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  • oil in spark plugs

    g'day all,todays problem is oil in the spark plug well,so research tells me 'that valve cover gasket or cylinder head spark plug guide may need replacing which im going to tackle today.what gets me is the gasket doesnt seem to to be leaking oil to the outside of the motor.there are no codes coming up but the the engine idles at 1400rpm and misfires,question is if its not the gasket what else could it be?thanks for your input much appreciated

  • #2
    Maybe the spark plug shaft seals themselves. If they’re like the 90, the seals seat in the rocker covers themselves on the underside. You need the correct sized socket to “press” them in with moderate tapping from above with a hammer to seat them properly. Can be tedious making sure they’re all in place properly. When the rocker covers go back on, the spark plug shaft seals will neatly sit over the top of the spark plug shafts sealing them off from outside oil ingress preventing oil from entering into the spark plug wells. Hopefully the oil in the well has interrupted the electrical pulse from the coil to the spark plug and that’s all your problem is. If your spark plug shaft seals are on their way out, replace your rocker cover gaskets too since you’ll be doing a fairly involved process anyway. Aftermarket kits with all the gasket seals you need sell for around $100.
    Brett1979
    Avid PP Poster!
    Last edited by Brett1979; 01-04-2020, 10:40 PM.
    2005 120 series V6 Grande, 2 inch susp lift (King/EFS combo), 32 inch MT’s, Safari Snorkel, rear diff lock, breathers, Light Force spotlights, UHF, dual batteries.

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