Brake drums on ล koda Octavia Tour - a unit that sooner or later requires attention: be it replacing pads, grooving the surface, or complete dismantling due to wear. Unlike disc brakes, the drum system is more closed, making parts more difficult to access. Many owners are faced with the problem of the drum โstickingโ to the hub, especially after long-term use or corrosion. This article will help you figure out how to properly remove a brake drum on a Octavia Tour (including models 1U (1996โ2004), 1Z (2004โ2013) and A7 (2013โpresent)), avoiding typical errors and damage.
It is important to note that the procedure is different for rear drums with ABS and without it, as well as for cars with electromechanical parking brake (EPB). We will look at the universal algorithm, and also point out the key differences between different generations. If you have never worked on the brake system, it is better to enlist the help of an experienced mechanic - mistakes here can cost your safety.
Preparing for work: tools and safety precautions
Before you begin dismantling, make sure you have everything you need. On models Octavia Tour Since 2013 (A7), drums can be attached to the hub via guide pins - these can easily be broken if the wrong tool is used. Here's the basic set:
- ๐ง Socket set and ratchet wrench (dimensions
13 mm,15 mm,17 mm) - ๐จ Hammer with rubber or polyurethane head
- ๐ฉ Brake drum puller (or two-legged puller)
- ๐งฒ Magnet for fastening (to avoid losing springs and cotter pins)
- ๐ WD-40 or similar penetrating compound (such as Liqui Moly Rostloser)
- ๐ฉน Gloves and safety glasses (metal shavings and dust from pads are dangerous)
Also prepare the car:
- Place the machine on a level surface and secure the front wheels with chocks.
- Loosen the rear wheel nuts before lifting on the jack.
- Raise the rear end on a jack and remove the wheel.
- Clean the drum and hub from dirt with a wire brush.
โ ๏ธ Attention: Under no circumstances use the jack as the only support - be sure to place safety stands under the threshold. On Octavia Tour with independent rear suspension (multi-lever) the center of gravity is shifted and the vehicle may slip.
- Complete set of heads
- Basic keys only
- Drum puller
- None of the above
Removing the brake drum: step-by-step algorithm
The dismantling process depends on got attached drum to the hub or not. If it rotates freely, the task is simplified. Let's consider both scenarios.
Scenario 1: Drum rotates freely
This is an ideal case that occurs on new or regularly serviced vehicles. Proceed like this:
- Remove the hub protective cap (if equipped) with a flat-head screwdriver.
- Unscrew the guide pins (usually 2 pieces) with the head on
13 mmor15 mm. - Carefully remove the drum from the hub by rocking it from side to side.
If the drum does not budge, do not apply excessive force - it is better to move on to scenario 2.
Scenario 2: The drum is stuck or jammed
This is a typical situation for Octavia Tour older than 5โ7 years, especially if the car was operated in high humidity conditions. Here you will need a puller and patience.
- ๐ง Apply WD-40 to the joint between the drum and hub, wait 10-15 minutes.
- ๐จ Lightly tap the edge of the drum with a rubber mallet to try to move it.
- ๐ Install the puller: place one end against the hub, the other against the edge of the drum. Tighten the puller screw gradually, without jerking.
- ๐ฉ If there is no puller, you can use two M8 bolts, screwing them into the threaded holes of the drum (if any) until they stop.
โ ๏ธ Attention: On models Octavia Tour A7 with EPB (electromechanical parking brake) before removing the drum it is necessary disable rear calipers via a diagnostic scanner (for example, VCDS or OBDeleven). Otherwise, the brake pads will block removal.
Loosen the wheel nuts|Raise the car and secure it|Clean the drum from dirt|Apply penetrating lubricant|Prepare a puller or alternative tool-->
Typical problems and how to avoid them
Even with careful work, you can encounter difficulties. Here are the most common of them and ways to solve them:
| Problem | Reason | Solution |
|---|---|---|
| The drum cannot be removed despite the puller | Corrosion on the seat or deformation of the edges | Use a hammer with a copper tip, heat the drum with a hair dryer (not higher than 100ยฐC) |
| There is a metallic grinding noise when rotating | Pad wear down to metal or bearing failure | Replace pads and check wheel bearing |
| After removal the drum cracked | Excessive removal force or overheating | Only drum replacement, check the geometry of the new one before installation |
| The parking brake is not adjustable | Cable wear or mechanism jamming | Check the cable tension, lubricate the guides |
Pay special attention to the condition wheel bearing. If a hum or play is heard when the drum rotates, the bearing requires replacement. On Octavia Tour 1Z (2004โ2013) the bearing is often assembled with the hub, which simplifies replacement, but increases the cost.
