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Oldsmobile 25527178 Piston, W/Pinion(Std High, Limit)

1982-1988 Oldsmobile

Customer Questions & Expert Answers (3)
25527178 GM Piston, W/Pinion(Std High, Limit) Illustration 1 of 1
  • Part Description
    PISTON, Engine Piston
  • Manufacturer
    General Motors
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine Oldsmobile
    Manufacturer Part Number25527178
    Part DescriptionPISTON, Engine Piston
    Other NamesPiston
    Item Dimensions4.8 x 4.5 x 4.4 inches
    Item Weight1.80 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU25527178
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    1985-1986, 1982-1983 Oldsmobile 986 Cyl 3.8L, 6 Cyl 4.1LREGENCY 2 DOOR, REGENCY 4 DOOR, REGENCY BROUGH 2 DOOR, REGENCY BROUGH 4 DOOR, REGENCY BROUGHAM
    1982-1985 Oldsmobile Custom Cruiser2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 4 DOOR, BROUGHAM LS 4 DOOR, RWD, STATION WAGON
    1982-1988 Oldsmobile Cutlass6 Cyl 3.8L2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 2 DOOR NOTCHBACK, BROUGHAM 4 DOOR, BROUGHAM SL 2 DOOR, BROUGHAM STATION WAGON, CUTLASS CALAIS, CUTLASS CRUISER, LS 2 DOOR, LS 2 DOOR NOTCHBACK, LS 4 DOOR, LS STATION WAGON, S 2 DOOR, STATION WAGON
    1982-1986 Oldsmobile Delta 886 Cyl 3.8L2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 4 DOOR, BROUGHAM LS 4 DOOR, RWD, STATION WAGON
    1986, 1982-1984 Oldsmobile Toronado6 Cyl 3.8L, 6 Cyl 4.1LBROUGHAM
  • Customer Questions & Expert Answers

    Q:
    I would like to confirm if this is the correct part number for my vehicle. Please advise. Thank you.
    A:
    You can Select Your Vehicle to check if 25527178 fits your vehicle.
    Posted and answered by GM Parts Specialist Henry
    Q:
    How can damage to the crankshaft or cylinder wall be prevented during Piston assembly removal for the 1982 Chevrolet El Camino? Posted by Ramo D.
    A:
    Cover the connecting rod studs with rubber or plastic tubing. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Jose / Nov 03, 2024
    Q:
    What should I check for before removing the Pistons for the 1987 Buick Century? Posted by Verified Customer
    A:
    Before removing the pistons, inspect the cylinder bore for a ridge, which can be felt by hand. If present, use a ridge reamer to carefully remove it. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Nicholas / Mar 11, 2026

Genuine GM Part 25527178, the Right Choice

To ensure reliability, purchase GM part # 25527178 Piston, W/Pinion(Std High, Limit). It is sometimes referred to as Oldsmobile Piston. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific Oldsmobile 98, Custom Cruiser, Cutlass models.

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