In this video, I explain the importance of a Continuous Crankcase Ventilation (CCV) system and how it works on the AMC 4.0L (and 2.5L). I replaced the grommets and elbows in the valve cover as seen on the 1996 - 2001 Jeep Cherokee. It's not a PCV system, but it doesn't really matter what you call it.

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Part Numbers:
VALVE COVER - DORMAN: 264983
VALVE COVER GASKET - FEL-PRO: VS50458R
REAR CCV ELBOW (Metered) - DORMAN: 47057
FRONT CCV ELBOW (Open) - MOPAR: 53030991

VALVE COVER GROMMET - MOPAR: 2946079
VALVE COVER GROMMET - DORMAN: 42344

REAR HOSE FITTINGS - DORMAN: 47128
FRONT HOSE FITTINGS - DORMAN: 47123

Front CCV hose (Valve Cover to Air Box): https://www.summitracing.com/parts/cw...

Rear CCV hose (Valve Cover to Intake Manifold): [Unknown]
You'll have to either find a used one from a donor 4.0L, or make your own with universal oil rated hose. Note this rear hoses is different from 1996 - 1998/ 1999 - 2001 because of the different intake manifold.

After replacing the CCV stuff and valve cover gasket, I deleted the racing cone filter and performed an oil change, using Rotella T6 5W-40 Diesel Oil. https://www.amazon.com/Shell-Rotella-...


Also, DO NOT buy THIS set of fittings: https://www.amazon.com/dp/B08NSNPSGK?...
do NOT buy them, they are backwards - the metered hole is on the front and the open tube is on the back one. They're inverted. They will still work, but not as intended from the factory.

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