If the drum still won't come off, try the hot-cold method: warm the drum with a hairdryer (without overheating!), then spray the hub with cold water. The metal will shrink and the part will move out of place.
Features for different generations of Octavia Tour
Brake drum design Octavia Tour has evolved. Let's look at the key differences:
Octavia Tour 1U (1996โ2004)
The simplest generation: the drums are mounted on two pins, and the parking brake is mechanical. The main problem is pin corrosion, which often break when unscrewed. If the pin breaks off, it will have to be drilled out.
Octavia Tour 1Z (2004โ2013)
Drums appeared here built-in ABS sensors. When dismantling, it is important not to damage the sensor wiring. Also on some modifications the drum is fixed central nut (key to 30 mm), which is easy to miss.
Octavia Tour A7 (2013โpresent)
The most technologically advanced generation: many trim levels are equipped EPB (electromechanical parking brake). Here, before removing the drum, you must:
- Connect the diagnostic scanner.
- Place the caliper in maintenance mode (
Service Mode). - Release the cable tension through the electronic unit.
What to do if there is no scanner for EPB?
On some models Octavia A7 You can manually release the parking brake by removing the plastic cover on the caliper and turning the mechanism with a screwdriver. However, this is risky - it is better to contact the service.
Installing a new drum: nuances and adjustments
After removing the old drum, inspect the hub for corrosion or damage. The new drum should fit tightly, without distortion. Before installation:
- ๐งด Clean the hub seat from rust.
- ๐ง Check status brake pads - if their thickness is less
1.5 mm, replace. - ๐ Apply to the joint between the drum and the hub. copper grease (for example, Molykote Cu-7439), but avoid contact with the work surface.
- ๐ฉ Tighten the mounting pins to a torque
25โ30 Nm(for Octavia A7 โ45 Nmfor the central nut).
After installation, be sure to:
- Press the brake pedal several times until the pads are in working position.
- Adjust the parking brake (for mechanical - tighten the cable, for EPB - through the scanner).
- Check that the drum does not run out when rotating (permissible runout is no more than
0.1 mm).
โ ๏ธ Attention: On Octavia Tour 1Z after replacing the drums the light may come on ABS. This is due to a change in the gap between the sensor and the ring gear. Solved by resetting errors through the diagnostic connector.
After replacing the drums, avoid sudden braking for the first 200โ300 km - the pads need to get used to the new surface.
When is it time to change brake drums?
The manufacturer does not set strict replacement deadlines, but there are signs indicating wear:
- ๐ Vibration or knocking when braking (especially at speed
60โ80 km/h). - ๐ Grinding or squealing noise from the rear wheels.
- ๐ Increased brake pedal travel.
- ๐ฅ Overheating of the rear wheels after a trip (the drum is hot to the touch).
- ๐ Visible cracks or deep grooves in the work surface.
On Octavia Tour with mileage over 150,000 km drums often wear unevenly, resulting in ellipse (oval shape). You can check this with a caliper: the difference in diameter at different points should not exceed 0.05 mm.
If you find at least one of these signs, you cannot delay replacement - worn drums increase the braking distance and the risk of wheel jams.
FAQ: Frequently asked questions about Octavia Tour brake drums
Is it possible to sharpen the drums instead of replacing them?
Yes, but only if their thickness after grooving does not become less than the permissible minimum (indicated on the drum itself or in the manual). For Octavia Tour 1U/1Z minimum thickness - 7.5 mm, for A7 โ 8.0 mm. Grooving is possible only in the absence of cracks and deep corrosion.
How often should the condition of the drums be checked?
It is recommended to inspect the drums every 60,000 km or when replacing rear pads. On vehicles with EPB It is better to carry out diagnostics more often - every 40,000 km, since the electromechanical brake creates additional load.
What to do if after replacing the drums the brakes become โwobblyโ?
This is due to the need lapping pads. In the first 100โ200 km, braking efficiency may be reduced. If the problem persists, check:
- Correct installation of the pads (right/left sides are not mixed up).
- Lack of air in the brake system (may require pumping).
- Condition of the brake cylinders (are they leaking).
Is it possible to drive with a cracked drum?
Absolutely not! The crack leads to drum destruction on the movewhich may block the wheel or damage the hub. Even microcracks are a reason for immediate replacement.
Which brand of drums should I choose for replacement?
For Octavia Tour original parts recommended (VAG with article number 1K0 609 615 for 1Z or 5Q0 609 615 for A7) or high-quality analogues:
- TRW (article
GDB1448) - ATE (article
24.0120-0117.2) - Brembo (article
09.6464.11)
Budget options you can consider Febi or Meyle, but their resource is lower.