The weather has been yo-yo-ing this spring, but I decided it was time for summer wheels.
I had my son (and intermittently, daughter) out there 'helping' me
Yes he's in shorts, tshirt, and sandals, but it was only about 43° F out. Perpetual summer guy.
I've complained about it before, but over the whole winter I've been having this metallic 'crunch' / 'screech' sounds from the front suspension on bumps.
Originally, I thought it was the spring coils touching on deep compressions, but then I seemed to notice it a bit on lesser compressions as well. It also seems to be louder / higher pitched at highway speeds.
I know
@Denwood suggested some bushings might be noisy, and due to winter cold and general miserable-ness I hadn't investigated or lubed anything up yet. But this whole thing had resurfaced when I changed to my winter wheels last fall. I found that very odd.
Anyways, I already had a rubber spring coil isolator installed on the top coils of the front springs. I had ordered some more, so with the wheel off, I added one to the bottom coils of the spring, too.
Pressure washed everything real well. I had used Fluid Film on the suspension bits last fall, and made sure to wash off all the grime and any salt.
And then wheels back on.
Yes, I've got my Safety Crocs on.
In the back, I noticed one of the shocks had a large scuff all the way through the paint with a little surface rust. No idea what would have caused this, but slightly concerning??
My winter wheels use centering rings. Sometimes they get stuck on pretty good. After all these years, I finally had a
Eureka! moment and realized they have tabs you can pull with pliers
Got the tires aired up, and went for a drive. In fact I've been for several drives so far.
And... no screeching. What!?!?
Now, I cleaned the suspension bits, added the additional coil spring pad, and swapped the wheels. So multiple changes at once.
But gut feeling... I think it's the wheels somehow. I didn't jack up the control arm with the wheel off, but it seems unlikely the coils would be touching.
I don't really understand. The only thing I can think of is my winter wheels have a more outboard offset (pretty flush with the fender), and the BBS are a bit more inboard by 10-15mm. Maybe the winter wheels are rubbing? It always seemed like a metallic groaning sound to me, but I guess I don't know what 'rubbing' sounds like. And it would maybe explain a louder, higher pitched version at highway speed.
Honestly I'm stumped. But every bump I've gone over so far hasn't triggered it with the summer setup back on. I need to hit a good parking lot speed bump to be sure.
I was literally about to order coilovers if it persisted, but now I'm second-guessing and scratching my head.
¯\_(ツ)_/¯