It started with no hustle this morning and drove about 5 from my house and back safely without any malfunction..5hrs later I tried to start it but it wouldn't. So i opened the bonnet to discover that petrol was leaking from under the gasket of the exhaust.. So i separated the exhaust chamber from the engine itself where i could see pistons and other stuffs(it had 4 chambers and the first chamber was oozing petrol into the exhaust compartment.....still it wouldn't start....please help.