What steps must be taken before removing the piston and connecting rod assemblies on Pontiac Grand Prix?

Prior to removing the piston and connecting rod assemblies, the cylinder head(s), oil pan, and oil pump must be taken off, depending on the engine type. First, use your fingernail to check for any ridges at the upper limit of ring travel, which is about 1/4-inch down from the top of each cylinder. If ridges are present due to carbon deposits or cylinder wear, they must be completely removed with a ridge reamer before attempting to remove the pistons to avoid breakage. After removing the cylinder ridges, turn the engine upside-down with the crankshaft facing up. Before removing the connecting rods, check the endplay using feeler gauges; if the endplay exceeds the service limit, new connecting rods may be necessary. Ensure the connecting rods and caps are marked for identification, and if not, use a center-punch to create indentations. Loosen the connecting rod cap nuts gradually until they can be removed by hand, then take off the number one connecting rod cap and bearing insert without dropping the insert. To protect the crankshaft journal and cylinder wall during piston removal, slip a short length of plastic or rubber hose over each connecting rod cap bolt. Remove the bearing insert and push the connecting rod/piston assembly out through the top of the engine, using a wooden or plastic hammer handle if needed. Repeat this process for the remaining cylinders. After removal, reassemble the connecting rod caps and bearing inserts in their respective rods and install the cap nuts finger tight to prevent damage to the bearing surfaces. It is important not to separate the pistons from the connecting rods.

Genuine Pontiac Grand Prix Piston

Engine Pistons

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24 Pistons found

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Pontiac Grand Prix Piston Asm,(W/ Pinion)
Part Number: 89060486
$39.67 MSRP: $65.67
You Save: $26.00 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: PISTON, Engine Piston; Piston
- Replaces: 89017577
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2008 Pontiac Grand Prix | 4 DOOR, GT 4 DOOR, GT2 4 DOOR, GTP 4 DOOR, GXP 4 DOOR | 8 Cyl 5.3L
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Pontiac Grand Prix Piston Asm,(W/ Pinion)
Part Number: 89060483
$144.44 MSRP: $198.60
You Save: $54.16 (28%)
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Product Specifications
- Other Name: PISTON, Engine Piston; Piston
- Replaces: 89017578
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2008 Pontiac Grand Prix | 4 DOOR, GT 4 DOOR, GT2 4 DOOR, GTP 4 DOOR, GXP 4 DOOR | 8 Cyl 5.3L
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Pontiac Grand Prix Pstn & Piston Pinion Asm
Part Number: 14102688
$54.38 MSRP: $109.66
You Save: $55.28 (51%)
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Product Specifications
- Other Name: PISTON, Engine Piston; Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1989 Pontiac Grand Prix | 2 DOOR, LE 2 DOOR, SE 2 DOOR | 6 Cyl 2.8L
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Pontiac Grand Prix Piston Asm,(W/ Pinion)
Part Number: 24505806
$60.44 MSRP: $121.88
You Save: $61.44 (51%)
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Product Specifications
- Other Name: PISTON, Engine Piston; Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, SE 2 DOOR, SE 4 DOOR | 6 Cyl 3.1L
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Pontiac Grand Prix Piston, (W/Pinion)
Part Number: 12539085
$104.07 MSRP: $163.76
You Save: $59.69 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: PISTON, Engine Piston; Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2007 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, GT 4 DOOR, GT2 4 DOOR, GTP 2 DOOR, GTP 4 DOOR, GXP 4 DOOR, SE 4 DOOR | 6 Cyl 3.8L
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Pontiac Grand Prix Piston Asm,(W/ Pinion)(0.020" Oversize)
Part Number: 12539086
$43.95 MSRP: $279.78
You Save: $235.83 (85%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: PISTON, Engine Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2007 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, GT 4 DOOR, GT2 4 DOOR, GTP 2 DOOR, GTP 4 DOOR, GXP 4 DOOR, SE 4 DOOR | 6 Cyl 3.8L
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Pontiac Grand Prix Piston Asm,(W/ Pinion)
Part Number: 24508726
Product Specifications
- Other Name: PISTON, Engine Piston; Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-1999 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, GT 4 DOOR, GTP 2 DOOR, GTP 4 DOOR, SE 2 DOOR, SE 4 DOOR | 6 Cyl 3.1L
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Pontiac Grand Prix Piston Assembly, (W/ Pinion, Std)
Part Number: 24505686
Product Specifications
- Other Name: PISTON, Engine Piston; Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-1996 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, LE 2 DOOR, LE 4 DOOR, SE 2 DOOR, SE 4 DOOR, STE 4 DOOR | 6 Cyl 3.4L
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Pontiac Grand Prix Piston Asm,(W/ Pinion) (0.5Mm Oversize)
Part Number: 12481320
Product Specifications
- Other Name: PISTON, Engine Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000-2003 Pontiac Grand Prix | SE 4 DOOR | 6 Cyl 3.1L
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Pontiac Grand Prix Piston Assembly,(W/ Pinion, Std Size)
Part Number: 19299371
Product Specifications
- Other Name: PISTON, Engine Piston; Piston
- Replaces: 12537408, 89017810
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2008 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, GT 4 DOOR, GT2 4 DOOR, GTP 2 DOOR, GTP 4 DOOR, GXP 4 DOOR, SE 4 DOOR | 6 Cyl 3.8L
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Pontiac Grand Prix Piston, W/Pinion(Std High, Limit)
Part Number: 25527178
Product Specifications
- Other Name: PISTON, Engine Piston; Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1987 Pontiac Grand Prix | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, LE 2 DOOR, STATION WAGON | 6 Cyl 3.8L, 6 Cyl 4.1L
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Pontiac Grand Prix Piston Assembly, W/ Pinion (0.5M Oversize)
Part Number: 24504503
Product Specifications
- Other Name: PISTON, Engine Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-1998 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, GT 4 DOOR, SE 2 DOOR, SE 4 DOOR | 6 Cyl 3.1L
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Pontiac Grand Prix Pistin,W/Pinion Engine(Std)
Part Number: 22548435
Product Specifications
- Other Name: PISTON, Engine Piston; Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1990-1991 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, LE 2 DOOR, SE 2 DOOR, SE 4 DOOR, STE 4 DOOR | 4 Cyl 2.3L
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Pontiac Grand Prix Piston Assembly, W/Pinion(0.5 Mm Oversize)
Part Number: 10208893
Product Specifications
- Other Name: PISTON, Engine Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, SE 2 DOOR, SE 4 DOOR | 6 Cyl 3.1L
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Pontiac Grand Prix Piston Assembly, W/Pinion(1.0 Mm Oversize)
Part Number: 10208894
Product Specifications
- Other Name: PISTON, Engine Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, SE 2 DOOR, SE 4 DOOR | 6 Cyl 3.1L
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Pontiac Grand Prix Piston & Pinion Asm(.04Mm Oversize)
Part Number: 10100061
Product Specifications
- Other Name: PISTON, Engine Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1990-1993 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, LE 2 DOOR, LE 4 DOOR, SE 2 DOOR, SE 4 DOOR, STE 4 DOOR | 6 Cyl 3.1L
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Pontiac Grand Prix Piston & Pinion Asm(0.5Mm Oversize)
Part Number: 10100062
Product Specifications
- Other Name: PISTON, Engine Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1990-1993 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, LE 2 DOOR, LE 4 DOOR, SE 2 DOOR, SE 4 DOOR, STE 4 DOOR | 6 Cyl 3.1L
View related parts
Pontiac Grand Prix Piston Asm
Part Number: 10070183
Product Specifications
- Other Name: PISTON, Engine Piston; Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1989-1993 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, LE 2 DOOR, LE 4 DOOR, SE 2 DOOR, SE 4 DOOR, STE 4 DOOR | 6 Cyl 3.1L
View related parts
Pontiac Grand Prix Piston & Pinion Asm(1.0Mm Oversize)
Part Number: 10100063
Product Specifications
- Other Name: PISTON, Engine Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1990-1993 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, LE 2 DOOR, LE 4 DOOR, SE 2 DOOR, SE 4 DOOR, STE 4 DOOR | 6 Cyl 3.1L
View related parts
Pontiac Grand Prix Piston Asm,(W/ Pinion)(0.5 Mm Oversize)
Part Number: 89017421
Product Specifications
- Other Name: PISTON, Engine Piston
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-1999 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, GT 4 DOOR, GTP 2 DOOR, GTP 4 DOOR, SE 2 DOOR, SE 4 DOOR | 6 Cyl 3.1L

