In vehicles made in 2014 and prior years, the exhaust manifold attaches to the back of the
Cylinder Head, while vehicles from 2015 on use a front attachment. To remove the exhaust manifold, first lift your car with jackstands and keep it secure. Before working on the exhaust, untie the pipe from its junction with the manifold. Depending on your model, you may need to take down the entire exhaust to create enough room to work. Rake off the bolts and shield attaching the exhaust manifold heat shield, and unbolt the manifold brace. Pull the oxygen sensor's electrical plug and take the sensor off the exhaust manifold. To remove the exhaust manifold and its current gasket, unscrew all bolts from the three main positions - left, center, and right sides. Check the exhaust manifold for cracks and repairs that need to be made, and change it if needed. Cough any dirt off the threads of exhaust manifold bolts using a wire brush, then check them for damage and replace any broken ones. Scrape off any old gasket material from both surfaces with care, but don't grind into or mar them, as leaks can happen later. Check both surfaces - exhaust manifold and cylinder head - for alignment while holding a straight-running board against them. Gauge the gap with a feeler tool. When the surface steps out of position by too much, switch to either a replacement exhaust manifold or resurface the current one. Before putting the exhaust manifold on, place a fresh gasket without applying any sealer material. Attach the exhaust manifold, and slowly tighten the bolts, working our from the center first to the designated torque. The next parts go in the opposite order they came out.