So i purchased a used g35v36 2007 which looked good as new only been driven 80000kms which was a real good bargain as the other g35s being more than 150k kms as it is an older car model being 2007 or 2008 everything was going fine until an ignition coil got burnt and the car started misfiring so i put in a new ignition coil the misfire got very low but the car still felt sluggish after hours of not finding the problem i took it to my mechanic friend who himself after hours couldn't understand what the issue was, so i went on and purchased all 6 ignition coils and 6 spark plugs new and installed it still the car had jerking issues and was no difference so after spending a lot of money i planned on driving the car until there is a check engine light , so after driving for 3 days me being an idiot and have just bought the car decided to do a pull on sport mode so as soon as the car hit 160kmh the engine lost power and felt like there was no compression, the oil leaked from below like a river, the shop i took it to for a new engine was a friend of mine said somehow the water pump broke out and the timing chain broke and the chain cover from under broker cause the oil to leak he said there is possibility something hit the engine from the under as the engine also got cracked from the under.

Me Being me still am curious what exactly was the cause of the engine blown if anyone has any idea?
PS. the engine couldn't be rebuild and i need a new engine for my car and all the new spark plugs got completely burnt as crisp

 

Hard to say without actually seeing the car in person. Pull the motor and see if it spun a bearing, that's my guess. Spun a bearing, locked up and broke something at the crank/rods and the shock of smashing the valves also took out the timing chain. I'd be surprised if anything at the front of the engine with the timing stuff was the actual cause, it's all very robust. Unless someone had put in a water pump and didn't torque stuff back down properly.

Was it going through coolant (dripping or just needing to be refilled) before all this happened?