The first step is a thorough cleaning of the engine bay using a degreaser. Over time, the thermal cycling causes the metal manifolds to expand and contract, stressing the return line fittings.
How to Stop an Oil Leak on Your Evo 8 Exhaust Manifold
If the oil is dripping from the seam or the visible surface of the manifold, the issue is likely the gasket. While oil leaks are common across many vehicles, the location at the turbo outlet where the exhaust manifold meets the cylinder head creates a diagnostic challenge.
Inspect the seam where the manifold meets the head for any signs of wetness. Many owners mistake a leak from the manifold for a problem with the head gasket or valve cover, leading to unnecessary repairs.
How to Stop Oil Leak from Exhaust Manifold Evo 8
Switching to a heavier viscosity, such as a 10W-40, can sometimes help maintain film strength at elevated temperatures. Check the oil return line fittings where they enter the manifold.
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