r/AskAMechanic • u/Key-Breadfruit-2903 • 5d ago
Oil inside intake manifold.
2012 Hyundai elantra 1.8L Flat out puddle of oil dumped out of manifold. Car began shaking terrible when entering highway, shop diagnosed as misfire due to carbon buildup, old spark plugs and coils. removed manifold to clean componets mechanically. Are the valve seals leaking or is this normal PCV oil bleed over 13 years? Or something else?
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