I have a friend that owns a 2004 350z that says while he was driving around 40mph, the engine started to smoke and make noise, he shut it off, than restarted and it would not start. after getting it to the shop, the removed the engine, the rear piston, on both sides, was gone!!! it look like it blew apart, the rods was there but no rear piston!! it broke the camshaft in half, bent valves, how can this happen, or if someone has seen this, can tell me what happened??? i find it hard to believe just driving at 30-40 mph and the pistons exploding can do this??

thanks for any help or thoughts!!

 

No oil in it?

I'm sure there's a whole lot more to this story than "I was just driving around at 40mph and my engine blew up".

Did he forget to shift out of first gear?

 

Don't see much of a point in this thread. The guy mustve had some type of oil pump failure or no oil as stated above. Either way, wondering why won't bring the motor back.
Jus saying.

 

just trying to see if anyone else had this issue, it did have oil, only reason i am saying this is because none of the parts are blue in color, but it could of been a oil issue. i may have to agree with the no shift issue, it is a manual, is there anyway of checking the computer missed shifts???

thanks again!

 

Was this vehicle stock?

 

Rear pistons run hottest since they don't get as much coolant. I wonder if he overheated the crap out of it, blew a headgasket and kept driving...ect...

 

The amount of damage you describe sounds like something broke loose at a very high RPM, or lots of power was being generated.

Surely the mechanic that opened it up has a better idea of what might have caused it.

As for this happening to anybody else - sure, just check the FI section, it's full of blown engine stories.

 

Are you sure it's not your car? Got pics of damage?

 

thank you!! that is some great info!!

 

LOL!! no my car has only 6500 miles on it, she still is getting broke in. i can upload a pic tomorrow!!

 

 

LOL!! I will have the pics in the am!!! thanks!

 

"My friend" threads are not allowed. Check rule #9.

 

hahaha lols... nice one davidv

 

LMAO

 

"Rear pistons run hottest since they don't get as much coolant."

They get just as much as any other part of the engine. I'd say the Nissan designers are probably capable of designing the cooling system so there are no hot spots that would lead to catastrophic failures. Coolant passages can be designed to direct the flow where it's needed. It's not as simple as "in the front and out the back".

I'd like to know more about how the car was driven and maintained. I bet there was some serious abuse or neglect going on.

 

OP - were you riding in the car at the time of the failure? I'm guessing not. Without accurate info on how the car was maintained, if it was abused, prior signs of problems and a description of the actual failure, this whole thread is pointless.

Unreliable third party speculation is not going to find the answer - this will become another internet urban legend.

 

I lol'd at "Exploded".

 

FAIL......................