What steps must be taken to prepare piston/connecting rod assemblies for inspection on Pontiac Grand Prix?

The inspection process cannot be performed on the piston/connecting rod assemblies unless cleaned and fitted with new rings as the originals are replaced as part of the procedure. Taking considerable care, remove the piston rings with the aid of a piston ring installation tool that does not mar the faces of the rings in any way. After most deposits have been removed, use a junkyard handheld wire brush or fine emery cloth to scrape a thin layer of carbon from the top of the piston in order to get a shiny surface, do not use wire brush mounted in a drill motor as this will erode the top of the piston which is made of soft material. When the carbonaceous deposits are to be removed from the ring grooves piston ring groove cleaning tool should be used, or a piece remove from the old ring may be used provided no portion of the metal or the grooves are removed in the process. The deposits should then be washed off with solvent and if there is available compressed air, then dry the piston/rod assemblies. That only applies if the pistons and cylinder walls are not damaged and the engine block has not been rebored; new pistons are in most often not needed, but new piston rings are always essential during the rebuild. The pistons should be thoroughly checked for ring travel for cracks round the skirt, pin bosses and ring lands and for scores, scratches, holes at the piston crown, and burned areas, because these indicate overheating or abnormal combustion are signs and should lead to a check of the cooling and lubrication system. Pitting is corrosion, which in this case can be attributed to leakage of coolants into the combustion chamber or crankcase and should therefore be investigated in order to avoid such in the rebuilt engines. Check the piston ring side clearance with a new piston ring placed in every groove, using the thin feeler gauge and do it at different points along the groove; always fit the right ring to the groove. The clearance between a piston and bore must also be correct with some standard measurement depending on the type of engine; the engineer must compare the bore of the cylinder and the diameter of the piston. Clearance is obtained from the difference of the bore diameter and piston diameter; if it is off the standard, rebore the block and get new pistons as well as rings. It is advisable to twist the piston and the rod and if there is considerable play then it is a sign that they are worn out and would need adjustment in most cases they will need to be resized in an automotive machine shop and new pins fitted. In the case when pistons are to be separated from the connecting rods, they should be taken to an automotive machine shop to check for bend and twist and in general, measuring should be done with special equipment and disassembling should be avoided where not necessary due to fitting of new components.

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 to prepare piston/connecting rod assemblies for inspection on Pontiac Grand Prix?
A: The inspection process cannot be performed on the piston/connecting rod assemblies unless cleaned and fitted with new rings as the originals are replaced as part of the procedure. Taking considerable care, remove the Piston Rings with the aid of a piston ring installation tool that does not mar the faces of the rings in any way. After most deposits have been removed, use a junkyard handheld wire brush or fine emery cloth to scrape a thin layer of carbon from the top of the piston in order to get a shiny surface, do not use wire brush mounted in a drill motor as this will erode the top of the piston which is made of soft material. When the carbonaceous deposits are to be removed from the ring grooves piston ring groove cleaning tool should be used, or a piece remove from the old ring may be used provided no portion of the metal or the grooves are removed in the process. The deposits should then be washed off with solvent and if there is available compressed air, then dry the piston/rod assemblies. That only applies if the pistons and cylinder walls are not damaged and the engine block has not been rebored; new pistons are in most often not needed, but new piston rings are always essential during the rebuild. The pistons should be thoroughly checked for ring travel for cracks round the skirt, pin bosses and ring lands and for scores, scratches, holes at the piston crown, and burned areas, because these indicate overheating or abnormal combustion are signs and should lead to a check of the cooling and lubrication system. Pitting is corrosion, which in this case can be attributed to leakage of coolants into the combustion chamber or crankcase and should therefore be investigated in order to avoid such in the rebuilt engines. Check the piston ring side clearance with a new piston ring placed in every groove, using the thin feeler gauge and do it at different points along the groove; always fit the right ring to the groove. The clearance between a piston and bore must also be correct with some standard measurement depending on the type of engine; the engineer must compare the bore of the cylinder and the diameter of the piston. Clearance is obtained from the difference of the bore diameter and piston diameter; if it is off the standard, rebore the block and get new pistons as well as rings. It is advisable to twist the piston and the rod and if there is considerable play then it is a sign that they are worn out and would need adjustment in most cases they will need to be resized in an automotive machine shop and new pins fitted. In the case when pistons are to be separated from the connecting rods, they should be taken to an automotive machine shop to check for bend and twist and in general, measuring should be done with special equipment and disassembling should be avoided where not necessary due to fitting of new components.