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How to Change the Valve Cover Gaskets on a Jaguar 4.0

The valve cover gaskets cover the internal working parts of the upper part of the Jaguar 4.0 engine. This top section of the engine is called the "head." Underneath the valve cover are cams, valve springs, valves and an assortment of other small parts that all work in concert to make the engine run smoothly. When oil starts leaking at the valve cover to head seal, you'll need to replace the valve cover gasket.



Difficulty: Moderately ChallengingInstructionsThings You'll Need:
  • Razor blade
  • RTV sealant
  • New gasket
  • Socket wrench
  • Socket set
  • Engine degreaser
  • Shop rag
  1. Step 1

    Remove the valve cover to engine head retaining nuts. These nuts are located around the perimeter of the valve cover.

  2. Step 2

    Pull the valve cover off the head of the engine.

  3. Step 3

    Remove all of the old gasket material from both the head and valve cover mating surfaces with a razor blade.

  4. Step 4

    Clean the mating surfaces with engine degreaser and a shop rag.

  5. Step 5

    Apply RTV sealant to the mating surfaces.

  6. Step 6

    Set the gasket on top of the engine head. Make sure the gasket is oriented properly. It will only fit one way.

  7. Step 7

    Press the valve cover to the engine head and tighten all valve cover retaining nuts.

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