There is no way that a factory equipped engine should have this problem. It is a design fault if the piston hits a spark plug under any driving conditions unless it is over-revved.
I suggest you contact Nissan to find out if this is a problem known to them. If not, report it and tell them that the dealer will not help you.
For the guys who are worried about decelerating at too high of an RPM... Uh, there is NO reason why the piston should contact the plugs if the plugs are right for the engine. If you have to avoid doing something while to drive to keep a piston from hitting a plug then you need a new engine. If you dropped to 2nd at 80, your tires should skid, your clutch might slip, etc, but your piston should not get "sucked" up to the spark plug.
I'm not arguing with what Lew said. He's probably right. But if it's happening on a brand new car it should be driven through the dealership's front window if they don't replace the engine and kiss your ass while they do it so you don't make it well known just how poorly made the motor in your car was.
Hopefully it's similar in Canada, but if you were in the states and your dealer was being a prick I'd tell you to go to the DMV with a complaint and make sure the dealer knows your doing it. Dealerships are licensed by the DMV and if they get enough complaints about a dealer they investigate. The dealer has to shut down while they're being investigated, which isn't good for business and they could be fined, lose their license, etc.
^^That's advice I got from a friend who happened to be a NYS Supreme Court Justice when a dealer was dicking me around.
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Is this forum still full of n00bs learning that you can't boost your daily driver on a part time retail income?
Yeah exactly... who wants to buy a car you can't beat the crap out of without worrying about closing the gap on a piston?
chances are likely this kid goes to 55 in 3rd and downshifts to 2nd, prolly snaps the revs to 6500 or so.......you do that to any car with a 6250 rpm redline, you'll prolly slap the piston too.
well he hasn't said that he's done that... I mean most ppl on this forum put the pedal to the metal all the time and never have to worry about this problem... it is a design problem if you have this problem...
and even if he over reved his motor by downshifting into 2nd at 60 unless the connecting rods break I cannot see how the piston should ever contact the plug... maybe destroy a few items in the cylinder head.
I'm guessing this engine is out of spec from what it should be. The ONLY way to over rev this engine is to down shift to too low of a gear from a higher gear. A easy mistake to make on a BMW M3 with Gods tranny and very close gears on the shifter. On our car, the tranny is notchy enough as it is. I don't see how a miss shift could be made.
Even with a miss shift, you would get valve floating. I've never heard of piston floating before. The crank, rods, and pistons shouldn't be able to strech like that. That engine just must be out of spec or something. Either the deck of the block isn't high enough, or the head was shaved down too far. Something isn't right and spark plugs hitting a piston is far from normal.
chances are likely this kid goes to 55 in 3rd and downshifts to 2nd, prolly snaps the revs to 6500 or so.......you do that to any car with a 6250 rpm redline, you'll prolly slap the piston too.
man what is your problem. i know how to drive. why do u keep saying this kid does this wronge, and he does that wronge. the most i ever downshifted too was maybe 4500. this motor is still new only like 6000 miles. and i do know how too brake in an engine, so save ur time and dont say that.
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