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Pontiac 10070145 Piston Assembly

1990-1992 Pontiac Firebird

Customer Questions & Expert Answers (3)
10070145 GM Piston Assembly 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 Pontiac
    Manufacturer Part Number10070145
    Part DescriptionPISTON, Engine Piston
    Other NamesPiston
    Item Dimensions4.6 x 4.3 x 4.2 inches
    Item Weight1.30 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Require Quantity6
    ManufacturerGeneral Motors
    SKU10070145
    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
    1990-1992 Pontiac Firebird6 Cyl 3.1L2 DOOR, CONVERTIBLE
  • Customer Questions & Expert Answers

    Q:
    I'm wondering if this is complete and correct part for my vehicle.
    A:
    You can Select Your Vehicle to check if 10070145 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    What is the procedure for loosening the connecting rod cap nuts for the Piston in the 1992 Pontiac Firebird? Posted by Striko S.
    A:
    Loosen each connecting rod cap nut about half a turn, then remove the number one connecting rod cap and bearing insert without dropping the insert. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Henry / Mar 26, 2026
    Q:
    How is Piston ring side clearance measured for the 1991 Pontiac Firebird? Posted by Mack G.
    A:
    Measure the piston ring side clearance using a new piston ring and a feeler gauge, checking at multiple locations around each groove, and ensure the correct ring is used for each groove. Excessive clearance may require new pistons or rings. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Bob / Feb 25, 2025

Genuine GM Part 10070145, the Right Choice

To ensure reliability, purchase GM part # 10070145 Piston Assembly. It is sometimes referred to as Pontiac 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 Pontiac Firebird models.

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