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Autopapyrus · Datsun on-DO 1.6 VAZ-11186 (2014)
https://autopapyrus.com/guides/datsun/on-do/timing-belt-replacement/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.

Datsun on-DO 1.6 VAZ-11186 (2014): Timing Belt Replacement

The VAZ-11186 is an 8-valve engine with a belt-driven valvetrain. The belt replacement interval is every 75,000 km or 60 months. A broken belt causes the pistons to hit the valves and leads to expensive repairs, so sticking to the interval is critical. When replacing the belt, it is strongly recommended to replace the tensioner roller as well to avoid having to disassemble everything again.

Difficulty: Medium Time: 1-2 hours Steps: 14 Tools: 15 mm and 17 mm box-end wrenches, 8/10/13 mm sockets, 5 mm hex key, tensioner roller turning tool or snap ring pliers, torque wrench, jack, lug wrench.

Parts

2
  • 🔩 Timing belt 21116-1006040 (original AvtoVAZ) or Gates 5521XS
  • 🔩 tensioner roller 21116-1006220 (recommended to replace together with the belt)

Step by step

14 steps
  1. Park the car on level ground and secure it with the parking brake. Disconnect the negative battery terminal.
  2. Raise the right front wheel with a jack and remove the wheel. Remove the engine splash shield (2 bolts under the wheel arch).
  3. Remove the upper front timing belt cover (secured with 8 mm and 10 mm bolts).
  4. Turn the crankshaft clockwise by the pulley bolt (17 mm wrench) until the mark on the camshaft pulley lines up with the projection on the rear timing cover. This is top dead center (TDC) of cylinder 1.
  5. Loosen the tensioner roller nut with a 15 mm box-end wrench. Turn the roller clockwise (to release belt tension) and hold it in that position.
  6. Remove the old timing belt from the crankshaft pulley, the camshaft pulley and the tensioner roller.
  7. Check the condition of the tensioner roller. Rock it by hand to check for play, and spin it to check for binding or bearing noise. If you find any defects, replace the roller (remove the mounting nut, take the roller off the stud and install a new one).
  8. Fit the new timing belt onto the crankshaft pulley first, then onto the camshaft pulley and the roller, without disturbing the set marks.
  9. Turn the tensioner roller counterclockwise until the notch on the outer disc of the roller lines up with the rectangular projection on its inner hub. This is the working position of the tensioner.
  10. Tighten the tensioner roller nut to 34-41 N·m (25-30 lb-ft), or by hand with firm effort if you don't have a torque wrench.
  11. Turn the crankshaft 2 full revolutions clockwise and check the marks again. The mark on the camshaft pulley must line up with the projection on the rear cover. If the marks don't line up, reinstall the belt starting from step 8.
  12. Verify the belt tension. When you press on the belt with a finger between the pulleys, the deflection should be 5-7 mm.
  13. Install the upper timing belt cover, the splash shield and the wheel. Reconnect the battery terminal.
  14. Start the engine and listen to the timing drive for any unusual noises.

Common mistakes and warnings

  • After the timing belt is removed, DO NOT turn the crankshaft or camshaft separately. The pistons may hit the open valves and bend them. When replacing the belt, it is absolutely essential to keep the TDC marks aligned. It is recommended to replace the roller at the same time and to check the condition of the water pump, so you don't have to repeat the disassembly a few thousand kilometers later.
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