Sealed H547CP 20 engine piston for the 1987-1993 Chevrolet LLV 4-cylinder 2.5L and other vehicles seals the cylinder to help limit blow-by. It is a 0.020 in oversize cast piston with a coated skirt and a recessed head.
- Helps improve cylinder sealing for less blow-by
- Retains standard ring gaps in the top groove
- DUROSHIELD skirt-coated piston
- Moly-graphite coating reduces friction for higher fuel economy
- Piston protects against damage from inadequate lubrication on start-up
Quick facts
- Part: Sealed H547CP 20 engine piston
- Fits: 1987-1993 Chevrolet LLV 4-cylinder 2.5L and other vehicles
- Material: Hypereutectic
- Condition: New
Oil smoke, blow-by or a knock when the engine is cold can point to worn pistons, but worn rings or valve seals can produce similar symptoms, so have a shop confirm the cause with its own tests before you order. Because this piston is 0.020 in oversize, the cylinder bore has to be measured to suit it.
Fits
The fitment includes the 1985-1993 Chevrolet S10 4-cylinder 2.5L and the 1991-1993 GMC Sonoma 4-cylinder 2.5L, along with many other vehicles. If your vehicle is not named here, find it in the "Vehicles it fits" section by year and engine.
Specifications
Fit and size
- Quantity per vehicle: 4
- Bore diameter: 4.0000 in
- Oversize: 0.020 in
- Piston pin outside diameter: 0.9275 in (23.559 mm)
- Compression height: 1.560 in
- Pin offset: 0.04 in (1.016 mm)
- Ring thickness: top 0.0625 in, second 0.0781 in, oil 0.1875 in
Build and materials
- Type: cast piston set
- Piston material: hypereutectic
- Piston head: recessed
- Skirt coating: DUROSHIELD
- Condition: New
- Country of origin: India
In the box
This listing is a piston set, and the 4-cylinder engine takes four pistons. Assembly lubricant is not included.
Installation notes
- Minimum clearance: see the piston fitting information on the carton label.
Interchange: P450H020 · 9H3121020 · H3121020
This part cross-references / interchanges with the following part numbers:
P450H020, 9H3121020, H3121020
Frequently Asked Questions
Does the Sealed H547CP 20 piston fit the 1985-1993 Chevrolet S10 4-cylinder 2.5L?
Yes. Sealed H547CP 20 fits the 1985-1993 Chevrolet S10 4-cylinder 2.5L, which takes four pistons. For other vehicles, check the "Vehicles it fits" section.
What is the piston material on this Sealed Power piston set?
The piston material is hypereutectic. It is a cast piston set with a DUROSHIELD skirt coating.
Is the Sealed H547CP 20 a standard-size or oversize piston?
Sealed H547CP 20 is oversize by 0.020 in. The listed bore diameter is 4.0000 in.
Does this piston set come with assembly lubricant?
No. Assembly lubricant is not included, so it has to be bought separately. The 4-cylinder engine takes four pistons.
Where do I find the piston-to-bore clearance for these pistons?
The minimum clearance for these pistons is on the piston fitting information printed on the carton label.
