Teraflex JL / JT 3.6L: Crankcase Vent System Kit

$395.00 Inc Gst

Available on back-order


The TeraFlex JL / JT 3.6L: Crankcase Vent System Kit (CVS) prevents oil from being drawn into the intake by engine vacuum while driving on extreme inclines. This kit adds a second PCV valve to the front of the engine via an oil fill cap adapter and T-fitting. Adding a second PCV valve at the opposite end of the engine ensures only air is allowed to enter the crankcase vent system regardless of engine orientation while off-roading. A Ball Check Valve System cuts the flow of oil ensuring oil is kept away from the intake. On steep inclines, engine oil flows to the rear of the engine and valve covers. At extreme angles, the factory PCV system allows engine vacuum to draw oil through the PCV valve and intake into the combustion chamber. This causes exhaust smoke from the burning oil and possibly hydro locking the engine and other internal damage.

Features & Benefits

  • • Prevents oil from entering PCV system and intake when on steep inclines
  • • Prevents burning oil/smoke, hydro lock, burnt starters, internal engine damage, etc.
  • • Utilizes existing oil fill in valve cover to add a front PCV valve to existing system
  • • Oil fill cap to crankcase vent adapter connects to existing PCV system via a T-fitting
  • • Emissions compliant — PCV function is unchanged
  • • Ball Check Valve System cuts the flow of oil ensuring oil is kept away from the intake
  • • Retains OEM oil cap function and use
  • • Easy install
  • • Patent Pending


  • • JL Wrangler (2-door)
  • • JL Wrangler Unlimited (4-door)
  • • JT Gladiator (pickup) Specs:
  • • Engine: 3.6-liter Pentastar V-6 ONLY
  • • Left-Hand Drive models ONLY — does NOT fit Right-Hand Drive models
  • • Does NOT fit 2.0-liter Turbo I-4, 3.0-liter EcoDiesel V-6, or 392/6.4-liter Hemi V-8

Additional information

Weight 50 kg
Dimensions 200 × 50 × 50 cm






TeraFlex manufactures components for the Jeep Wrangler including premium suspension systems and performance shocks, heavy-duty axles and low-range gearing, body armor, and more. With our roots dating back to the 1950s beginning as MEPCO (Military Equipment Parts Company), a distributor of Jeep parts and accessories, we have gained a vast knowledge of the various CJ/Wrangler platforms. In the fall of 1996, TeraFlex began manufacturing parts in-house to fulfill the need for heavy-duty off-road suspension pieces and equipment for the then-new TJ Wrangler. Our experience and knowledge has allowed us to create the unique and innovative parts and accessories that fill out our product line today ensuring TeraFlex’s dominant hold on the Jeep market.