Content/ topic1 Replace exhaust manifold gasket
Content/ topic1 Replace exhaust manifold gasketExhaust Manifold Servicing As mentioned, the manifold itself rarely causes any problems. On occasion, an exhaust manifold will warp because of excess heat. A straightedge and feeler gauge can be used to check the machined surface of the manifold. Another problem also the result of high temperatures generated by the engine—is a cracked manifold.
This usually occurs after the car passes through a large puddle and cold water splashes on the manifold’s hot surface. If the manifold is warped beyond manufacturer’s specifications or is cracked, it must be replaced.
Step 1: Let Engine Cool Off
Before you do anything to the exhaust manifold, let your engine cool down
Step 2: Remove Manifold Bolts
Spray down the manifold bolts with some penetrating oil. Because they are subjected to high heat, they will essentially weld themselves to the manifold. The oil will help you break that bond with your wrench. Use socket wrench, with an extension if you have it, to take off the bolts. Be careful not to break off the bolts as you remove them
Step 3: Scrape Old Gasket Off
The old gasket will be sealed onto the metal parts of the manifold and the cover itself. A small putty knife will help to scrape off the old gasket. Make sure you get all of it as anything left behind will cause the manifold to leak
Step 4: Set New Gasket
Place the new gasket in place on the manifold and replace the cover. Use a set of new bolts to tighten the manifold cover down. A torque wrench will keep you from overtightening the bolts and causing it to warp or crack