Car Problem Reports

Jeep Liberty Moisture May Collect in PCV System and Freeze in Cold Climates

Jeep Liberty Problem
13 Reports
Me Too

Model Years Affected: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010

Exhaust & Emissions Affected: 3.7L V6

Average Mileage: 79,666 mi (73,000 mi - 90,000 mi)


The 3.7L V6 and 4.7L V8 in very cold climates (below freezing temperatures) moisture can collect in the Positive Crankcase Ventilation (PCV) system and freeze. This will cause various drivability problems and there are revised PCV system components to repair this concern.

  • Visitor, , 90,000 mi

    My PCV lines froze and blew both my valve cover gaskets - twice so far. Live in alaska and temps were 25-40 below at the time. After first repair, started parking indoors at work (no garage at home) and letting engine idle for 25 minutes after running short trips to and from work (17miles) and covering hood with a blanket at night while plugged in at home.

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  • Visitor, , 76,000 mi

    moisture on the filler cap and in engine

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