Download BMW 535 535i 1988 1989 1990 1991 Workshop Service Manual –

Replacing the timing belt on a BMW 535i is a complex process that requires careful attention to detail. click here for more details on the download manual…..

Here’s a detailed guide with bullet points to help you through the process:

### Tools and Equipment Needed
– **Socket Set**: A complete metric socket set (including deep sockets) for various bolts and nuts.
– **Torque Wrench**: To ensure bolts are tightened to the manufacturer’s specifications.
– **Ratchet and Extension Bars**: For better access to tight spaces.
– **Pliers**: For removing clips and clamps.
– **Screwdrivers**: Flathead and Phillips for various fasteners.
– **Impact Wrench**: Optional, but can speed up the removal of stubborn bolts.
– **Jack and Jack Stands**: To safely lift and secure the vehicle.
– **Engine Support Bar**: To support the engine while removing the front timing cover.
– **Timing Tools**: Specific tools for aligning the timing marks on the engine.
– **Belt replacement Kit**: Includes the new timing belt and any associated pulleys or tensioners.
– **Gasket Scraper**: For removing old gaskets from the engine surfaces.
– **Clean Rags**: For cleaning surfaces and wiping off excess oil or debris.
– **Engine Oil**: To lubricate new parts during installation.

### Preparation
– **Disconnect the Battery**: Always disconnect the negative terminal to avoid electrical shorts.
– **Remove Engine Covers**: Take off any plastic engine covers to gain access to the timing belt.
– **Drain Coolant**: If necessary, drain the engine coolant to avoid spills when removing components.

### Accessing the Timing Belt
– **Remove Front Accessories**: This may include the alternator, power steering pump, or other belt-driven accessories.
– **Remove the Crankshaft Pulley**: Use an impact wrench to remove the crankshaft bolt; this can be very tight.
– **Remove Harmonic Balancer**: Carefully pull it off to access the timing cover.

### Timing Cover Removal
– **Unbolt the Timing Cover**: remove all bolts securing the timing cover using the socket set.
– **Gasket Removal**: Use the gasket scraper to remove the old gasket from the engine block and timing cover.

### Timing Belt Removal
– **Align Timing Marks**: Use timing tools to ensure the engine is at top dead center (TDC) and the timing marks are aligned.
– **Loosen Tensioner**: Follow the manufacturer’s instructions to release tension on the timing belt.
– **Remove Old Timing Belt**: Carefully slide the old timing belt off the pulleys, making sure to remember the routing.

### Installing the New Timing Belt
– **Install New Tensioner and Pulleys**: If included in your kit, install new tensioners and pulleys as needed.
– **Route New Timing Belt**: Follow the specific routing diagram for your BMW model, ensuring the belt is properly seated on all pulleys.
– **Adjust Tension**: Using a torque wrench, set the tension on the timing belt according to the manufacturer’s specifications.

### Reassembling Components
– **Replace Timing Cover**: Clean download BMW 535 535i workshop manual and install a new gasket on the timing cover, then reattach it and torque the bolts.
– **Reinstall Harmonic Balancer and Crankshaft Pulley**: Ensure they are properly aligned and torqued to specifications.
– **Reattach Front Accessories**: Reinstall any components that were removed earlier, ensuring they are securely fastened.
– **Refill Coolant**: If coolant was drained, refill the system with fresh coolant.

### Final Steps
– **Reconnect the Battery**: Reattach the negative terminal.
– **Start the Engine**: Turn on the engine and listen for any unusual noises. Check for leaks around the timing cover.
– **Test Drive**: Take the car for a short test drive and monitor its performance and any warning lights.

### Safety Precautions
– **Wear Safety Gear**: Always wear gloves and safety glasses when working on the vehicle.
– **Follow Manufacturer’s Specs**: consult the vehicle’s service manual for specific torque settings and additional details.
– **Be Cautious with Tools**: Handle tools carefully, especially when working in tight spaces.

This guide provides a comprehensive overview for replacing the timing belt on a BMW 535i. Ensure you have all necessary parts and tools before starting, and don’t hesitate to consult a professional if you feel uncertain about any step in the process.
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