Quote:
Originally Posted by Dry suit diver
yup it has a PCV. my 96 XJ did so tyhe 97 engine will definitly
give autozone the engine number.
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Neither have PCV, both have CCV (closed crankcase ventilation). Meaning they have a hose at the back of the valve cover similar to PCV but no PCV valve. Just a 90º plastic elbow at the valve cover.
Oil in the airbox is generally caused by a clogged CCV system.
Find the line that runs from the valve cover to the airbox. Pull the end off the airbox with the engine running and that hose should be sucking fresh air into the valve cover from the airbox.
If air is being pushed out of the valve cover, find the vacuum line from the valve cover to the intake manifold. This is the other half of the CCV and is how the engine is supposed to burn the crankcase vapors. Pull the end of the hose from the valve cover and check for vacuum sucking into the intake manifold. If no vacuum, it's obstructed. Most of these hoses have an inline restriction orifice that easily clogs with carbon. It looks like a plastic hose splice but pull it apart and clean it. I use a straightened paper clip.