The 6th or 7th generation Honda Civic is one of the most common cars on the roads. While you have probably performed numerous brake jobs on Civics, there are some failures and problems that may sneak up on you.
BASICS FIRST
The most basic and often-overlooked detail is a thorough inspection of the total system. While the front pads may be the obvious problem that got the Civic on the lift, it’s our responsibility, and opportunity, to inspect the entire system. Take a good look at the rear shoes or pads; we’ve seen the friction material separate from the shoes on some older cars.
The safety consequences of this problem are obvious. Also take a look at the hardware, including the self-adjustment and hand-brake mechanisms. Don’t overlook the wheel cylinders; check them for leakage as well as free movement of the pistons.
Hopefully you recommend and sell a brake fluid flush along with any brake service. This is the time to be sure the bleeders will open and aren’t plugged. At the same time, look at the brake hoses and the steel lines to confirm their condition.
Honda Civics uses the familiar turn back-type caliper with the rear disc brakes. What we’re looking for here is even wear of the pads.
Check the hand-brake system to make sure it’s operating freely, and check the condition of the cables. Are the protective rubber boots still intact, or can you see the rust on the inner cable? If the cable looks good, unhook it from the caliper to confirm its condition as well as to check for binding in the mechanical part of the caliper.
When it comes to replacing the pads, the same good habits apply to both the front and rear. By now, I’m sure we’re all aware of the risk involved with simply pushing contaminated brake fluid backward through the ABS system.
The risk of creating blockages in the ABS modulator is just too great to overlook. There’s really no reason not to open the bleeders and slowly retract the pistons, catching the bad fluid in your bleeder bottle. You’re going to bleed and flush the system as part of the service anyway, so you might as well get rid of the most abused fluid from the start.
PAD REMOVAL
As the pads are being removed, it’s important to look for anything that isn’t moving freely. As mentioned earlier, we’re also looking for pads that are worn evenly, otherwise the workload isn’t being distributed evenly at best, and there’s a good chance the pads are hanging up and putting the dreaded heat into the rotors. It’s not unusual for the customer not to notice these problems since they tend to come on gradually. But all of them can feel the difference once the system is restored to its original condition.
The system inspection continues as we start to replace pads. Open the bleeder and push back the pistons on the calipers. On the front, we use a C-clamp between the outer pad and the back of the caliper.
If the slides are frozen, it will become evident when the caliper is removed. On some older models, the slides are part of the bolts, while on others, the caliper bolts go into the slide. Either way, they should be removed, cleaned and lubricated. Be sure to check the condition of the rubber boots that protect the sliders from the elements.
If you’re working on a model where the boot is located on the inside diameter of the caliper bracket, carefully remove the boot to clean the rust off the housing and the boot to re-establish the proper clearance. Newer Civics use a seal on the slider part of the bolt that is much more effective and easier to service. Now with the caliper removed, the piston should easily return to the bottom of the bore; if not, a rebuild is certainly in order.
Be careful when turning the piston so that the boot isn’t torn. If the boot feels brittle, or is already torn, it’s a good indication that overheating has taken place. Being equipped to handle both mechanical and hydraulic application, the rear calipers are twice as likely to have a problem.
The last place to look will be the most obvious — the pads themselves being stuck in the bracket. Like the boots that tighten up by the buildup of rust behind them, remove the plated anti-rattle clips from the bracket and clean up the bracket where they sit. The final step is to use a high-quality lube on the slider hardware as well as any areas that make metal-to-metal contact, particularly where the pads mount into the bracket.
TIME-SAVING CALIPERS
The good news is there is a profitable alternative to the extra time required to restore the performance of a caliper assembly. The availability of affordable loaded or friction-ready calipers for all popular applications often make these a better choice for both you and the customer. The customer gets his/her car back, the shop can stay on schedule and you have the piece of mind of installing a quality part with the protection of a warranty for both you and your customer.
The question of loaded versus friction-ready goes to the shop’s policy and preferences. While loaded calipers can offer a good value, you want to be sure they include a pad you’re comfortable installing on the car. And, in some cases, like when only the caliper needs to be replaced (although I prefer to replace them in pairs), friction-ready units might be the best choice.
With any type of rotor, it’s critically important that the hub surface where the rotor mounts is clean and free of rust; the rotor should slide onto the hub. If it doesn’t, find out why (don’t pull the rotor home with the bolts).
Like the lug nuts, the rotor bolts should be clean, lightly lubed and tightened evenly to the torque spec. With knock-off-style rotors, don’t overlook the outside diameter of the hub. It’s commonplace to find rust buildup that gets disturbed when the rotor is removed. In some cases, it will prevent the new rotor from sliding home. Either way, a few minutes spent removing the rust now is better than having the car kickback with a noise complaint or, worse yet, a damaged ABS sensor.
OTHER PROBLEMS
When faced with the complaint of poor braking performance, ask the customer if the pedal remains hard and solid, or does it fade to the floor? If fading is the problem, suspect that the master cylinder is leaking internally. You can usually duplicate the condition by lightly working the brakes while driving downhill. If the pedal is hard and firm, suspect the calipers or stuck pads.
There have been some issues with the boosters leaking vacuum, which can be confirmed with some investigation with your stethoscope or even a smoke machine.
Pedals with excessive stroke that don’t stop well will often go back to what we talked about earlier. If only one of the slider pins is seized, or the pads are flexing in the bracket, the boost-assisted hydraulic system will have no problems forcing things to move. A quick check for this problem is similar to the booster test. With the engine off, stroke the brake pedal to dump the vacuum. If the pedal feels good without boost, but you’re able to get excessive stroke with boost, suspect excessive movement somewhere. You could clamp the brake hoses to pinpoint the corner, but why take the chance? You have to take it apart anyway, and if one corner needs to be serviced, you might as well check them all.
