The 2 valves on the valve cover
CF Veteran
Joined: Mar 2015
Posts: 1,203
Likes: 154
From: Northern CT
Year: 1995
Model: Cherokee
Engine: Turbo 4.0
The crank case ventilation? One is just a hole. The other is just a small hole. Filtered air is pulled from the air box through the valve cover then into the intake manifold. The oil vapor rich air is pulled into the combustion chamber where it lowers the octane rating of the overall charge mix/gets burnt for emissions.
CF Veteran
Joined: Sep 2017
Posts: 1,560
Likes: 307
From: MO
Year: 1996
Model: Cherokee (XJ)
Engine: 4.0
CF Veteran
Joined: Oct 2018
Posts: 1,096
Likes: 166
From: Hunt County Texas
Year: 1995
Model: Cherokee (XJ)
Engine: 4.0L
If you are looking to replace them you will need the following parts. These can also be acquired locally, my NAPA had them all but I'm sure other big box parts stores either have them on hand or can order them in.
2 of these grommets.
Then one each of these.
Small hole elbow goes in the rear and the tube goes to the intake manifold. Large hole elbow goes in the front, tube to the airbox.
2 of these grommets.
Then one each of these.
Small hole elbow goes in the rear and the tube goes to the intake manifold. Large hole elbow goes in the front, tube to the airbox.
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