Totally absurd. Whoever said that is foolish. Read post #1 https://forums.fordthunderbirdforum...-05-ford-thunderbird-ignition-coils-cop.5040/
Hello, this will likely be the valve cover gaskets. They get less flexible with the extreme heat of the engine. There are o-rings around each of the spark plugs which will be the source of the leak. New valve cover gasket set is the only answer,not expensive but a bit of labour involved, particularly on the driver's side and involves the fuel line to be depressurized and split at the connection above the valve cover. Try Rock Auto where you have a choice of gasket brands. I've just done mine on both sides. Good opportunity to replace the o-ring at the base of the oil filler tube too. It's not a hard job, just a bit hard to get to some bolts. Good luck IanHello, Just purchased an 03 with 51k miles. The engine light came on and the scan showed cylinder 7 misfire. In the process of replacing all of my coils and plugs, i noticed the spark plug for cylinder 7 was dripping with oil. I believe this is evidence of a leaking gasket somewhere. My question is should I bother continuing to replace the coil packs and plugs knowing I haven't fixes the root cause?
Also does anyone know why there would be oil on just the one plug?
This a great community and resource to have. Thanks in advance.
Needing to replace coils on my 05. Any recommendations for a decent coil would be appreciated. Have seen them priced all over the place and am at a loss ..... Thanks!I would definitely replace all the coils and all the the plugs too. Make sure you use never-seize on the plug threads and di-electric grease on the coil end that slips on the plugs. I usually watch you-tube videos on any project that I'm about do myself. It saves a lot of of grief.
I'd also like to say even if a spark plug looks fine there can be something wrong or weak on the inside. It happened to me on a one cylinder Kohler motor and cost me weeks of useless work and replacement parts I didn't need. I took the motor to an expert and he did everything he knew and couldn't get it started. Baffled, he just put a plug in as a last resort and it ran perfect.
That plug probably cost me a grand or so. It must have come apart inside with no signs of trouble.
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