I took apart the plenum from the intake on my 98 Expedition 5.4 4x4.
The plenum appears to have a little oil lining the bottom of the plastic plenum. There was also oil around the plenum gasket and on the bottom of the intake manifold surface.
Is this normal?
The plenum appears to have a little oil lining the bottom of the plastic plenum. There was also oil around the plenum gasket and on the bottom of the intake manifold surface.
Is this normal?
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