Alfa 156 Knocking Sound when in motion
Hi all... Just bought a 2001 Alfa 156. Drove it back from the seller which is 1½ hours drive. Mostly motorway. I noticed at high speed there's a very slight but constant knocking sound thats been transmitted through the body. I can't place wether it's at wheel level or further along...maybe steering, drive shaft? its hard to tell. I also noticed it sounds louder as i slow down, especially from high speed. The odd thing is there's times when it's not there at all? I checked the wheel nuts. Tried rocking each wheel to check bearings. Not sure what else to look at. I've breifly shown my mechanic who's having a closer look at it on Monday. His first thought's (but can't be certain) were that it could be coming from the Nearside front wheel.
Any help here would be great. Thanks