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YOUR RESEARCHSlight Noise - Need Help
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Check but it is the easiest
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Suggestion
Only after I put on 4 new tires -- they were due to be replaced -- could I then hear the wheel bearing noise.
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I was cruising down a hill for a couple miles, radio off and car in neutral. Very quiet so I could hear the sounds the car made.
Happen to notice that the temp increases with speed. Can't tell if it is the tire or something else.
It is not a click click noise, so do not believe it is a nail. More of a muted sound, kinda like a flat spot in the tires.
Wheel bearings?
Thoughts?
Touch your wheel lugs after a drive. If the are warm your are OK. If they are hot then you might have a bearing problem. Not the best way to check but it is the easiest.
How many miles on your tires, how old are they, and does your Porsche sit for long periods? My wheel bearing was bad and sounded like it could be a tire issue, but it wasn't.
I have about 10k miles on the tires. Just about 1 year old. Does not sit for long periods. No more than a a couple days. Except during the LONG winter.
Can you tell which wheel, or more than one?
Oh, and I grew up in Cleveland (Go Browns!) and there isn't a single hill close to a mile. Were you in West Virginia?
Could be normal tire noise. Hard to say of course without hearing the noise. But as these high performance tires age, are subjected to heat cycles, they get harder and noisier. One car (Boxster) had a bad wheel bearing that was masked by tire noise. Only after I put on 4 new tires -- they were due to be replaced -- could I then hear the wheel bearing noise.
With the car coasting in neutral down a hill under the right conditions (no traffic noise and with vegetation or other stuff on either side of the road that absorbs some noise frequencies better than others or reflects some better than others) you can hear some things you would never otherwise hear.
Anyhow, if you tell me tires are new, properly inflated, balanced/mounted, and N-rate tires then nevermind.
One test that would have helped: Next time touch the brake pedal and see if at some point of increasing brake pedal pressure the noise stops. If it does see it reappears if you release the pedal.
If touching the brake pedal makes the noise go away or changes its characteristics (provided of course you don't slow the car down too much) and removing your foot from the pedal has the opposite effect, then the noise could be one or more pads dragging against a rotor and with a little runout the rotor and pad lose contact just a bit -- cause there's not much runout -- you hear this as a noise that keep time/tempo with vehicle speed/tire and wheel rotation.
If the car is a manual do the same thing with the clutch pedal. If fully depressing the clutch pedal makes the noise go away (the most common outcome if the pedal depress has any effect at all) then the noise is the uh the uh... I'l have to think about this.
Sincerely,
Macster.
