Join Date: Sep 2008
Location: Sparta, Missouri
You're very right Steve. Usually, the upper intake needs to be replaced because the heat from the heat riser distorts the plastic intake, which is why they start to leak in the first place.
*NOTE!!! The PCV valve DOES NOT come installed in the upper intake. DO NOT assemble the upper intake without installing the PCV valve under the map sensor. If you do, the car will run fine, but it will whistle and will shut off if you remove the oil filler cap with engine running.
............ask me how I know that little tid bit.
Don't listen to me, what do I know? I've only been doing this for 30 years.