludge found in engine (engine

2011 Holden Commodore Omega VE II 4D Sedan – Car is at workshop. Oil sludge found in engine (engine is currently disassembled). Requires new engine however car in otherwise good condition. Could you please provide an approximate quote. Thank you.
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BLACKTOWN