Is this an expensive repair?
Documented on the 2012 Ford Mustang GT build
Published February 26, 2026
The typical parts (valve cover gasket/tube seals and spark plugs) are relatively inexpensive; labor for removing valve covers can make the job take a couple of hours.
Full Answer
The typical parts (valve cover gasket/tube seals and spark plugs) are relatively inexpensive; labor for removing valve covers can make the job take a couple of hours. Expect parts-only costs in the low hundreds and total cost including labor higher if done by a shop.
Documented In This Build
Related Knowledge
What causes oil to fill the spark plug wells?Can I drive the car if the plugs are covered in oil?Do I need to replace the ignition coils too?How long will the repair take?How do I know if the PCV grommet is bad?What torque should I use for the coil mounting bolt?How often should I clean the fuel injectors?Can I use a pour-in fuel additive instead of an inline cleaning kit?
Related Parts
Dielectric grease
$6
Valve cover gasket set with spark plug tube seals
Motorcraft (typical OEM for Ford) / aftermarket equivalents$75
Spark plugs (set of 8)
NGK / Motorcraft$90
RTV silicone sealant (small tube)
$5
Engine degreaser / shop towels
$10
Related Tools
Torque wrench
Socket set & ratchet (including 10mm, 8mm, extensions)
Spark plug socket (5/8" or 13/16") with extension and swivel
Flat screwdriver / gasket scraper
Shop vacuum / compressed air
