1. Aging/Brittle Gaskets: If the valve cover gasket is old and beginning to show signs of material degradation (such as brittleness or cracking), it could benefit from the added assurance of sealant. Sealant can help reinforce and enhance the sealing capabilities of a weaker gasket.
2. Uneven or Damaged Surfaces: If there are noticeable irregularities in the sealing surfaces of either the valve cover or cylinder head, a thin layer of sealant applied to the gasket can act as a compensation measure, ensuring a better seal when the components come together.
3. Difficult Areas: Some valve covers might feature intricate designs or unique shapes, leading to sections or corners that are harder to reach or compress effectively. In such instances, a modest amount of sealant can be used in those specific regions to help fill any gaps and improve sealing.
4. Excessive Oil Consumption: If the gasket currently in use doesn't fully resolve excessive oil consumption even though it is still good condition, adding sealant to certain spots might aid in reducing oil leaks if other issues can be ruled out.
Remember that applying too much sealant can create problems by interfering with the proper fit and function of engine components, so it's important to be conservative when using it. Whenever in doubt, refer to the manufacturer's instructions or recommendations for the vehicle in question.
