I'm trying to learn more about this car, and I have some questions about the intake manifold. In my case, I've removed it from the engine so now I can examine it thuroughly. I notice there's oil in it, not alot, but I can see there is a film of it along the passages, and if I tip it, some oil will drip out. Is that normal? If not, can someone explain what might be wrong. If there are cracks in it, besides visual inspection, is there a way to find cracks? should I remove all the sensors and clean it out? If so, what should I use to clean it?

 

PCV valve is more then likely faulty and use brake clean to clean it out

 

Very good. I'll assume I need to remove the sensors as well. Thanks for your response. JG