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GMC 12360340 Cylinder Head Kit

1987-1990 GMC

Customer Questions & Expert Answers (20)
GM 12360340 Cylinder Head Kit
GM 12360340 Cylinder Head Kit
  • Part Description
    Head Kit,Cyl
  • Manufacturer
    General Motors
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers

  • Related Parts

    Shop for related parts for your vehicle

  • Product Specifications

    BrandGenuine GMC
    Manufacturer Part Number12360340
    Part DescriptionHead Kit,Cyl
    Other NamesCylinder Head
    Item Dimensions22.8 x 8.7 x 4.6 inches
    Item Weight48.00 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU12360340
    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
    1987-1990 GMC S154 Cyl 2.5L2 DOOR, PICKUP
    1987-1989 GMC Safari4 Cyl 2.5LVAN SAFARI

  • Customer Questions & Expert Answers

    Q:
    I am wonder if this is complete and correct part for my vehicle. Posted by GMPartsGiant Specialist
    A:
    You can Select Your Vehicle to check if 12360340 fits your vehicle.
    Posted by GMPartsGiant Specialist
    Q:
    What is the recommended tightening procedure for the cylinder head bolts during installation for the 1986 Buick Century? Posted by Customer
    A:
    During installation, tighten the cylinder head bolts incrementally in the specified sequence to the final torque value as per the Torque Specifications chart.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What should be done after cleaning the area around the cylinder head for the 1988 Oldsmobile Cutlass? Posted by Customer
    A:
    Remove the rocker arm cover attaching bolts and lift the rocker arm cover off the cylinder head, breaking the gasket seal if necessary without prying on the sealing surfaces.
    Posted by GMPartsGiant Specialist
    Q:
    What should be done if the engine has been removed from the car for the 1997 Oldsmobile Cutlass? Posted by Customer
    A:
    If the engine has been removed from the car, the following instructions do not apply.
    Posted by GMPartsGiant Specialist
    Q:
    What is the procedure for removing the rocker arms and pushrods for the 2001 Chevrolet Astro? Posted by Customer
    A:
    Remove the valve covers, loosen the rocker arm fulcrum bolts to lift off the rocker arms, and remove the pushrods, storing them for reinstallation.
    Posted by GMPartsGiant Specialist
    Q:
    What should be done to the rocker arm faces and pivot balls before installation for the 1999 Chevrolet Astro? Posted by Customer
    A:
    Finally, apply moly-based grease to the rocker arm faces and pivot balls.
    Posted by GMPartsGiant Specialist
    Q:
    What is the first step in the removal process for the 2002 Chevrolet Astro? Posted by Customer
    A:
    The first step is to disconnect the negative cable from the battery and remove the engine cover, ensuring to disable the anti-theft feature if applicable.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What should be done to the coolant passages during the cleaning process for the 2002 Chevrolet Astro? Posted by Customer
    A:
    Remove built-up scale from the coolant passages and use a stiff wire brush to clear deposits from various holes.
    Posted by GMPartsGiant Specialist
    Q:
    What is the next step after removing and storing the valves and components for the 1987 Chevrolet Astro? Posted by Customer
    A:
    After removing and storing the valves and components, thoroughly clean and inspect the head, completing engine disassembly procedures if a complete overhaul is being performed before starting the cleaning and inspection process.
    Posted by GMPartsGiant Specialist
    Q:
    What should be checked after all valves are installed for the 1986 Pontiac Fiero? Posted by Customer
    A:
    Double-check the installed valve spring height; if it was correct before disassembly, it should still be within specified limits.
    Posted by GMPartsGiant Specialist
    Q:
    What is the next step after inserting the valve for the 1992 Oldsmobile Cutlass? Posted by Customer
    A:
    Assemble the valve spring assembly for that cylinder.
    Posted by GMPartsGiant Specialist
    Q:
    What is an alternative to purchasing new cylinder heads for the 1995 Oldsmobile Cutlass? Posted by Customer
    A:
    Alternatively, the complete cylinder heads can be taken to a competent automotive machine shop or GM dealership for the overhaul process, particularly if the complete engine is being overhauled simultaneously.
    Posted by GMPartsGiant Specialist
    Q:
    What precautions should be taken when cleaning the head gasket mating surface for the 1992 Oldsmobile Cutlass? Posted by Customer
    A:
    Clean all carbon deposits from the head gasket mating surface carefully to avoid scratching this sealing surface.
    Posted by GMPartsGiant Specialist
    Q:
    What should you do before lowering the cylinder head onto the engine for the 1983 Oldsmobile Cutlass? Posted by Customer
    A:
    Carefully lower the cylinder head onto the engine, ensuring the gasket remains in place.
    Posted by GMPartsGiant Specialist
    Q:
    How can stem-to-guide clearance be determined for the 1984 Pontiac Fiero? Posted by Customer
    A:
    A dial indicator can be used to determine stem-to-guide clearance by measuring lateral movement when the valve is lifted and moved side to side.
    Posted by GMPartsGiant Specialist
    Q:
    What electrical connections need to be disconnected for the 1985 Pontiac Fiero? Posted by Customer
    A:
    Disconnect the electrical connectors and radiator hose at the left end of the cylinder head, then remove the ground strap at the right end.
    Posted by GMPartsGiant Specialist
    Q:
    What should be inspected regarding the valve springs for the 1986 Oldsmobile Cutlass? Posted by Customer
    A:
    Inspect each valve spring and its damper, replacing any that are deformed, cracked, or broken.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What is the procedure for installing the pushrods for the 1985 Oldsmobile Cutlass? Posted by Customer
    A:
    Remove the pushrods from their numbered rack or cardboard and install them in their proper positions, locating each pushrod in its rocker arm seat by tilting the rocker arm toward it.
    Posted by GMPartsGiant Specialist
    Q:
    What should be done after raising the 1986 Pontiac Fiero? Posted by Customer
    A:
    Remove the engine block drain plug to drain the coolant.
    Posted by GMPartsGiant Specialist
    Q:
    How do you remove the keepers from the valve spring for the 1985 Pontiac Fiero? Posted by Customer
    A:
    Compress the valve spring with a spring compressor to remove the keepers, then carefully release the compressor and take out the retainer, shield, springs, valve guide seal, any spring seat shims, and the valve from the head.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    If you have any questions about this product, please don't hesitate to ask us. We will be happy to help you!

Genuine GM Part 12360340, the Right Choice

To ensure reliability, purchase GM part # 12360340 Cylinder Head Kit. It is sometimes referred to as GMC Cylinder Head. 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 GMC S15, Safari models.

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