Sealed H345DCP 20 engine piston for the 1982-1985 Chevrolet Impala V8 5.7L and other vehicles forms the floor of the combustion chamber and passes combustion force down to the connecting rod.
- Hypereutectic piston made with exclusive FM425 material for strength and scuff resistance
- FM425 material allows a tighter bore and improves sealing for less blow-by
- Barrel skirt profiles help optimize the oil wedge between skirt and wall
- Piston skirts protected by next-gen DUROSHIELD coating
- TAC ring groove geometry
- Weight matched to +/- 2 grams
Quick facts
- Part: Sealed H345DCP 20 engine piston
- Fits: the 1982-1985 Chevrolet Impala V8 5.7L and other vehicles
- Material: Hypereutectic
- Condition: New
Worn pistons can show up as oil use, blue exhaust smoke, lost compression or a knock from a cold engine, although tired rings or a worn bore can produce those symptoms too. Before you replace pistons, measure the cylinder bores with the engine apart and compare taper and out-of-round to the bore size, because the bore may be where the trouble is.
Fits
Chevrolet, GMC, Pontiac and Cadillac models are listed for this piston, led by the 1982-1985 Chevrolet Impala V8 5.7L, the 1987-1990 Chevrolet Camaro V8 5.7L and the 1985-1990 Chevrolet Caprice V8 5.7L. The 5.7L V8 in each takes eight pistons. Driving something else? Look up your year and engine in the "Vehicles it fits" section.
Specifications
Fit and size
- Bore diameter: 4.020 in
- Oversize: 0.020 in
- Piston pin outside diameter: 0.927 in
- Compression height: 1.548 in
- Top and second compression ring thickness: 0.0781 in
- Oil ring thickness: 0.1875 in
- Dome volume: negative 6.9 cc
- Weight: 688 g with pin, 539 g without pin
- Quantity per application: 8
Build and materials
- Piston material: Hypereutectic
- Piston head type: Flat
- Skirt coating: DUROSHIELD
- Condition: New
- Country of origin: India
In the box
Assembly lubricant is not included.
Interchange: P3103.20 · P1534(8)020 · 224-2770.020
This part cross-references / interchanges with the following part numbers:
P3103.20, P1534(8)020, 224-2770.020
Frequently Asked Questions
Is the Sealed H345DCP 20 piston right for the 1987-1990 Chevrolet Camaro V8 5.7L?
Yes. Sealed H345DCP 20 is listed for the 1987-1990 Chevrolet Camaro V8 5.7L. Other 5.7L V8 models are in the "Vehicles it fits" section.
Does the H345DCP 20 piston come with assembly lubricant?
No. Assembly lubricant is not included with Sealed H345DCP 20, so you will need to get it separately.
What bore size is this oversize piston made for?
This piston is a 0.020 in oversize design for a 4.020 in bore, with a pin outside diameter of 0.927 in.
How much does this hypereutectic piston weigh?
This piston weighs 688 g with the pin and 539 g without it. The pistons are weight matched to +/- 2 grams.
Is P3103.20 an interchange number for the H345DCP 20 piston?
Yes. P3103.20 is on the interchange list for Sealed H345DCP 20, along with P1534(8)020 and 224-2770.020.
