Sealed 525AP 30 piston set for the 1987-1995 Jeep Wrangler 4-cylinder 2.5L and other vehicles transfers combustion force to the connecting rod. The pistons are made to meet or go beyond OEM specifications.
- Cast aluminum pistons made with FM132 eutectic proprietary alloy
- Recessed piston head type
- Pin offset of 0.06 inch (1.524 mm) and compression height of 1.580 inch
- Top and second compression ring thickness of 0.0781 inch, oil ring thickness of 0.1875 inch
Quick facts
- Part: Sealed 525AP 30 piston set
- Also called: engine piston set
- Fits: 1987-1995 Jeep Wrangler 4-cylinder 2.5L and other vehicles
- Material: Cast aluminum
- Condition: New
A worn or damaged engine piston set can show up as oil use, blue exhaust smoke or a knock from the engine. Before you replace the pistons, rule out worn rings, valve guide wear and a head gasket leak, which a shop can separate with compression and leak-down tests.
Fits
Vehicles it fits include the 1984-1995 Jeep Cherokee 4-cylinder 2.5L and the 1986-1992 Jeep Comanche 4-cylinder 2.5L. If your Jeep, American Motors or Eagle model isn't named here, you can look it up in the "Vehicles it fits" section.
Specifications
Fit and size
- Bore diameter: 3.8750 in
- Oversize: 0.030 in
- Piston pin outside diameter: 0.931 in (23.647 mm)
- Quantity per vehicle: 4
Build and materials
- Material: Cast aluminum
- Grade type: Premium
- Condition: New
- Country of origin: India
In the box
This listing holds one piston set, and the 4-cylinder 2.5L engine takes four pistons. Assembly lubricant is not included.
Interchange: P1593(4)030
Frequently Asked Questions
Is the Sealed 525AP 30 piston set right for the 1987-1995 Jeep Wrangler 4-cylinder 2.5L?
Yes. Sealed 525AP 30 fits the 1987-1995 Jeep Wrangler 4-cylinder 2.5L, which takes four pistons. Other Jeep, American Motors and Eagle models are in the "Vehicles it fits" section.
Does the Sealed 525AP 30 piston set include assembly lubricant?
No. Sealed 525AP 30 does not include assembly lubricant, so it is ordered separately. The listing is one piston set, and the engine takes four pistons.
How much oversize is this piston set, and what are its main diameters?
This piston set is 0.030 inch oversize. The bore diameter is 3.8750 inch, and the piston pin outside diameter is 0.931 inch (23.647 mm).
How do I tell if my engine's pistons are wearing out?
Worn pistons can show up as oil use, blue exhaust smoke or a knock from the engine. A shop can measure compression to see what is going on inside the cylinders.
Does P1593(4)030 interchange with Sealed 525AP 30?
Yes. P1593(4)030 is listed as an interchange number for the Sealed 525AP 30 piston set.
