Another brake job. I do this pretty often. These front pads lasted me 25,000 miles. I last replaced them five years ago. I live up this nasty >10% climb that eats brakes. Good thing I get free brakes and brake service. I took a few more photos documenting the steps for those who are interested in trying it out. This is a basic job that took me about fifty minutes including cleanup. I have some special tools that really speed things up that I’ll go over.
It’s a real money saver because pros really like to use brake work to over repair and charge naive customers. It’s a safety thing so people get really frightened into opening their wallet. I’ve been doing this for forty years on my vehicles. I rarely replace rotors, cylinders, lines etc. and only do pads. I don’t resurface. The car does that for you. Brakes are a scam. So with free lifetime brakes with Autozone and some cheap tools you can really save a bundle on the common maintenance item of pads which fall right behind tires, oil and batteries in order of routine car maintenance.
Get the car lifted on a Jack with proper safety stands. I play it safe. Wheels chocked with real wheel chocks. I’ve lasted decades under cars. I have an early memory of a car falling on a neighbor. I wasn’t there but my friend found his two legs hanging out from under the car. He was dead. Use stands. Three points or more of support.
Note the expensive impact wrench. Not necessary but it really speeds things up. I’ve gotten away with hand wrenches for years but I’ve recently migrated over to brushless dc impact drivers. Expensive but fast. Less upper body exercise though.
Well used pads. The rusty rotor is in the middle. Perfectly good for reuse. The friction material is the next layer. It’s 50% gone. AutoZone duralast pads have a lifetime warranty. I’ve discussed it here before. Free pads.
Caliper spreader. This $12 tool is a big speed up tool. It quickly and efficiently pushes the hydraulic pistons back into the caliper. For years I’ve done it with C clamps and levers but that takes 10x as much time. This tool makes the 50 minute brake job possible. It quickly performs the toughest part of changing disc brake pads. Once the gap is spread open you just pull out the pads effortlessly. If you’re going to do this buy some kind of purpose built spreader. This particular one works well on Mercedes cars. Turns a job that usually takes several minutes into several seconds.
Brakes out. Obligatory before and after shot. Old vs. new (free) pads. Wow. I waited too long. I really got my money’s worth out of the old ones. Wait, all of them were free.
Ok, pads out. Time to spread the pistons out a little more. Remember the new ones are much thicker than the worn out ones. I need more room. Just screw out the tool a few turns and bam, plenty of room. I used to do this with levers and c clamps as I said. Dumb. Use the $12 tool and get it done in seconds.
Prep your pads with anti resonance goo. Oddly I bought this bottle of CRC brake goop in 1985. I’ve used half the bottle. It’s still good. Keeps the brakes from squealing. Unbelievable BIFL bottle bought when I was in high school. I cannot even count how many brake pad swaps I’ve done since then. I grease the pins too. Big tubs of grease also seem to last forever too.
Effortlessly slip in new pads. Like shelving books. Now that the pistons are spread wide open I can literally drop the pads in. The spreader tool. Use the tool. Cheap at Aliexpress. Disk brake piston spreader. Saves time.
Retainer pins back in. Looks great. Mercedes designed an easy to service caliper. Pins poke out with a punch (or an old nail). Tap them back in with a small hammer.
Put the wheel back on. You can use a fancy ($11) torque wrench or a tire wrench. I like the fancy wrench because the precise torque makes removing the wheel more predictable next time with my electric impact driver.
Done deal. Now I just have to stop at Autozone and turn in the old pads for my 100% refund. I’ll blow it all at the Falafel truck.
I have finally hit the point financially where I can easily pay somebody to do this. However I won’t get any satisfaction from that. I hate sitting around waiting for the car. Arranging a drop off. Then getting over repaired when I know I just need pads. Pros will waste more than 50 minutes of my time. So I DIY.
Almost forgot to mention. Buy and wear a good respirator. You don’t want brake dust in your lungs.
