Repairing a transmission cooler on a BMW 650i F12 LCI Convertible requires a basic understanding of automotive systems and some mechanical skills. click here for more details on the download manual…..
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Here’s a step-by-step guide to help you through the process. Please remember that if you’re not comfortable with any step, it’s always best to consult a professional mechanic.
### Tools and Materials You’ll Need:
– Basic hand tools (wrenches, sockets, screwdrivers)
– Torque wrench
– Pliers
– Clean rags
– Transmission fluid (as specified for your BMW)
– Replacement transmission cooler (if needed)
– Gaskets or seals (if applicable)
– Drain pan (to catch fluid)
### Safety Precautions:
1. **Work in a well-ventilated area**.
2. **Wear safety glasses** and gloves to protect yourself from fluids and sharp edges.
3. **Disconnect the battery** to avoid any electrical issues.
### Step-by-Step Guide:
#### 1. **Prepare the Vehicle**
– Park the car on a level surface and engage the parking brake.
– Disconnect the battery by removing the negative terminal.
#### 2. **Lift the Car**
– Use a jack to lift the front of the car and secure it with jack stands. This provides easier access to the transmission cooler.
#### 3. **Locate the Transmission Cooler**
– The transmission cooler is usually located in front of the radiator. Look for a small, flat radiator-like unit with lines running to and from it.
#### 4. **Drain the Transmission Fluid**
– Place a drain pan under the transmission pan.
– Remove the drain plug (if your model has one) or carefully loosen the transmission pan bolts to let the fluid drain out. Be sure to keep the drain pan positioned to catch any fluid.
#### 5. **Disconnect the cooler Lines**
– Identify the transmission cooler lines connecting the cooler to the transmission. These are usually metal or rubber hoses.
– Use pliers or a wrench to loosen the clamps and disconnect the lines. Be prepared for some fluid to spill, so keep your drain pan handy.
#### 6. **Remove the Cooler**
– If you’re replacing the cooler, remove any bolts or brackets holding it in place. Carefully pull the cooler out from its mounting position.
#### 7. **Install the New cooler (if necessary)**
– If you are replacing the cooler, align the new cooler in the same position as the old one and secure it with the bolts or brackets you removed earlier.
#### 8. **Reconnect the cooler Lines**
– Reattach the cooler lines to the new or repaired cooler. Ensure that they are secured tightly to prevent leaks.
#### 9. **Refill the Transmission Fluid**
– After reconnecting everything, it’s time to refill the transmission fluid. Refer to your owner’s manual for the correct type
and amount of fluid needed.
– Use a funnel to pour the new transmission fluid into the transmission dipstick tube.
#### 10. **Check for Leaks**
– Reconnect the battery and start the vehicle. Let it run for a few minutes and check for any leaks around the cooler and connections.
– If you see leaks, you may need to tighten connections or check for damage.
#### 11. **Dispose of Old Fluid**
– Make sure to dispose of the old transmission fluid properly. Many auto parts stores will accept used fluids for recycling.
### Conclusion
This process requires patience and attention to detail. If at any point you feel unsure, don’t hesitate to reach out to a professional mechanic for assistance. Proper maintenance of your transmission cooler is essential for the longevity and performance of your BMW 650i.
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