My 2007 Edge SEL AWD with 3500 miles (just got it about 3 months ago) seems to have what I think to be excessive valvetrain noise after starting it cold. Now I am pretty sure that the 3.5 has direct acting "bucket" tappets (cams act directly on valves though a "bucket" style tappet that fits over the valve/valve spring) which is a mechanical system unlike the roller follower/hydraulic lifter arrangement on the V8 Modular motors and the old 2.3 Lima 4cyl so it will be more noisy by virtue of the design. But, this seems noiser than it should be when cold. Not the typical "sewing machine" sound as when warm. Now the 2.3 Duratec/MZR 4cyl in my wife's old Mazda 3 and my Mazdaspeed 3 has some more noise on cold starts/conditions, and that engine has a similar valvetrain, but not as noisy as this.
Is this typical for the Edge and this engine? I am using 5w20 synthetic, but it did it with the stock oil as well.
Thanks.