I'm extremly satisfied with my car (320i E36),but there is something not ordinary is happening.
I'll describe it for you...maybe you'll get the picture.
When i start my car,after 10 or 15 secs,and sitting in the driver's seat,i feel 1 or two trembling of the motor .
This issue is repetitve but not continuous.
When i put my palm hand in front of the exhaust,i can feel what is happening.
The air coming out is periodic but it occures after a moment or so ,that this air is coming out like a "boom" on my hand.
it's like that : periodic periodic boom periodic boom periodic periodic boom
Note:this phenomenon occures only when the car is in Park or Neutral mode.
lol got the idea???
The car works great,has no fuel problems,no oil problems,it circulates great.
So...what could it be ???
Note: last year,my engine had an oil problem,it was burning oil.
For that,i had to put 2 kilos every month.
I used a high visocity oil (because he's much cheaper).
This year,when i fixed my motor,my mechanic told me that the "poussoirs"(i don't know the word in english,so i wrote it in french"...i think it means :"Labyrinth bucket type tappet")are somehow "stuck" because i used a high visocity oil, and they shall be released in time (as long as i circulate).