I have a 2004 4x4 Ranger 4.0 engine.
Recently, I noticed a slight rumbling right at the point of start-up. Almost instantly the noise goes away. When I first heard this slight rumble I turned off the motor and restarted but no noise on second start up.
The noise seems to be coming from engine compartment or perhaps it is something to do with A/C or interior heat. Does anyone in here have any clues as to what this is or perhaps someone has had the same rumbling noise. I would welcome and appreciate any comments.
Thanks in advance!