spark plug gasket seals? valve cover gasket question
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Joined: Jul 2012
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2002 CL500 to CL55 conversion
spark plug gasket seals? valve cover gasket question
do the spark plug seal gaskets come with the valve cover gasket? im getting a misfire under full throttle on cylinder 8 (p0308) and i noticed some oil on the bottom of the ignition coil on the rear passenger side cylinder (i'm guessing that's cylinder 8?)
i ordered the ignition coil thinking i would be fine but it seems my passenger valve cover gasket is seeping in multiple places so i figured i would just re do the entire thing, i'm guessing it's also time to change the spark plug on that cylinder since oil is probably on the spark plug if it's managed to seep onto the ignition coil
info on the gasket sets is appreciated!
i ordered the ignition coil thinking i would be fine but it seems my passenger valve cover gasket is seeping in multiple places so i figured i would just re do the entire thing, i'm guessing it's also time to change the spark plug on that cylinder since oil is probably on the spark plug if it's managed to seep onto the ignition coil
info on the gasket sets is appreciated!
Thread Starter
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,254
Likes: 171
2002 CL500 to CL55 conversion
that makes sense now that i've gotten deeper into the engine bay, i got the misfire to go away by swapping out the ignition coil on cylinder 8 with a new one. but the old ignition coil had oil on it? im sure this is not normal as most mercedes mechanics want to replace most electronics with oil on them before they turn into electrical gremlins
upon cold start i still get a misfire on that same cylinder however, and it seems its only a matter of time before this ignition coil goes bad from gathering oil as well. it almost seems as if the oil is coming out of the hole for the screw that retains the ignition coil? can this be corrected with a valve cover gasket job? or is my 8th cylinder toast and letting oil up past the piston (which explains why the ignition coil is gathering oil
)
edit - misfire only happens on cold start under heavy acceleration (late for work) but corrects itself whenever i restart the car at a redlight (usually good for the rest of the day)
i've also noticed an unpleasant shaking around 80 mph on the highway which i believe is engine related and not wheel/tire related, but i figured if it was misfiring at all the car would throw codes?
codes pulled thus far : p0300 p0308
upon cold start i still get a misfire on that same cylinder however, and it seems its only a matter of time before this ignition coil goes bad from gathering oil as well. it almost seems as if the oil is coming out of the hole for the screw that retains the ignition coil? can this be corrected with a valve cover gasket job? or is my 8th cylinder toast and letting oil up past the piston (which explains why the ignition coil is gathering oil
)edit - misfire only happens on cold start under heavy acceleration (late for work) but corrects itself whenever i restart the car at a redlight (usually good for the rest of the day)
i've also noticed an unpleasant shaking around 80 mph on the highway which i believe is engine related and not wheel/tire related, but i figured if it was misfiring at all the car would throw codes?
codes pulled thus far : p0300 p0308
Last edited by ctravis595; Oct 12, 2012 at 10:08 AM.
