Muffler bearings lmao,
But i would check fuel filter and change the plugs, one round of bad gass one missfire and your plug will never fire the same again. Cap and rotor ? take off the cap and have a look see at the points think cap and rotor should cost >30
and i would use NGK vpower platnium plugs they are a lot more durable then other cheeper brands. "but run bosh in a volkswagon"
PCV , what does the inside of your radiator smell like can you smell gass or oil in the radiator.
maby take off your air filter and get a can of Throtel biody cleaner, or carb cleaner and folow the instructions" spray it in the intake while the motor is running.
When all else fails go get a can of SEAFOAM. unplug a main vacume hose and stuffit in the bottle while the motor is idel nd let it suck the stuff up untill the motor dies. wait i think 30 min start her back up agin. " THIS WILL GENERATE ENOUGH SMOKE TO FILL UP 1BLOCK"
But it cleans all the vacume ports and lines on the motor also foams up in the intake manifold and disolvs the carbon almost instantly.
oh read the instructions first.
my 2 cents worth