BMW 520i 1988-1991 Service Rep

Repairing an exhaust manifold on a BMW 520i can be a complex task, but I’ll break it down into simple steps to help you understand the process. click here for more details on the download manual…..

Keep in mind that if you’re not comfortable with car repairs, it’s always best to consult a professional mechanic. Here’s a general guide:

### Tools and Materials Needed:
– Basic hand tools (wrenches, sockets, ratchet)
– torque wrench
– Screwdrivers
– Pliers
– Gasket scraper or razor blade
– New exhaust manifold gasket
– New exhaust manifold (if damaged)
– High-temperature anti-seize compound (optional)
– Shop manual for specific torque settings and procedures

### Step-by-Step Guide:

#### 1. **Safety First:**
– **Disconnect the Battery:** Start by disconnecting the negative terminal of the battery to prevent any electrical issues.
– **Let the Engine Cool:** make sure the engine is completely cool before you start working.

#### 2. **Raise the Vehicle:**
– Use a jack to lift the front of the car and secure it with jack stands. This will give you access to the underside of the engine.

#### 3. **Remove the Engine Cover:**
– If your BMW has an engine cover, you may need to remove it. Use the appropriate tools (usually a socket or wrench) to take off the bolts.

#### 4. **Locate the Exhaust Manifold:**
– The exhaust manifold is typically located on the side of the engine block. It collects exhaust gases from the engine and directs them to the exhaust system.

#### 5. **Remove components as Necessary:**
– Depending on the layout, you might need to remove various components like the air intake, heat shields, or other parts to access the manifold. Take photos or notes so you remember how to reassemble everything.

#### 6. **Disconnect the Exhaust Manifold:**
– **Unbolt the Manifold:** Use a socket wrench to remove the bolts that hold the manifold in place. Keep track of these bolts as you will need them for reinstallation.
– **Disconnect Exhaust Pipes:** If the manifold is connected to the exhaust pipes, you may need to unbolt these as well.
– **Remove the Manifold:** Carefully lift the manifold off the engine. If it’s stuck, gently wiggle it to free it.

#### 7. **Inspect and Clean:**
– Check the manifold and the engine surface for cracks or damage. If the manifold is damaged, it will need to be replaced.
– Use a gasket scraper or razor blade to clean the old gasket material off the surface where the manifold attaches to the engine.

#### 8. **Install the New Gasket:**
– Place a new exhaust manifold gasket onto the engine block. make sure it’s aligned properly.

#### 9. **Reinstall the Exhaust Manifold:**
– Carefully position the manifold onto the new gasket. make sure it fits snugly.
– **Bolt it Down:** Reinstall the bolts and tighten them to the manufacturer’s specifications using a torque wrench. If you don’t have a manual, tighten them in a crisscross pattern to ensure even pressure.

#### 10. **Reconnect Exhaust Pipes:**
– If you disconnected the exhaust pipes, reattach them download BMW 520i workshop manual and make sure they are secure.

#### 11. **Reassemble Other Components:**
– Reinstall any parts you removed earlier, ensuring everything is put back in its original position.

#### 12. **Reconnect the Battery:**
– Once everything is back in place, reconnect the negative terminal of the battery.

#### 13. **Start the Engine:**
– Start the engine and listen for any unusual noises. Check for exhaust leaks around the manifold area. If everything sounds good, you’re done!

### Final Tips:
– Always refer to the vehicle’s manual for specific instructions and torque specifications.
– Take your time and don’t rush. Proper installation is key to preventing future issues.
– If you encounter any problems or feel unsure at any step, it’s wise to consult with or hire a professional mechanic.

By following these steps, you should have a clearer understanding of how to repair an exhaust manifold on a BMW 520i. Good luck!
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Category: BMW 520i 1988-1991 Service Rep

Download BMW 520i 1988-1991 Service Repair Workshop Manual –