Q: How to replace the exhaust crossover exhaust pipe on Buick LaCrosse?
A: Anyway to replace the exhaust crossover pipe begins by taking off the fuel injector sight shield and air cleaner intake duct. The first step of replacement begins with removing exhaust crossover heat shield nuts followed by the heat shield. First disconnect all exhaust crossover pipe studs and bolts before removing the exhaust crossover pipe and its seal. Placing the exhaust crossover pipe seal on the exhaust crossover pipe at the right exhaust manifold connection should be the first step before installing the exhaust crossover pipe. Attach the exhaust crossover pipe studs and bolts while tightening them to 20 nm (15 ft. Lbs.). The exhaust crossover heat shield needs to be reinstalled followed by securing it with heat shield nuts which must be tightened to 25 nm (18 ft. Lbs.). To finish the installation process you should replace the air cleaner intake duct along with the fuel injector sight shield.
Q: How to service the exhaust pipe on Buick LeSabre?
A: Service of the Exhaust Pipe starts with vehicle lifting and suspension. Prior to shifting a flex coupling out of its standard placement position, the flex coupling and pipe assembly require support to prevent excessive flexing because the flex coupling allows a maximum of six degrees flex but this leads to pipes moving only up to 1 inch per foot of pipe length thus the end of a 3-foot pipe would move no more than 3 inches. Start by removing the two Exhaust Manifold nuts and proceeding to unscrew the Catalytic Converter four nuts followed by uninstalling the exhaust downpipe. The first step for installation requires placing the downpipe against the manifold gasket before positioning the frontpipe onto the manifold studs with full adherence to fastener notice service precautions. Mount four Catalytic Converter nuts while tightening them to 25 nm (18 ft. Lbs.) and secure two Exhaust Manifold studs nuts with the same torque value. Finally, lower the vehicle.
Q: How to replace the exhaust pipe crossover on Buick Regal?
A: The exhaust crossover replacement starts by unplugging the fuel injector sight shield followed by gentle detachment of the throttle body air inlet duct while removing the air cleaner assembly. Start by removing each heat shield nut from the exhaust crossover followed by the heat shield and then proceed to uninstall the crossover pipe bolts and finally the pipe. When replacing the exhaust crossover pipe also remove its associated seal. Start by applying the exhaust crossover pipe seal onto the exhaust crossover pipe that connects to the right exhaust manifold before installing the pipe. Insert the exhaust crossover heat shield then secure its nuts to 20 nm (15 ft. Lbs.) before tightening the exhaust crossover pipe bolts to 18 nm (13 ft. Lbs.). You should put the throttle body air inlet duct back and then reinstall the air cleaner assembly after which you should mount the fuel injector sight shield.