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1-20 of 24 Results

Pontiac Grand Prix Piston

The Piston in Pontiac Grand Prix vehicles is one of the vital part of the internal combustion engine that facilitates the conversion of combustion power into the energy which is needed for the movement of the vehicle. With efficiency in the force transfer of expanding gases to the crankshaft, the Piston is premier suited to improve engine performance. Mainly made out of aluminum alloys and because of their application in the automobile industry, Pontiac Grand Prix Pistons use forged or billet designs in race cars. Various types of Pistons have been used in the series of Pontiac Grand Prix throughout the years including trunk pistons for Petrol and Diesel engines and side forces and oil rings. Besides, there are slipper pistons which are applied in high-speed petrol engines to improve the balance and performance. Crosshead and deflector pistons are available to meet the requirements of users in order that the Pontiac Grand Prix offer the stability and power users wish for.

Each OEM Pontiac Grand Prix Piston we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

Pontiac Grand Prix Piston Parts Questions & Experts Answers

Piston, (W/Pinion)
12539085
Q: What steps must be taken before removing the piston and connecting rod assemblies on Pontiac Grand Prix?
A: Prior to removing the piston and connecting rod assemblies, the cylinder head(s), oil pan, and oil pump must be taken off, depending on the engine type. First, use your fingernail to check for any ridges at the upper limit of ring travel, which is about 1/4-inch down from the top of each cylinder. If ridges are present due to carbon deposits or cylinder wear, they must be completely removed with a ridge reamer before attempting to remove the pistons to avoid breakage. After removing the cylinder ridges, turn the engine upside-down with the Crankshaft facing up. Before removing the connecting rods, check the endplay using feeler gauges; if the endplay exceeds the service limit, new connecting rods may be necessary. Ensure the connecting rods and caps are marked for identification, and if not, use a center-punch to create indentations. Loosen the connecting rod cap nuts gradually until they can be removed by hand, then take off the number one connecting rod cap and bearing insert without dropping the insert. To protect the crankshaft journal and cylinder wall during piston removal, slip a short length of plastic or rubber hose over each connecting rod cap bolt. Remove the bearing insert and push the connecting rod/piston assembly out through the top of the engine, using a wooden or plastic hammer handle if needed. Repeat this process for the remaining cylinders. After removal, reassemble the connecting rod caps and bearing inserts in their respective rods and install the cap nuts finger tight to prevent damage to the bearing surfaces. It is important not to separate the pistons from the connecting rods.