OEM wheel studs noise related?

So guys, after some lapping I have noticed a ticking sound (almost like rocks hiting the body, veries with respect to the speed) coming from the driver side wheel areas, only heard when turning. So quickly googled and found similar noises due to the lug nuts not being properly torqued. So I retorque my lug nuts to 150lbs, issues goes away. After some more hard lapping ( r compunds), a little bit of noise comes back. I let the car and wheels cool down, and seems the lug nuts need a little retorquing to reach 150lbs. Noise disappears. Are the stock studs weak link and stretch so that the lug nuts back off? I am using the lug nuts that come with the project 6 wheels.

Another gt350 had similar issue using oem wheels (pss) and nuts.

I would recheck the torque with a different torque wrench, just in case your current one is out of calibration. I'd also take the wheels off and look at the studs, you might have some that are stretched and about to break. I would imagine it will be pretty obvious when you look at them.

JustinLynn said:

I would recheck the torque with a different torque wrench, just in case your current one is out of calibration. I'd also take the wheels off and look at the studs, you might have some that are stretched and about to break. I would imagine it will be pretty obvious when you look at them.

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Thanks for your reply. Rechecked the torque and it's fine, will inspect further with the wheels off when I have some time. I see performance studs in my future for a peace of mind on the track.

Sounds like the well documented brake rotor hat pin noise to me. Very common at low speeds to hear.

cjgt350 said:

Sounds like the well documented brake rotor hat pin noise to me. Very common at low speeds to hear.

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Will Google thank you, would the noise go away with re-tightning the wheel?

I get the same sound from the passenger side when turning left at low speeds. I wrote it off as the rotor hat pin noise because the lug nuts were torqued properly.

Was every nut backed off on the wheel? Was it only one wheel?

If even just 2 or 3 lug nuts are torqued properly the wheel shouldn't be moving around and there shouldn't be noise from the wheel. Noise should only come if all 5 are loose.

I would check them a few times to see; if they are loosening up something is wrong. I'd be very surprised if you have an issue with Ford's wheel studs or Ford's lug nuts (assuming you are using all factory parts). If you are using aftermarket nuts, that could be the issue. Otherwise, maybe there was just some dirt in the threads or in the wheel or nut seating area that prevented them from completely seating the first time you torqued them.

My driver's side front is doing the same thing too. Shame on me though...I'm not sure what the rotor hat pin noise is. Can someone get me up to speed?

nastang87xx said:

My driver's side front is doing the same thing too. Shame on me though...I'm not sure what the rotor hat pin noise is. Can someone get me up to speed?

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What's there to explain? The rotors are made of aluminum centers, brass pins and steel rotors and so there are different materials with some slight amount of movement occurring between the brass pins and the rotors.

Hack said:

What's there to explain? The rotors are made of aluminum centers, brass pins and steel rotors and so there are different materials with some slight amount of movement occurring between the brass pins and the rotors.

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That's it?! Well that's not very exciting! I was hoping for something like an exploding engine bay from the hood shaking or lots of dramatics. I'm thoroughly disappointed. :cheers:

Hack said:

What's there to explain? The rotors are made of aluminum centers, brass pins and steel rotors and so there are different materials with some slight amount of movement occurring between the brass pins and the rotors.

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Stainless pins.

Epiphany said:

Stainless pins.

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Huh, I could have sworn they weren't steel. I found an article that said they were bronze coated
http://www.roadandtrack.com/new-car...stang-shelby-gt350-suspension-brakes-details/

I did find another article that you are no doubt very familiar with that says the pins are steel.

What was your source for your article?

The pins have been treated, yes. Beyond that, I have factory drawings that just might delve a little deeper.

Epiphany said:

The pins have been treated, yes. Beyond that, I have factory drawings that just might delve a little deeper.

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Is the article that says bronze coating correct?

I can understand why a coating would be a good thing. I've never heard of a bronze coating though. It definitely is better for reducing galvanic corrosion than an entirely SST pin would be.