I managed to find what was leaking but how do i tighten it or remove it. It's the hose connected to the radiator.It has a small plastic piece with looks like it has a spot for a screw driver to be put in what do i do. Andy Y hope you can help me.
Hose leaking that fits on to radiator plastic connection on 2001 BMW 325i
It really depends on why it is leaking. The plastic cooling components are known to become brittle and crack as they age. You'll need to carefully inspect the hose connection and determine if that is where the leak is coming from. You may be able to tighten the hose clamp but you can only tighten those so much because the parts are plastic. Is the hose dry, hard, and/or cracked?