Intake manifold gasket...a friend had the same problem (same year car) and we fixed it a couple of weekends go, so far, no leaks. It isn't too big of a job, just like advertised in the Haynes manual. ==New Answer== A little more helpful, you might need to replace the intake manifold gasket, OR it could be you need to change your spark plug tube seals. That in itself is real easy and you can purchase the seals at any autoparts store.
The seal on the top of the plug tubes are leaking. You need to change the valve cover gasket and plug tube seals.
Under the valve cover there are seals on top of the plug tubes, you will need to replace the valve cover gasket and plug tube seals.
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The spark plugs are located underneath the four black rubber plugs visible on the top of the engine valve cover. When you open the hood, there will be a black plastic box with four short black rubber wires mounted to the top of the valve cover above the bar that says '2.0 liter 16 valve'. Pull off the 4 plugs and the spark plugs will be accessable at the bottom of the tubes that are exposed.
With mine the spark plug tube gasket broke and one of the spark plug tubes was flooded with oil. Also try changing the sparkplugs. With mine the spark plug tube gasket broke and one of the spark plug tubes was flooded with oil. Also try changing the sparkplugs. With mine the spark plug tube gasket broke and one of the spark plug tubes was flooded with oil. Also try changing the sparkplugs.
injector tubes are leaking
The HEMI engines don't have 'spark plug wires' as you're used to seeing, they have coil-over plugs...those small black rectangles with the wires coming from them on either side of the intake plenum. Should be some very long screws holding them on, but are pretty easy to remove. -- No 'spark plug wires' to replace on the HEMIs. There are two plugs per cylinder in the 5.7 liter and 6.1 liter hemi's under those black squares with the two bolts holding them down. You loosen those two bolts per (you don't need to remove them completly) then remove the coils (the black boxes) and remove them. you will see two black rubber tubes (plug connecters) and that will show the plugs underneath.
There is a gasket underneath the valve cover that goes around the outer edge and around the center of the cover around the spark plug tubes. These gaskets are prone to leakage and must be replaced.
Remove the tubes if possible and use carb cleaner and compressed air.
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Take off the plastic cover on top of the engine and you will see the coils & plug tubes with the plugs at the bottom of the tubes
Check the drain tubes. If you pull off the a-pillar trims (between the windshield and the door glass) you'll notice a rubber hose that runs down the a-pillar to the firewall. take them off the moonroof end and blow them out with air. there's one on each side.