Hey guys, Need an input regarding a noise on my 2009 4 cyl escape.
The car have 10 000km and in the morning, when I start the car, I have a engine-related noise the first minute or so.
The noise is directly linked to engine speed. In my books it sounds like valvetrain noise but its hard to tell really. Its spring here and its starting to be hot in the day like 20 degrees but its still almost freezing at night. I noticed that the noise is louder and takes a min to go away in the morning when its cold in the night and less when its more moderate outside. I have yet to have a really warm night but last night it was kind of warm and the noise was gone really quick (5 secs of driving).
the noise sound like : pfft-pfft-pfft-pfft..not a direct metallic tapping noise. still not a good noise to hear on a new car.
Now I have 2 therory:
First is that for some reason the oil is not going up in the engine fast enough? When its cold the oil is thicker and maybe theres the link with the temp outside. However I have syntetic 5w20 in there and its not extreme temp either. The oil level is good. Also after a warm day sitting at work the noise doesnt seem there... I understand the car sits like 14-15 hours at night and only 8 hours during the day. Maybe 8 hours is not enough to let the oil drain all in the pan. but is 14 hours enough? And why would it do that? Faulty oil pump?
My second theory is some kind of exaust leak. Maybe until the exaust warms up a little there is a kind of small leak on a joint or something that cause the noise. and that would explain it with the temperature. but can a exaust leak sound so..rythmic with RPM? I dont know.
If anybody wants to chime in or maybe somebody noticed something similar on their model.... My dealer is far off my house and this is the kind of issue thats not super easy to diagnose for them. I would like to have and idea before giving them the keys and leave my beloved truck
thanks ! and have a good day folks