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- Lexus ISF Transmission Shift Speed Differences I briefly discuss the shift speed difference between manual mode and normal drive on the 2012 Lexus ISF.
- 2020 Toyota Supra VS 2008 Lexus IS F Both cars are 100% stock.
Here’s a detailed step-by-step guide on how to perform an exhaust manifold repair on a Lexus IS F. This guide includes the necessary tools and a thorough explanation of each step.
### Tools and Materials Needed
– **Socket Set**: A complete metric socket set, including deep sockets, is essential for removing and securing bolts.
– **Torque Wrench**: Ensures bolts are tightened to the manufacturer’s specifications.
– **Ratchet and Extensions**: To navigate tight spaces around the engine bay.
– **Pliers**: Useful for removing clamps and hoses.
– **Wrench Set**: A set of open-end and box-end wrenches for various bolt sizes.
– **Screwdrivers**: Both flat-head and Phillips-head for removing any covers or clamps.
– **Pry Bar**: To help manipulate the manifold if it’s stuck.
– **Gasket Scraper**: For removing old gasket material from the manifold and cylinder head.
– **Shop Towels/Rags**: To keep the workspace clean and to wipe excess oil or coolant.
– **Engine Degreaser**: For cleaning the manifold area before installation.
– **Replacement Gasket**: A high-quality gasket that matches the specifications for the Lexus IS F.
– **Exhaust Manifold (if damaged)**: Replacement parts if the manifold itself is cracked or damaged.
– **High-Temperature Silicone Sealant**: Optional, for additional sealing if necessary.
– **Safety Gear**: Gloves, safety glasses, and a dust mask to protect yourself while working.
### Repair Process
– **Preparation**:
– Ensure the vehicle is parked on a flat surface and the engine is cool.
– Disconnect the negative battery terminal to prevent any electrical issues.
– Raise the vehicle using jack stands if necessary for better access to the exhaust manifold.
– **Remove Engine Covers**:
– Use your socket set to remove any plastic engine covers that may obstruct access to the exhaust manifold.
– **Disconnect Exhaust Components**:
– Carefully disconnect any components connected to the exhaust system, such as the downpipe or exhaust pipes. Use the appropriate wrenches to avoid damaging bolts.
– **Remove Heat Shields**:
– If present, remove any heat shields protecting the manifold. This may require additional bolts or fasteners to be removed.
– **Disconnect Intake Components**:
– Depending on the layout, you may need to remove the intake manifold or other components to access the exhaust manifold effectively. Use your socket set and wrenches for this step.
– **Remove the Exhaust Manifold Bolts**:
– Use a ratchet and appropriate sockets to remove the bolts securing the exhaust manifold to the cylinder head. Keep track of the bolt locations and sizes for easier reinstallation.
– **Take Out the Exhaust Manifold**:
– Carefully pull the exhaust manifold away from the engine block. If it’s stuck, use a pry bar gently to free it without causing damage.
– **Inspect the Manifold**:
– Check the exhaust manifold for cracks, warping, or any signs of failure. If damaged, replace it with a new one.
– **Clean the Contact Surfaces**:
– Use a gasket scraper to remove the old gasket material from both the exhaust manifold and the cylinder head. Ensure the surfaces are clean and free of debris for a proper seal.
– **Install New Gasket**:
– Position the new exhaust manifold gasket onto the cylinder head, ensuring it aligns properly with the bolt holes.
– **Reinstall the Exhaust Manifold**:
– Carefully place the exhaust manifold back onto the cylinder head, ensuring it sits evenly on the gasket.
– **Secure the Exhaust Manifold**:
– 
Hand-tighten the bolts first, then use a torque wrench to tighten them to the manufacturer’s specifications, typically found in the service manual.
– **Reattach All Components**:
– Reverse the removal process for the intake components, heat shields, and exhaust parts. Make sure all connections are secure.
– **Check for Leaks**:
– Once everything is reassembled, reconnect the negative battery terminal and start the engine. Listen for any exhaust leaks and check for any signs of exhaust gases escaping.
– **Final Inspection**:
– After a test drive, recheck all connections and bolts to ensure everything is secure and functioning properly.
### Conclusion
Performing an exhaust manifold repair on a Lexus IS F requires careful attention to detail and the right tools. Always consult the vehicle’s service manual for specific torque settings and additional instructions. If you encounter any complications or feel unsure at any point, it’s advisable to seek the assistance of a professional mechanic.
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