Turbocharger Leak Test

Turbocharger Leak Test
Check for loose connections or damage to air intake hoses and tubes.

Air leaks at the compressor manifold, intake manifold hoses or intake manifold covers can cause excessive smoke, loss of engine power or a noise condition.

Exhaust leaks at the exhaust manifolds or in the turbine housing will also cause loss of engine power and a noise condition.

Inspect turbocharger and components for loose connections or damage. Using a liquid soap on hose or tube connections will aid in leak detection. Using regular shop air, the air induction system can be pressurized to check for leaks. Disconnect the Manifold Absolute Pressure (MAP) sensor hose from the MAP sensor. Install a regulator valve into the MAP sensor hose. Disconnect the compressor manifold at the turbocharger. Install a plastic cap and clamp on the compressor manifold. Pressurize the air induction system to 15 psi. Check the air induction system for leaks.

Exhaust leaks can usually be detected audibly or visually by a discoloration caused by escaping hot exhaust gases.