A whining or buzzing type noise may develop from the timing chain area caused by excess slack in the secondary timing chains. Nissan has issued a service bulletin (NTB09-128) regarding this issue. Replacement of both secondary timing chains and their tensioner shoes will be necessary to repair this concern. As part of this repair, the engine oil and filter should also be replaced.Google+
Car Problem Reports
Nissan Pathfinder Noise From the Front of the Engine
Nissan Pathfinder Problem
Engines Affected: 4.0L V6, V8
Average Mileage: 86,987 mi (4,000 mi - 158,000 mi)
Visitor, 2006 Nissan Pathfinder, 140,000 mi
Whining noise ,converter, electrical, fuel sensor,oil sensor, this is the worse car, Nissan will not get my business again and I will tell others not to buy any Nissan.
Visitor, 2007 Nissan Pathfinder, 80,000 mi
I just recently had my '07 Frontier in for regular service and was told by the dealership service rep that I needed to have the timing chain replaced to the tune of $1800. I have had the truck serviced regularly at all appropriate intervals by this same dealership. Now they tell me this needs to be fixed. I'm very disappointed and frustrated at Nissan for not generating a recall/repair on such a major problem with their vehicles. From what I've been able to read this is way too common a problem for them to ignore and not resolve for their customers. Until this happened, I had a very good impression of Nissan vehicles; now I'm not so sure. They cut corners and are capable of building junk just like all the others.
Overall I've been very pleased with the truck and it's been nearly bullet proof (except for having to put two batteries in it over the last 3 years and this dealer replacing the rear breaks when they should have replaced the front brakes). Really angry and frustrated about this situation - it's not like you can't leave the issue unaddressed but I hate the fact that I'm supposed to pay $1800 to have this fixed, a basic engine component that should be covered under warranty.
Visitor, 2005 Nissan Pathfinder, 134,000 mi
Knocking noise coming from from engine, and it sloping and idling night when it accelerates.. Noise is extremely high.
Visitor, 2006 Nissan Pathfinder, 84,000 mi
My wife's 06 with roughly 84-85K just started this noise two days ago, only on cold starts though...
Almost sounds like gravel being thrown onto a piece of aluminum (like the heat sheild). Does that sound about right?
Verified for the Nissan Pathfinder
A whining or buzzing type noise
From the front of the engine. Found out there was a recall and had it repair at the local dealer. Just today the engine make a noice similar to air flowing through the engine almost like an air conditioner running in the engine department.
Visitor, 2008 Nissan Pathfinder, 4.0L V6, 99,000 mi
same problem. Had timing chains and tensioners replaced 5 months ago and now its doing it again!!!!
Visitor, 2007 Nissan Pathfinder, 95,000 mi
makes loud whining noise and shakes over 40 mph and sometimes at 60 mph. i am so worried.
Visitor, 2006 Nissan Pathfinder, 135,000 mi
Truck makes a whining noise when gas pedal is pressed.
Visitor, 2007 Nissan Pathfinder
Timing chain - loud buzzing. $1750. Ouch
Visitor, 2005 Nissan Pathfinder, 60,000 mi
Two years ago, dealer recommended replacing the timing chain for about 2 grand (they have to basically take the entire front end apart to get to it). Engine has a higher pitched whine than it did originally. Timing chain is not a service item so obviously this is a vehicle defect and the company isn't standing behind its car.