The car was on LPG, it did not match the fire. It was not accidentally insured and it is not an insurance fraud, as some people thought. The cause of the fire was oil, which, together with gasoline, splashed from the leaky block to the exhaust pipes.
The block probably cracked because of a bad lubrication, when it was likely that the newly replaced engine had poor cups on the crankshaft and leaked the lubricating pressure. When the engine has been replaced, there was put new gaskets, seals, wiring, etc. before instalation.