NHTSA Complaint #10329073 — 2001 JEEP WRANGLER

ENGINE AND ENGINE COOLING issue reported to NHTSA

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Complaint Details

ODI Number	10329073
Vehicle	2001 JEEP WRANGLER
Component	ENGINE AND ENGINE COOLING
Date of Incident	June 14, 2008
Date Filed	May 5, 2010
Mileage	25,000 miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	CA

Consumer Description

2001 JEEP TJ, 40,000 MILES, SLOWLY LOSING COOLANT OVER THE COURSE OF 4 YRS. USED A PRESSURE TESTER AND VERIFIED NO EXTERNAL LEAKS. HOWEVER, USED THE SAME PRESSURE TESTER WITH ENGINE RUNNING, PER THE INSTRUCTIONS, AND THE SYSTEM GRADUALLY BUILT PRESSURE FROM 18 LBS TO 25 LBS BEFORE I STOPPED THE TEST. THIS INDICATES COOLANT LEAKING INTO THE COMBUSTION CHAMBER. CURRENTLY MY OIL PRESSURE IS GOOD AND THERE IS NO COOLANT CONTAMINATION ON THE DIP STICK OR UNDER THE OIL FILL CAP. AT RISK (LONG TERM) IS THE INTERNAL ENGINE BEARINGS: CAM AND CRANKSHAFT. I FOUND A THREAD ON THE INTERNET THAT COVERS MANY JEEP TJ OWNERS WITH THE EXACT SAME PROBLEM OF COOLANT LOSS. THIS IS ALL DUE TO A BAD BATCH OF CYLINDER HEADS WITH CASTING # 0331, MANUFACTURED FROM 2000 THROUGH 2006. *TR

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