Whenever I start my 06 Pathfinder after it's been sitting for a while I get a horrible mechanical grinding sound from the engine for about the first one or two seconds of the engine starting ... almost like the engine starts up faster than the oil can get up into the valves or cam ... the engine also revs up to around 2000 RPMs on a cold start which seems excessive. Is this normal? Anyone else experience this? ... dealer says it's normal.
my 2001 does the same thing. sounds like the rpms are high and oil starvation for one or two seconds, then all is normal. i dont know if this is a normal thing. i have changed mine to full synthetic amsoil oil so i am sure it's not a lubrication issue.
Whenever I start my 06 Pathfinder after it's been sitting for a while I get a horrible mechanical grinding sound from the engine for about the first one or two seconds of the engine starting ... almost like the engine starts up faster than the oil can get up into the valves or cam ... the engine also revs up to around 2000 RPMs on a cold start which seems excessive. Is this normal? Anyone else experience this? ... dealer says it's normal.
hmmm...have not really noticed that on mine. i will keep a close eye and will post.
I have the same thing on my '05. Pretty common issue, as oil drains off overnight. That first couple of seconds w/o lubrication is the hardest spot on any engine. I run Mobil 1 10W-30, considering swapping 1 QT out with an ester based oil, such as Redline, on my next change to try to help this. Overall though, I'm not too worried about it.
I have the same thing on my 05 pathfinder during start up.
I noticed that on top of the start up noise, I sometimes hear a similar grinding and almost static like sound when I accelerate and hit just above 2000rpm.
I'm not sure what it would be but I know that my 99 Maxima makes almost the same noise in the same situation except louder.
I'm running 87 octane in my Pathy and going back to 93 to try to remedy this noise.
I have the same thing on my 05 pathfinder during start up.
I noticed that on top of the start up noise, I sometimes hear a similar grinding and almost static like sound when I accelerate and hit just above 2000rpm.
Have you had this recall preformed?
NTB05015
This bulletin has been amended as of 10/31/05. The Parts Information section has been revised. No other content has been changed. Discard all previous versions of this bulletin. IF YOU CONFIRM: There is a rattle noise coming from the Variable Induction Air Control System (VIAS) Power Valve Actuator / Intake Manifold Collector at engine speeds around 2,200 RPM. AND The rattle noise can be controlled (stopped and started) by using CONSULT-II to turn the VIAS S/V "ON" and "OFF". NOTE: You must use CONSULT-II "Active Test" for VIAS system to confirm the rattle noise. Refer to the Service Procedure (page 3) for the CONSULT-II procedure. ACTION: Repair the Intake Manifold Collector. Refer to the Service Procedure (page 4). Confirm the incident is resolved by using CONSULT-II "Active Test" for VIAS system. See this bulletin for further detail.
That sounds like my problem although I'll be honest and say that I don't completely understand that bulletin completely. Where did you find that bulletin, and if I bring this to my dealership...they must fix it correct? What harm am I doing to my engine with this problem going on?
It could be the early problem of the VAIS rattle, but only if your truck was built before Jan. '05.
At around 2200 RPM on mild acceleration I often get pinging (predetonation), even with premium fuel (I've since switched back to 89 octane after deciding 93 oct. didn't help). According to the owner's manual, proper engine tuning for best fuel mileage is with a slight bit of pinging when the engine is loaded. The way you describe it as "static" makes it possible that it's just pinging.
You basically need to decide whether you have pinging, VAIS rattle, or something else...or let your dealer decide.
Linear Mode
