“Joe down the road at the service station can’t do a brake job on this car, you know,” a line mechanic at a Japanese auto dealership told me as I was taking my first look at a new FWD model.

“Why not?” I asked, incredulous.

“Because you can’t get the damn rotors off without tearing the whole front end apart.”

This was years ago, and I was surprised that yet another Japanese car maker was doing it to us. Sure, older Hondas were designed so that disc removal required major surgery and a slide hammer the picking up of which could cause a hernia, but that company rectified the situation in their later products, and I expected their homeland competitors to follow their lead. But noooo. Model after new FWD model arrives from Asia with rotors that are difficult and frustrating to R&R (Remove & Replace).

Cultural differences

Why? After all, domestic and European auto manufacturers manage to turn out vehicles with rotors that practically fall off when the wheels are removed, so how come the orientals don’t do it? I suspect the underlying reason has to do with a lack of understanding of the American driver. Japanese engineers seem surprised to hear our complaints about this service complication. “Remove rotors? What for?” they say. “In our country, people take care of their cars, and pad replacement is considered normal maintenance. Nobody lets them wear down to the point where they damage the discs. Besides, most cars in Japan are retired when they’re three years old.”

Well, it’s a little different here, pal. We run ‘em till they break, then we start looking for a mechanic. Most motorists don’t even give brakes a thought until they hear that nasty grinding noise, and by then those rotors are going look like they came out second in a hatchet fight. Refinishing discs has been about as common a job as changing spark plugs.

Aftermarket answers

Fortunately, we’ve got that font of Yankee ingenuity, the automotive aftermarket, on our side. If something’s difficult, it’ll give us what we need to make it easy. And this case is no exception. You say you can’t get those rotors off? No problem. Step right up and we’ll sell you machinery that’ll resurface them on the car (or in situ, if you like Latin). And it’ll be useful for other applications too. For instance, suppose you’re confronted with a ‘Vette or another RWD car that has rear discs that are hard to remove. Same situation, just a different end of the vehicle, and the machine can handle it. Or, how about a conveyance with easily-detachable rotors, but which suffers from braking vibration or pulsation even after the discs are cut on a bench lathe? Maybe there’s a hub/rotor mounting discrepancy — I’ve seen runout grow from zero on the arbor to as much as .008 in. when installed. Again, this type of equipment can do the job.

Don’t do it?

But now everything’s changing as carmakers have started to make downright iconoclastic statements on rotor service — namely, if there’s no vibration or pulsation complaint, leave them be. See the next section for a full discussion of these tradition-busting recommendations.