1999 Jeep Wrangler Sport from North America - Comments

1) Coolant leak - internal to engine head - cracks - very expensive repair ($1200 to $2500 +)

2) Overheating

3) Oil pressure low - (gauge) 0 at idle! And lower as engine warms up - check gauges light

4) Coolant contaminates oil

5) Coolant contaminates catalytic convertor

6) Air conditioner system failure ($3,500 repair) - air divertor door also sticks.

Not just a Wrangler problem - these problems are across Jeep product line using common engine (4.0 l V-6) and components!!!

First of all the 4.0 liter engine is not a V6 - it is an in-line six.

Secondly, this engine is as close to bullet-proof as you can get. They are not a problematic engine at all (as you suggest).

Between myself and my wife, we have owned 4 Jeeps equipped with the 4.0 liter engine and never experienced any problems at all. Ask any Jeep enthusiast about the 4.0 and they will tell you that it is one of the best engines ever built.

I agree, having owned 2 jeeps (1991 Comanche, 1990 Cherokee Laredo) with the in-line 4.0 six cylinder, it is a bullet-proof engine, no problems! The Comanche has 186K on it, still going strong, and the 1990 Cherokee has minimal mileage for it's year, 100k, but has not even the first oil leak or any concern at all! If manufacturers made engines and autos like this today, they would not be facing possible bankruptcy.

My current Wrangler (a 1995 YJ Sport) equipped with the 4.0 liter six, has approx. 140,000 miles on it, and it still runs like new. It does not burn any oil. It doesn't leak any oil.

I have not had one issue with it. Great engine!