Subaru Forester Problem Report

Subaru Forester Engine Misfire Due to Oil in Spark Plug Tubes

(36 reports)

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.

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. -
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). -
I have the same problem with my car misfire Check engine light and the car stalking intermittent -
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??? -
Oil leaked into spark plug tubes. Destroyed coil and wires. Replaced all. -
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. -
Same story. Seems to have been fixed in a satisfactory manner,but I've owned 4 Subarus, and every one of them had oil leaks from seals, gaskets etc. Last time ever buying one of these. -
Oil found in spark plugs when switching them. Changed valve cover gaskets and spark plug seals but now it runs rough. -
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. -
Oil leaking into spark plugs. Am inquiring about how to get new tube seals and cover gaskets -
Car is 12 years old but only has 80,000km on the clock. Townsville Australia. -
plugs arnt soaked in oill buy when i pull wire to change plug theres a small puddle of oil on top of ring -
Spark plug wires and rubber boots covered in oil. Diagnosis was that engine needed new cover seals. Not resolved yet. -
Check engine light began flashing and then shutting off - system code was for a misfire in cylinder two. Spark plugs and wires were covered in oil, replaced seals, plugs, wires and ignition coil. So far, so good. -
This is the problem...now need to fix -
Noticed gas mileage declining. Thought the spark plugs might need changed, getting close to the time for it anyway. I wanted to check the plugs but found oil in the plug wells. I put it back together and I am persuing factory warranty replacement for all seals that could be contributing to the problem. Not sure if this will be covered but it seems like it should be part of the 60k powertrain warranty. -
Oil was leaking int spark plugs....eventually caused misfire (flasning check engine light) Replaced seals/gaskets, plugs, and wires. -
Engine misfire related to oil leak filling spark plug tube, replaced valve cover gaskets -
Burning oil small in passenger compartment. Oil leaking onto manifold from valve cover/spark plug gaskets. Replaced valve cover/spark plug gaskets. # weeks later problem returns. Bringing back for re-evaluation. -
Not yet fixed....but during routine replacement of spark plugs found oil getting past tube seals and putting light coat of oil on wires. No oil in plug cylinder or on plug. Replaced spark plugs and cleaned wires. Will keep eye on it for now. -
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I detected a cylinder misfire..I have changed my spark plugs, the plugs wires looks okay to me...
th at oil temp is flashing i checked all the air hoses going to and from air box. all is fine....