How to replace the timing belt, water pump & rollers on the Volvo 850, S70, V70, etc. Pt 1-2 - VOTD

Step-by-Step Tutorial: Replacing the Timing Belt, Water Pump, and Rollers on a Volvo 850, S70, V70, etc.

Part 1: Preparing for the Job

1. Check for Leaks: Before starting the timing belt replacement, check for any leaks in the system.

2. Gather Necessary Tools:

   • Half-inch breaker bar with extensions
   • 30mm socket
   • Torque bits (T45, T25, T30)
   • 12mm and 10mm ratchets (3/8 inch and quarter-inch)
   • Crescent wrench
   • Magnet
   • Serpentine belt tool
   • Special tool for tensioner
   • Screw for holding tensioner
   • 18 or 19mm box end wrench
   • T25 and T30 torque hand screwdriver

3. Prepare the Vehicle:

   • Place a piece of wood under the wheel on the opposite side where you'll jack up the car.
   • Set the parking brake.
   • Jack up the car slowly and place it on safety stands.

Part 2: Accessing and Removing Components

4. Accessing Engine Components:

   • Open the hood and secure it at a higher angle for better access by flipping the tabs on both sides.
   • Remove the coolant bottle by releasing the latch and disconnecting the wire connection at the bottom.

5. Removing Serpentine Belt:

   • Use the serpentine belt tool to release tension on the belt.
   • Note the belt routing before removing it.
   • Take out the idler pulley by removing the two 12mm bolts.

6. Removing Timing Belt Cover:

   • Remove the top timing belt cover by loosening the bolt and lifting it off.
   • Check for any coolant leaks inside.

7. Aligning Timing Marks:

   • Locate the timing marks on the cams and crankshaft.
   • Use a 30mm socket to turn the crankshaft clockwise to align the marks.

8. Inspecting Other Components:

   • Check suspension parts, brake lines, boots, control arms, and brake pads for wear and damage.

Part 3: Removing Timing Belt and Components

9. Removing Hydraulic Tensioner:

   • Release tension on the belt by loosening the tensioner bolt.
   • Remove the tensioner and bolts.

10. Removing Dampener Cover:

    • Remove the 10mm bolts covering the bottom of the timing belt and dampener.
    • Pull down the cover to access the timing belt.

11. Removing Timing Belt:

    • Gently pull the timing belt out from under the camshaft.
    • Be cautious while removing the tensioner roller.

12. Replacing Water Pump:

    • Drain the radiator and block.
    • Remove bolts on the water pump and replace it, ensuring a clean surface and proper gasket placement.

13. Final Steps:

    • Torque down the water pump bolts in a star pattern.
    • Clean the area thoroughly to prevent future leaks.
    • Reassemble all components in reverse order.

Conclusion:

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