In 1987 AMC introduced the Jeep Wrangler to replace the older CJ series. In 1988 Chrysler bought the Jeep line and continues to produce the off-road vehicle today. Older Jeep Wranglers require their owners to maintain them properly to ensure off-road reliability.
Replace the Engine Oil
Using an improper grade of engine oil can cause low oil pressures. Engine overheating is another symptom of improper grades of engine oil. Drain and replace the engine oil with the grade specified by the Jeep's service manual. Replace the oil filter at the same time.
Check the Condition of the Oil
Dirty engine oil clogs oil filters and passages. These clogs prevent the oil from reaching critical areas of the engine. Low oil pressures may result from clogs. Drain the engine oil and remove the oil filter. Inspect the filter for clogs or sludge.
Check the Oil Pressure
Using an engine oil pressure test kit, test the amount of pressure generated by the oil pump. If the oil pressure test kit indicates that the oil pump generates pressures within the specifications for the engine type, the problem may be the Jeep's oil pressure gauge. If the pressures are not within the service manual's specifications, the oil pump may be worn.
- "Haynes Repair Manual: Jeep Wrangler 1987 thru 2008"; Mike Stubblefield and John Haynes; 2009
- Photo Credit Jupiterimages/Comstock/Getty Images
Jeep Grand Cherokee Oil Pressure Problems
Oil pressure problems are common in the Jeep Grand Cherokee, especially in older models that are starting to rack up the miles....
How to Remove an Oil Pump on a Jeep Wrangler
This is the basic way to change the oil pump in a jeep wrangler.
Troubleshooting a Jeep Wrangler Engine
The most common problems with the Wrangler occur with computer controlled devices and easily repairable components. The majority of problems in today's...
How to Change an Oil Pressure Sending Unit
Modern vehicles take in and relay a lot of information, mostly via electronic signals and sensors. Back in the old days, oil...
How to Check the Oil in a Jeep Wrangler JK
Whether you're driving on the road or on the trail, your Jeep's engine needs oil to run smoothly and efficiently. It's important...
How to Change the Oil Pressure Sending Unit on a 1997 Jeep Wrangler
The engine oil pressure gauge falls to zero on your 1997 Wrangler and visions of expensive repairs flash through your mind. A...
How do I Change a Water Pump in a 97 Jeep Wrangler?
The water pump on the 1997 Jeep Wrangler is located in the front of the engine. The pump pulls water from the...
How to Remove Sludge From a Fuel Oil Tank
Prolonged storage of oil in a fuel storage tank can lead to the accumulation of sludge at the bottom of the container....
The Oil Specifications for a 1987 Jeep Wrangler
Off-road enthusiasts and many others find the Jeep Wrangler series enjoyable. Over the years, Jeep has offered the Wrangler with minimal changes...