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GMC 23500117 Cylinder Head

1985-1991 GMC

Customer Questions & Expert Answers (9)
GM 23500117 Cylinder Head
  • Part Description
    Head,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
  • Product Specifications

    BrandGenuine GMC
    Manufacturer Part Number23500117
    Part DescriptionHead,Cyl
    Item Dimensions9.1 x 5.8 x 25.2 inches
    Item Weight63.90 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU23500117
    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
    1988-1991, 1985-1986 GMC C15008 Cyl 6.2L DieselC1500 EXTENDED CAB LONG BOX, C1500 EXTENDED CAB STANDARD BOX, C1500 REGULAR CAB LONG BOX, C1500 REGULAR CAB STANDARD BOX, REGULAR CAB LONG BOX, REGULAR CAB STANDARD BOX
    1988-1991, 1985-1986 GMC C25008 Cyl 6.2L DieselC2500 EXTENDED CAB LONG BOX, C2500 EXTENDED CAB STANDARD BOX, C2500 REGULAR CAB, CREW CAB, REGULAR CAB
    1988-1991, 1985-1986 GMC C35008 Cyl 6.2L DieselC3500 CAB CHASSIS 135.5, C3500 CAB CHASSIS 159.9, C3500 CAB CHASSIS 183.5, C3500 EXTENDED CAB, C3500 REGULAR CAB, CAB CHASSIS 135.5, CAB CHASSIS 159.9, CREW CAB, REGULAR CAB
    1985-1991 GMC G15001/2 TON CARGO, 1/2 TON PASSENGER
    1985-1991 GMC G25008 Cyl 6.2L Diesel1/2 TON CARGO, 1/2 TON PASSENGER, 3/4 TON CARGO, 3/4 TON PASSENGER
    1985-1991 GMC G35008 Cyl 6.2L Diesel1 TON CARGO, 1 TON COMMERCIAL/RECREATIONAL VEHICLE, 1 TON PASSENGER
    1985-1991 GMC Jimmy8 Cyl 6.2L Diesel1/2 TON
    1988-1991, 1985-1986 GMC K15008 Cyl 6.2L DieselK1500 EXTENDED CAB LONG BOX, K1500 EXTENDED CAB STANDARD BOX, K1500 REGULAR CAB LONG BOX, K1500 REGULAR CAB STANDARD BOX, REGULAR CAB LONG BOX, REGULAR CAB STANDARD BOX
    1988-1991, 1985-1986 GMC K25008 Cyl 6.2L DieselK2500 EXTENDED CAB LONG BOX, K2500 EXTENDED CAB STANDARD BOX, K2500 REGULAR CAB, REGULAR CAB
    1988-1991, 1985-1986 GMC K35008 Cyl 6.2L DieselCAB CHASSIS 135.5, CAB CHASSIS 159.9, CREW CAB, K3500 CAB CHASSIS 135.5, K3500 CAB CHASSIS 159.9, K3500 EXTENDED CAB, K3500 REGULAR CAB, REGULAR CAB
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  • Customer Questions & Expert Answers

    Q:
    I would like to confirm if this is the correct part number for my vehicle. Please advise. Thank you. Posted by GMPartsGiant Specialist
    A:
    You can Select Your Vehicle to check if 23500117 fits your vehicle.
    Posted by GMPartsGiant Specialist
    Q:
    How to reassemble the heads and ensuring they are clean? Posted by Customer
    A:
    Do not assume that the heads are clean enough for reassembly just because they were serviced by a valve machine shop. Start by greasing up and putting in the first valve, apply moly-base grease or clean engine oil to the valve stem. In such cases, there are three types of valve stem oil seals, depending on the year, size and model of the engine; a small O-ring around the valve stem above the guide boss; a flat O-ring in a groove below the valve stem keeper groove; or an umbrella-type seal that extends over the valve guide. Make sure new valve stem seals-especially round O-ring or umbrella types-are seated properly over each top of their respective valve guides. Drop these spring seats or shims over each guide and then set the valve spring(s), shield, and retainer (or rotator) into place. Using a valve spring compressor compress springs before positioning with lower groove seal only if it is a flat o-ring ensure it is lying flat without any twist to it. Put keepers in place at upper groove after releasing compressor making sure they really seat properly. These keepers can be stuck with grease if necessary. Take care not to mix up parts when doing other valves in this manner. After having placed all of your valves in both heads, check these vacuum pump operated special adapters for leaking on each head's O ring seals which can be done by either service department, repair shop or automotive machine shop. The adapter should be attached to every valve retainer or rotator while vacuumed using hand pump upon them. If vacuum cannot be maintained, it indicates a leaking seal that must be checked and replaced before installing the head on the engine. Now measure installed spring height using either ruler or dial caliper ensuring it meets specified height measurements accordingly. However, this measurement should be accurate if servicing was done elsewhere but it's better to check again-it is essential though. You should measure the distance from the top of each spring seat or shims to the top of oil shield or bottom of retainer/rotator which are the same points. In case this height is more than prescribed, add shims under springs to bring it down with precautions not to lower it below. From here, apply moly-base grease on both rocker arm faces and pivot balls then install rocker arms and pivots on cylinder head studs threading the nuts just a few times.
    Posted by GMPartsGiant Specialist
    Q:
    What is the recommended approach for loosening the head bolts for the 1993 Chevrolet C1500? Posted by Customer
    A:
    Loosen the head bolts in 1/4-turn increments until they can be removed by hand, working in a reverse pattern of the tightening sequence. Store the bolts in the cardboard holder to retain their original positions.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What should be done before removing the valves for the 1995 Chevrolet C1500? Posted by Customer
    A:
    Before removing the valves, it is important to label and store them, along with their related components, so they can be kept separate and reinstalled in the same valve guides they are removed from.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What should be done if the valve components are in poor condition for the 1998 Chevrolet C1500? Posted by Customer
    A:
    If the valve components are in poor condition, reassemble them in the cylinder head.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What is the first step before reassembling the cylinder heads for the 1996 Chevrolet C1500? Posted by Customer
    A:
    The first step is to ensure the heads are clean before reassembly, regardless of whether they underwent valve servicing at an automotive machine shop.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What is important to consider when purchasing a set of reconditioned cylinder heads for the 1999 Chevrolet K1500? Posted by Customer
    A:
    When purchasing a set of reconditioned cylinder heads, it is important to ensure that the new heads match the combustion chamber design of the originals.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    How can heavy deposits be removed from the valves for the 1997 Chevrolet K1500? Posted by Customer
    A:
    Scrape off heavy deposits from the valves and use a motorized wire brush to remove deposits from the valve heads and stems.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    How should the head bolts be torqued during installation for the 1996 Chevrolet K1500? Posted by Customer
    A:
    Follow the recommended tightening sequence, gradually torquing the bolts to the specified torque.
    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 23500117, the Right Choice

To ensure reliability, purchase GM part # 23500117 Cylinder Head. 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 C2500, K1500, Suburban models.

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