My G35 has less than 30,000 miles and the brakes started to squeal. I replaced the pads all around, and they still squeal. I then removed each wheel and cleaned all of the parts and also made sure I used the silicon grease as well. It's been over a month and they still squeal. Does it matter what brand of pads I used? Do I need to have the rotors spun? Please advise.

Since '07 rotors are known for tendency to develop warp/judder issues, and you've gone 30k miles already on them, it seems highly unlikely that NOT turning the rotors would produce a favorable result. Others may disagree, but as far as I'm concerned, and with very few exceptions, you should ALWAYS turn your rotors when you put a new set of pads on.

.02

Some pad materials make noise more than others. I have ceramic pads on my wrx and g35 and they both are very quiet. Not sure if you cleaned and re-lubed the pins, but that is something to consider as well.

Turning the rotors is not neccessary unless the finish is scored or have other imperfections (glazed, heat spots, etc).

Did you use ceramic or semi metallic pads?

The noise could be caused by semi metallic pads or if the pads are loose. Did you discard the pad retainers/clips?

I just fixed my squealing issue on my 07 with recently replaced brakes

See My thread: https://g35driver.com/forums/g35-sed...-included.html

Turned out the brake clips were too large and needed to be trimmed, they were just touching the rotors.

I still have the clips . In fact, I was able to use them on the new pads however, the squealing is still there. The pads are quite stationary. There are no heat or spotting issues concerning the rotors. No scarring, scoring or anything that would suggest an imperfection on the rotors.

*** SIGH ****

Do you really think that after 30k miles there aren't imperfections??

Even if you can't see them see them easily with the naked eye doesn't mean they aren't there. Obviously, you can hang new shoes on practically any condition rotors; the question becomes: How long with the brake job last without issues or premature symptoms.

People post this stuff all the time about just hanging shoes without turning the rotors. I honestly don't get it. If it were some old beater or a work truck, then sure, go ahead. But this is a somewhat more evolved animal and doing less than an appropriate job just seems short sighted. Whatever you think you're saving by NOT turning those rotors will be lost in the long run, I can practically guarantee it.

If you don't believe me, try and call ANY reputable brake shop and ask if they'll offer any kind of warranty on a brake job you've spec'd out as "just hang new shoes on my unturned 30k used rotors". GO ahead; I'd love to hear your results.

Sales tactic...they make more money scaring old ladies into paying for work they may not need. I'm not saying you shouldn't ever turn them but it should always be based on an honest inspection.

OK . . .You all can go ahead and do it. I promise you that you WILL NOT get the full lifespan out of your new set of shoes; no way!

Personally, I don't care to redo my brakes more frequently than necessary.

Obviously if there is noticeable issues with the rotors they need to be turned. I'd rather just replace the discs rather than paying to get them turned.

Now, if there isnt an issue then I dont think they need to be turned. I dont question that you might not get absolutely 100% of the pad life by bypassing getting them turned, however its a matter of pay-off. Considering the cost of brake pads and how easy they are to replace, are you really going to lose $75-$100 worth of life out of the pads to justify getting the rotors turned? Even if you got 25% less brake pad life it doesnt pay off. If you got like 75% less pad life then yeah its worth it, but that's not going to happen unless the rotors are messed up.

Well, completely aside from the fact that you can't tell a rotors true condition by eye, this cost/benefit calculation really ONLY works out if you value your time at zero $$.

The simple reason why shops won't warranty a job that didn't include turning the rotors isn't because they just want to soak you for more money; they simply can't afford to pay the labor for going back and fixing any resulting shortcomings, inevitable or not. It's just one of those crazy quirks of human nature that there never seems to be enough time/money to do a job right the first time, but there is to do it all over again.