invader
Veteran Member
So about 6 months ago, I developed this popping sound from the front end. When it happens, it is quite loud. There are actually two popping sounds, one on each side. They sound the same; just one comes from the passenger side and the other from the driver’s side. The sound happens most of the time when I accelerate hard or break hard. If I break hard, without accelerating hard afterward, the popping sound will only happen once when braking. If I brake hard again it will not pop until I accelerate hard again and cause the pop again. Then the next time I break hard again it pops again. I can do this either way, by braking or accelerating. Occasionally, it will pop when turning sharp into a driveway or in or out of a parking spot.
The entire front suspension was refreshed a little over a year ago with new Koni coilovers, new ball joints, new upper strut mounts, (actually camber plates), and lower control arm bushings were replaced with bearings that are supposed to last allot longer than the bushings.
The first thing I did was to replace the long sub frame bolts with the kit from ECS tuning. I re-torqued all the other sub frame bolts when I put the kit in. Made no differance at all. I fully checked the entire front suspension but could not find anything that appeared to be loose or otherwise have a problem. The CV joints seemed fine. The Sway bar bushings seemed good.
I just replaced the tires and got an alignment a few weeks back and had my suspension check everything in the front end again. He could not find anything wrong either. He was suggesting that it might be a cracked or broken firewall because he had seen that on BMW's before. He did not take the time to start pulling thing apart to look closer at the fire wall.
Anyone have any other ideas?
The entire front suspension was refreshed a little over a year ago with new Koni coilovers, new ball joints, new upper strut mounts, (actually camber plates), and lower control arm bushings were replaced with bearings that are supposed to last allot longer than the bushings.
The first thing I did was to replace the long sub frame bolts with the kit from ECS tuning. I re-torqued all the other sub frame bolts when I put the kit in. Made no differance at all. I fully checked the entire front suspension but could not find anything that appeared to be loose or otherwise have a problem. The CV joints seemed fine. The Sway bar bushings seemed good.
I just replaced the tires and got an alignment a few weeks back and had my suspension check everything in the front end again. He could not find anything wrong either. He was suggesting that it might be a cracked or broken firewall because he had seen that on BMW's before. He did not take the time to start pulling thing apart to look closer at the fire wall.
Anyone have any other ideas?
