Why does ford motorcraft discs not warrantied for warpage? My replacement discs are 1.5 years old with only 20k miles and I had to have them turned at my expense.

 

I'm sure you mean discs, right.

 

yes

 

Rotors don’t warp. They can collect brake pad material unevenly which is the cause for runout and vibration.
Either:

1. The new rotors and pads weren’t bedded-in properly (break in procedure)
2. The pads are to blame. Were the pads cheap and not Motorcraft? Assuming pads were changed when rotors were.
3. Driving habits. Too long of braking and heating them up too much is the usual suspect. This puts pad material down onto the rotor. Some people just ride the brake pedal too long before getting to their turn or stop. Or hard abrupt braking will do it too.

 

Everything was replaced by ford. New pads with new discs. I dont ride my brakes and my work commute is only 15 minutes but I could see my self at times with excessive braking. In my mind, my driving is not extreme enough to cause over heating and feel like its a quality issue. They turned the warped rotors and it is doing better at this time.

 

It is very possible to experience warped discs especially on the front.
One source of the cause is overtightening or uneven tightening the Lug Nuts.
It can distort the Hub flange were the disc is between the flange and the wheel center.
A warp can shows up with brake application as a pulsing and change with temperature of operstion during braking, time to time.
The pulsing is when the warp section goes through the Caliper friction increases at that point in rotation..
Biggest offenders are at inspection time, rotation time etc when not enough care is used.
Once a warp develops the is usually a permantly set condition.
Cheap replacements are often a problem after a short time in service. All cast iron and the aging they do, is not the same.
Good luck.

 

Generally speaking there are a few factors that cause "warped" rotors. Age is the #1 reason, followed by, as others have mentioned, improper bedding in procedure...something that far too many people ignore. I just replaced the rotors and pads on all four corners of my Nissan Maxima and am simply amazed at the difference...135,000 miles and I was noticing that under hard braking, like slowing from 85 - 95 mph on the turnpike to take the exit, I was getting significant vibration through the steering, almost to the point of being unpleasant. The new brakes are just BUTTER smooth. I followed an extensive bedding-in procedure recommended by the manufacturer though and it has paid off.
So, back to the question the O.P. posed; the answer is...neither Ford nor any other OEM can know how you did everything from the installation to the bedding in procedure, to your overall driving habits...so there is NO WAY they could or SHOULD be responsible. Modern rotors are precision milled/ground and leave the factory in perfect condition, unless you bought some Wing-Chang-Chung $19.95 rotors, then you get what you pay for.

 

This ^

My wife’s Taurus had no brake issues, until she went to the dealer to have a tire leak repaired.

The next time I drove it, I was sick to my stomach because I knew instantly what happened and it there was no way to prove it.

I rotate my own tires, and my tire guy torques my lugs by hand.

I also never come to a complete stop if I have done some heavy breaking.

So basically it’s a wear item, and they will just blame you. Even if it was their 300 pound gorilla that torqued your lugs.