Change valve cover gaskets now check engine light is on and the car bogs around 3000 r p ms

SOURCE: how to replace valve cover gasket on a 2002 stratus 3.0 liter engine

i don't know that vehicle very well... but there are usually bolts/screws that hold them in place. 4 to 6 of them per cover. sometimes the spark plug holes have giant nuts that hold the cover in place.

SOURCE: valve cover gasket leaking

When you buy the valve cover set, it will include the spark plug well "O" rings. Simply remove the valve cover and on the underside of the valve cover, you'll see the "O" rings that need replaced and you'll see exactly how the valve cover gasket itself fits.

SOURCE: replace valve cover gasket

I have the same problem on a 2003 Town & Country. The cover for the front 3 cylinders is quite straight forward, but in order to do the rear cylinders I believe you are going to have to remove the cowling below the windshield. You will need a gear puller to remover the windshield wipers first, then remove the cowling. Than should give you more room to work. It's still not going to be easy, but it sure beats paying hundreds of $$$$ in labor charges.

SOURCE: reset check engin light

White smoke from exhaust indicates burning coolant. Blue smoke from the exhaust indicates burning oil. In replacing the valve cover gasket for an oil leak, some smoke from residual oil is normal but it would be excess oil burning off on the manifold from the engine compartment, not the exhaust. Hope this helps with your question.
Greg

SOURCE: replace valve cover gaskets on subaru svx

the truth about thse engines is they are hard to work on. if the valve covers are unbolted and still ****, try getting a rectangular peice of wood and putting it on the side of the cover neer the gasget, tap on the other end with a hammmer from all angles to try to break the seal.

this is a common problem with valve covers that havent ever been removed and they heat up, and cool down so many times they practically bake onto the head