Hi,
I have a 2011 FX50 with only about 78.000 miles according to the dash. I've checked with the local Infiniti dealer and seems accurate, the car was used in Italy until cc 50.000 miles and then was sold to Lithuania in 2015. Just to prove - to myself also - that the car seems to have a normal mileage (about 10.000 miles per year), this is not an engine with a bazillion miles in it.
So the symptom is: transmission is in P (I mean: I don't have to drive the car uphills to give some burden) and when revving up the engine, from cc 2000 to 3000 RPM there is a rattling sound, and when stepping off the gas, and leaving the engine slow down, when I step on the gas again, at about 1500 RPM the rattle comes in again and continues to 3000 RPM.
See attached videos, the first one is outside the car so you can easily hear the rattle, the second one is inside showing RPMs but in this case the engine can't be heard so well.
You can see on the dashboard the engine is hot, or to be more exact, at normal operating temperature. The rattle sound does not get worse when the engine is cold, and there is no rattling when starting the engine, only between the above mentioned RPM's - or at least I can only hear it in this range.
Please anybody can confirm if this is piston slap? My mechanic insists it is.
Another possible cause for this rattling might be that the cats are not in a good shape; I had P0420 and P0430 (left and right cat efficiency not OK; the previous owner had them too because I could see he cleared them 300 miles ago before I bought the car) so first I'll go and have them checked: if the cats exist at all. The smell coming from the exhaust is quite bad, I'd say it's like the smoke of an old car without a cat, but my mechanic says it's like the car's burning oil.
I'll also drive the car for some hundred miles and check if it's consuming oil.
But until then, maybe somebody can tell now if it's piston slap or not.
Outside, loud, listen to this first and turn up the volume for the next one:
Inside, silent, be sure to turn down the volume if you switch back to the outside vid:
Thanks for everybody for reading
I have a 2011 FX50 with only about 78.000 miles according to the dash. I've checked with the local Infiniti dealer and seems accurate, the car was used in Italy until cc 50.000 miles and then was sold to Lithuania in 2015. Just to prove - to myself also - that the car seems to have a normal mileage (about 10.000 miles per year), this is not an engine with a bazillion miles in it.
So the symptom is: transmission is in P (I mean: I don't have to drive the car uphills to give some burden) and when revving up the engine, from cc 2000 to 3000 RPM there is a rattling sound, and when stepping off the gas, and leaving the engine slow down, when I step on the gas again, at about 1500 RPM the rattle comes in again and continues to 3000 RPM.
See attached videos, the first one is outside the car so you can easily hear the rattle, the second one is inside showing RPMs but in this case the engine can't be heard so well.
You can see on the dashboard the engine is hot, or to be more exact, at normal operating temperature. The rattle sound does not get worse when the engine is cold, and there is no rattling when starting the engine, only between the above mentioned RPM's - or at least I can only hear it in this range.
Please anybody can confirm if this is piston slap? My mechanic insists it is.
Another possible cause for this rattling might be that the cats are not in a good shape; I had P0420 and P0430 (left and right cat efficiency not OK; the previous owner had them too because I could see he cleared them 300 miles ago before I bought the car) so first I'll go and have them checked: if the cats exist at all. The smell coming from the exhaust is quite bad, I'd say it's like the smoke of an old car without a cat, but my mechanic says it's like the car's burning oil.
I'll also drive the car for some hundred miles and check if it's consuming oil.
But until then, maybe somebody can tell now if it's piston slap or not.
Outside, loud, listen to this first and turn up the volume for the next one:
Inside, silent, be sure to turn down the volume if you switch back to the outside vid:
Thanks for everybody for reading