Postby smj999smj » Wed Mar 24, 2021 5:50 pm
The VQ40DE upper timing change issues affected some 2005 through 2010 models and it causes a "whining" noise, not a ticking noise. Ticking noises can be caused by a number of things. An exhaust leak at or near the manifold can cause such a noise. There have been some reported cases or cracks in or around the flange area of the exhaust manifold...and a leaking exhaust gasket could also do this. A fuel injector can make a loud ticking noise. At start-up and especially in cold temperatures, "piston slap" can be something that can be noticeable...but is usually more of a tapping noise. Sometimes something as simple as a particular brand of oil filter can cause such noises to occur.