Monday, March 3, 2014
Do I Need Sealant on an Exhaust Manifold
The exhaust manifold connects directly to an engines cylinder ports and routes chemical-laden exhaust gases out toward the tailpipe. The seal between exhaust manifold and cylinder ports must be airtight for safety and emission reasons. You may use sealant along with a gasket.
Function
The exhaust manifold plays an important role in engine performance and longevity. Combustion within the engine cylinders creates waste gases expelled through the exhaust system, which begins at the exhaust manifold. You must maintain an airtight seal between cylinder ports and manifold.
Applying Sealant
Every professionally installed exhaust manifold and cylinder head have a gasket compressed between them. Age and engine heat wear gaskets down, reducing the quality of seal between the two components. Though sealant adds seal protection, new gasket installation does not require it.
Safety
A leaking seal or cracked exhaust manifold allows harmful exhaust gases such as carbon monoxide into the vehicle cabin. Carbon monoxide impairs motor functions and in large doses can cause death.
