Metal on metal sound (clanking)

Bartruff1 · #1 (**permalink**) 05-18-2009, 01:41 PM

occasionally coming from the right rear...I did a search, but too much data to sort thru... trunk is empty or is it a boot?...Shock bolts ok...this is not a bushing or a fiting or a rubbing and it is an occasional noise...it has been on a rack....much tightning and oiling.....has there been a common source that has been identified...the car is relatively new...2008 build ?? Thanks in advance for any clues...

Blas · #2 (**permalink**) 05-18-2009, 01:52 PM

Check the trunk support glide.

Clayboy · #3 (**permalink**) 05-18-2009, 04:19 PM

I have been having the same issue. An occasional clanking in the right rear, usually at low speed. I too have checked under the car for anything loose or rubbing and have come up with nothing.

I am planning to replace the original shock mounts with the new upgraded Performance Unlimited mounts. I was thinking that might be part of the problem...even if it's not it looks like a good upgrade.

Thanks for the tip about the trunk support Blas. Although it doesn't sound like it is something that lightweight. I will check that tonight.
Bob

jhv48 · #4 (**permalink**) 05-18-2009, 06:18 PM

When you figure it out, let me know too,

Got a clunk in the right rear when entering a driveway on a right turn while going anything but dead slow.

Drives me nuts!

Got the Bug · #5 (**permalink**) 05-18-2009, 06:34 PM

Quote:

Originally Posted by Bartruff1

occasionally coming from the right rear...I did a search, but too much data to sort thru... trunk is empty or is it a boot?...Shock bolts ok...this is not a bushing or a fiting or a rubbing and it is an occasional noise...it has been on a rack....much tightning and oiling.....has there been a common source that has been identified...the car is relatively new...2008 build ?? Thanks in advance for any clues...

Take a look and see if there is any contact at all between the trunk and the body of the car. Mine shows a little abrasion between the two surfaces, which causes a little rattle/clunk from time to time. I tried putting a very thin piece of mylar between the surfaces and it helped.

The other thing that you might want to look at is the sway bar mounts. Mine were make some noise and per Madmaxx's suggestion, I unbolted them and applied some dielectric grease and the noise went away.

May not explain the clanking noise, but a couple of things to look at.

Trackside · #6 (**permalink**) 05-18-2009, 06:56 PM

Make sure all the bolts on the differential housing are tight.

Got the Bug · #7 (**permalink**) 05-18-2009, 07:09 PM

You might want to also check the bolts on the half shaft. Some people have experienced issues with bolts coming loose.

Bartruff1 · #8 (**permalink**) 05-18-2009, 08:36 PM

Quote:

Originally Posted by Clayboy

I have been having the same issue. An occasional clanking in the right rear, usually at low speed. I too have checked under the car for anything loose or rubbing and have come up with nothing.

I am planning to replace the original shock mounts with the new upgraded Performance Unlimited mounts. I was thinking that might be part of the problem...even if it's not it looks like a good upgrade.

Thanks for the tip about the trunk support Blas. Although it doesn't sound like it is something that lightweight. I will check that tonight.
Bob

when it is not locked up right...but...this sounds like a much thicker gage...more like a clamp ... something loose... I thought for sure it was the rods for the top, about that thickness..... not necessarily on irregular surfaces but under some sort of torsion...I'll check the trunk rub and recheck the bolts on the half shaft and diff. in the morning...annoying..

ou812545 · #9 (**permalink**) 05-18-2009, 09:04 PM

I have a similar clanking noise, but I believe it's my seat belt latch on the eye bolt behind the seat. I hear it when I come to a stop or move around in my seat. A metal to metal clanking sound.

JCoop · #10 (**permalink**) 05-19-2009, 07:26 AM

Could be the old E-brake calipers. They make noise on bumps, etc. on my SPF.

Blas · #11 (**permalink**) 05-19-2009, 08:08 AM

Have you inspected your drive shaft hoop? Maybe look for a rub mark. And how about your rear sway bar connections, are the rubber pieces secure. You car is quite new so I would guess they are fine...With the rear wheels off the ground, is there any side to side movement of the tire and rim? That could be caused by a loose wheel hub or axle nut(s) Brake calipers mounting bolts tight? Spinner tight? Do you have the newer parking brake desigen? Does it work well? If not, maybe a loose brake pad or PB pad? All things to check if you have not yet.

bobbymac · #12 (**permalink**) 05-19-2009, 09:59 AM

Check your rear upright I had bearing outer race spin in the housing.Look for any metal on inside of rear wheel by cv joint.

Clayboy · #13 (**permalink**) 05-19-2009, 03:40 PM

Last night I checked the trunk support strut...several of the bolts were not quite tight...maybe needed only half a turn to tighten them up. So that wasn't the problem.
Tonight I will try to check inside the cv joint for metal and the differential housing for any loose bolts.

Bartruff, I know it's not the top rods because they aren't in the trunk and haven't been since I bought the car.

Blas, I have checked the drive line hoop and there's no sign of any rubbing or anything hitting it. I previously tightened up the parking brake cable (it now holds) so it is not the cable hitting somewhere.

And so it goes...the mystery continues.

Bob

jhv48 · #14 (**permalink**) 05-19-2009, 03:50 PM

Some of these cars just make noises regularly.

Creaks, clunks, squeaks, clanks. As long as nothing is falling off, I will learn to live with ithem.

Bartruff1 · #15 (**permalink**) 05-19-2009, 04:50 PM

Now that I am reasonable sure it is just a noise and not a hazard, the noise is more tolerable...

bobbymac · #16 (**permalink**) 05-19-2009, 05:03 PM

I would not overlook any unknown noise especially when making a left or a right turn and you hear a rubbing or metal to metal sound.I would also check the inside of your disc break rotor for any metal wear.When my bearing outer race spun inside my upright I noticed a grinding sound when I put stress on that area.Superformance made good on a new upright and a new style of bearing.

Clayboy · #17 (**permalink**) 05-19-2009, 05:07 PM

I guess it's just me, but I find it really annoying. Especially the part about not knowing what is making it. To my mind it's not a sound that I should be hearing.
Bob

madmaxx · #18 (**permalink**) 05-19-2009, 05:36 PM

Make sure you check the half shaft bolts on both sides, do not assume because the paint is lined up they are tight!!!! Also jack up the car and hold the wheel top and bottom and there should be zero movement, really try to push the assembly around, i know you are old so get a young guy to do it, LOL!!!! If all you bolts on your half shafts are tight, no play in the wheel hub assemlby, shock mounts are not a concern then i would not worry about it.

On a side note I raced a brand spanking new 2009 Porsche 911 Turbo yesterday, holy sheet it was fast, I was disappointed I did not walk away from him and he was disappointed he new car got beat. It was the closest race I ever had, he never left my rear fender up to 130 mph then I got off it. Needless to say his brakes and suspension were exponentially better than mine. I do not shift hard so I am sure that allowed him so breathing room but none the less a 911 turbo deserves respect.

Jerry Clayton · #19 (**permalink**) 05-19-2009, 05:41 PM

any unknown noise is a hazard---especially if you can hear it over side pipes and it happens over bumps or starting forward or stopping----They should not be noises you can live with-----they are sorta like that old saying--found dead sitting on his seat belt

cdog · #20 (**permalink**) 05-19-2009, 07:51 PM

I had exactly the same issue. Turns out it was the brake pads moving around.

Make sure your regular brake pads have retaining clips. Mine didn't and they don't make them for mine, so I moved the pads from the passenger side to the driver's side.

Clanking disappeared. Another option would be new pads I guess.