MavsFORMULA
11-10-2009, 03:07 PM
My new Z28 has had a list of problems I didn't know about when I bought it. The last one we have to sort, is this fairly consistent knock/clunk/crack or maybe pop that sounds like metal on metal/hard surface in the left/drivers front. It happens generally any time the front suspension loads or unloads slightly over uneven road or gradual bumps. We have had stethascopes all over it and cant track it down.. I should mention my front suspension/subframe is all BMR Tubular w/ one spherical rod end on each LCA.. It has LS1 brakes w/ Baer rotors. It also has Koni Single adjustable shocks and an Eibach/Ground Control Coil overs.
Now... So far we have had the brakes and upper mount out. The mount was replaced yesterday. The Spindles are powder coated and dont show any impact signs, along w/ either control arm. We added heater hose around the top of the coil spring, bc it had no isolator and wanted to be safe. Both ball joints have been greased along w/ the lot of the poly bushings. We can duplicate the sound when we jack the car up on the SFC and it unloads the suspension. My bolt in moly cage has a slight pop in it, but im pretty sure its not what were hearing much louder and to the front.. The only things left as suspects, my father and I imagine, are the ball joints, the Koni shock, and the spherical rod end. My uncle, who has managed GM dealers for years thought it was the upper strut mount(now replaced) and my father, who managed Toyota dealers for years, has never heard it before. We're stumped... Its consistant, somewhat loud, and very annoying. Im a perfectionist, someone please have experience w/ this and help me straiten this out... Thanks, to everyone, for your time!
Nick
Now... So far we have had the brakes and upper mount out. The mount was replaced yesterday. The Spindles are powder coated and dont show any impact signs, along w/ either control arm. We added heater hose around the top of the coil spring, bc it had no isolator and wanted to be safe. Both ball joints have been greased along w/ the lot of the poly bushings. We can duplicate the sound when we jack the car up on the SFC and it unloads the suspension. My bolt in moly cage has a slight pop in it, but im pretty sure its not what were hearing much louder and to the front.. The only things left as suspects, my father and I imagine, are the ball joints, the Koni shock, and the spherical rod end. My uncle, who has managed GM dealers for years thought it was the upper strut mount(now replaced) and my father, who managed Toyota dealers for years, has never heard it before. We're stumped... Its consistant, somewhat loud, and very annoying. Im a perfectionist, someone please have experience w/ this and help me straiten this out... Thanks, to everyone, for your time!
Nick