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The sound is akin to say a steel wrench hitting something cast iron. That is a lighter gauge hitting a heavier gauge.Quote:
Originally Posted by SeanC
ive had all under body removed for last 12 months whilst I diagnose, both to rule out as cause and because I was taking it off all the time to check something else.
im fairly sure it’s not a lightweight heat shield, it’s not a tinny sound.
I've got a similar sound on mine - 2013 3.0L
I've had a crawl around underneath to see if I could find something like a loose heat shield without success.
Happens when hitting the bump, will see if I can find a rough corner.
LCAs done a year ago, brake rotors and pads recently and calipers torqued + thread lock definitely not loose.
Thanks jwb, good to know I'm not the only one, thought I was going a little batty.
If I had a gopro I'd record the noise and post to aid identification.
I'll try torquing the calipers tonight (though it's going to be 38 in melbourne).
Got the same noise here! MY13, @ 109k.
My LCA recently done too. Although I need to confirm, I believe my noise is originating from the caliper slides. I can manually 'rattle' calipers by hand and I believe noise disappears with braking over corrugations.
Right, wheels coming off again tonight and not going back on until I'm satisfied calipers are tight on both sides.
MY12 hse with 179k.
Your phone should have a sound recording app.Quote:
Originally Posted by BushDisco
^^^^^^................ or it could be simply the problem I had in NSW once, a stone had got caught up in the FRH 'Stone Guard' (Not very aptly named [bighmmm]) at the brake area, although that may have been more of a rattle.[bighmmm]
I've thought about the stone guard as well that's the sort of sound. Will check.
Update, removed front wheels, again, checked all caliper bolts, everything tight. Also ran a socket set over every other bolt I could find underneath.
I'll take for a test drive but expect no different outcome.
Any other ideas?
Hi,
Have you checked the rear opposite corner, i.e. there’s always lots going on at all four corners, and if you’ve just confirmed all is tight in the front, then perhaps a look at the rear suspension is worth a look.
so when the front is loaded or unloaded, the other corners take / lose load, this is why I’m suggesting not to rule out other places. I also note that the steel chassis and all the items bolted to it can transmit noise from anywhere else making it sound like it’s coming from one particular place.
Could be rear Control Arms, or sway bar links/mounts. The sway bar has two metal stoppers and the sway bar is free to move laterally while being retained by the links to the LCA. If the sway bar bush is worn out, or not seated correctly, the metal limiting ring on the SB will hit the chassis mount. Same if the LCA or UCA bushes are worn, this allows excessive flex and metal to metal contact.
You also mentioned one’d it sounded like steel hitting a cast item, the only castings are the hub mounts / knuckles, and these are connected via ball joints to the CA’s, so it could be any of the ball joints worn out.
When applying the brakes, you are also loading up the suspension differently.
I realise it’s annoying and you’d want to get it sorted, I hope that you find it and fix it!
cheers,
Eric