Popular Mechanics’s automotive experts outline the tools and techniques proven to smoke out even the toughest to find vacuum ...

Certain parts of an engine (for example, the exhaust manifold) can become hot enough to ignite errant oil. In fact, leaks that would sometimes result in oil ending up on the exhaust manifold ...

Then, depending on what tools you have access to: Visually inspect hoses, connections and the intake manifold ... top of the engine while it’s running, and when it identifies a leak, it will ...

Bolted directly to the engine block, the exhaust manifold ... have a separate manifold for each cylinder bank. A leak in the exhaust manifold or its gasket can allow exhaust gases to escape ...

If leaks develop in hoses or engine parts downstream from the air ... Vacuum leaks can develop in many locations, including the intake manifold, throttle body evaporative emissions system, power ...