Car Problem Reports

Subaru Forester Worn Out Gaskets Allowed Oil to Seep Into Spark Plugs

Subaru Forester Problem
35 Reports
Me Too

Model Years Affected: 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010

Engine Affected: 2.5L 4 Cylinder

Average Mileage: 102,543 mi (19,000 mi - 237,000 mi)


An oil leak can develop from the spark plug tube seals. Excess oil in the spark plug tubes can result in engine misfires and illumination of the Check Engine Light. Our technicians tell us that removing the valve cover and replacing the tube seals and cover gasket is necessary to correct this concern. Oil damaged spark plugs, ignition wires, and ignition coils will also require replacement.

  • Visitor, , 2.5L 4 Cylinder, 84,000 mi

    Oil is leaking into spark plug area. No legitimate explanation for this problem. It will be a necessary and expensive repair. I am very dissatisfied with Subaru. I will likely buy a Toyota next time.

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  • Visitor, , 2.5L 4 Cylinder, 55,000 mi

    Oil Leaked into Spark Plug Tubes causing misfire on Cyl 3,4. This was repaired then CC showed bad. After replacement of CC under warranty misfire problem is back. Dealer replacing Coil Pack (not under warranty).

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  • Visitor, , 2.5L 4 Cylinder, 149,000 mi

    I have the same problem with my car misfire Check engine light and the car stalking intermittent

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  • Visitor, , 2.5L 4 Cylinder, 63,000 mi

    Pulled the boots to change the plugs and discovered oil all over them. New seals are on order now, looks like I've got another weekend project. I don't mind maintaining my vehicles but this is ridiculous! Why would Subaru allow for something like this to go on for so long???

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  • Visitor, , 80,000 mi

    Oil leaked into spark plug tubes. Destroyed coil and wires. Replaced all.

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  •  Enthusiast

    Worn out spark plug tube gasket and or valve cover gasket allowed oil to seep into spark plugs, which damages the spark plug wires. Needed to replace the spark plugs, wires, & gaskets.

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  • moonunit, , 2.5L 4 Cylinder, 82,000 mi

    Oil found in spark plugs when switching them. Changed valve cover gaskets and spark plug seals but now it runs rough.

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  • Visitor, , 2.5L 4 Cylinder, 132,000 mi

    Initially check engine light came on, I checked the code and got P0301 (cylinder 1 misfire) While replacing plugs I found oil had seeped into all the boots. I've replaced all the boots and will replace the gaskets next.

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  • Visitor, , 2.5L 4 Cylinder, 100,000 mi

    Oil leaking into spark plugs. Am inquiring about how to get new tube seals and cover gaskets

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  • Visitor, , 2.5L 4 Cylinder, 50,000 mi

    Car is 12 years old but only has 80,000km on the clock. Townsville Australia.

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