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Chevrolet 12550909 Valve, Exhaust

1982-2014 Chevrolet

Customer Questions & Expert Answers (11)
GM 12550909 Valve, Exhaust
  • Part Description
    VALVE, Exhaust
  • Replaced By
    19435238
  • Manufacturer
    General Motors
Make sure this part fits
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  • Related Parts
  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers
  • Product Specifications

    BrandGenuine Chevrolet
    Manufacturer Part Number12550909
    Part DescriptionVALVE, Exhaust
    Other NamesExhaust Valve, Valve
    Item Dimensions5.3 x 2.2 x 2.2 inches
    Item Weight0.60 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU12550909
    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
    2002-2005, 1996-1998, 1985-1992 Chevrolet Astro6 Cyl 4.3LVAN ASTRO
    1996-2005, 1992-1994, 1985-1988 Chevrolet Blazer6 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L1/2 TON, 2 DOOR, 4 DOOR
    1985-1986 Chevrolet C106 Cyl 4.3LREGULAR CAB LONG BOX, REGULAR CAB STANDARD BOX
    1988-1999 Chevrolet C15006 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7LC1500 EXTENDED CAB LONG BOX, C1500 EXTENDED CAB STANDARD BOX, C1500 REGULAR CAB LONG BOX, C1500 REGULAR CAB STANDARD BOX
    1985-1986 Chevrolet C206 Cyl 4.3LCREW CAB, REGULAR CAB
    1988-1999 Chevrolet C25006 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7LC2500 CREW CAB, C2500 EXTENDED CAB LONG BOX, C2500 EXTENDED CAB STANDARD BOX, C2500 REGULAR CAB
    1985-1986 Chevrolet C30CAB CHASSIS 135.5, CAB CHASSIS 159.9, CREW CAB, REGULAR CAB
    1996-1999, 1988-1991 Chevrolet C35008 Cyl 5.7LC3500 CAB CHASSIS 135.5, C3500 CAB CHASSIS 159.9, C3500 CAB CHASSIS 183.5, C3500 CREW CAB LONG WHEELBASE, C3500 CREW CAB SHORT WHEELBASE, C3500 EXTENDED CAB, C3500 REGULAR CAB
    1994-1997, 1982-1992 Chevrolet Camaro8 Cyl 5.0L, 8 Cyl 5.7L2 DOOR, 4 DOOR, CONVERTIBLE, RS 2 DOOR, RS CONVERTIBLE
    1982-1996 Chevrolet Caprice6 Cyl 3.8L, 6 Cyl 4.3L, 8 Cyl 4.3L, 8 Cyl 4.4L, 8 Cyl 5.0L, 8 Cyl 5.7L4 DOOR, BROUGHAM 4 DOOR, CLASSIC 2 DOOR, CLASSIC 4 DOOR, CLASSIC LS 4 DOOR, CLASSIC STATION WAGON, LS 4 DOOR, STATION WAGON
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  • 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 12550909 fits your vehicle.
    Posted by GMPartsGiant Specialist
    Q:
    Is a Exhaust Valve and Intake Valve job best handled by a professional due to the complex nature of the job and specialized tools required on Chevrolet Astro? Posted by Customer
    A:
    Because of the extent of its procedure and the miscellaneous instruments and machineries that are essential for it, performing some valve operations that include servicing of the valves, as well as the valve seats, and guides is better implemented by a professional known as a valve job. It is in this way that a home mechanic can remove and disassemble each head, clean and inspect them before reassembling them to be forwarded to the dealer service department or an automotive machine shop for the true valve servicing. The dealer service department or automotive machine shop will have to take out the valves and springs, to recondition or replace the valves and valve seats, they will also have to recondition the valve guides then examine and replace the valve springs, spring retainers or rotators and keepers as required, replace the valve seals with new ones, replace or reinstall the valves and guarantee correct installed spring height. Also, any surface of the cylinder head gasket will be machined where warped. As far as head is concerned once the valve job is done by a professional it will be as good as new can be. These surfaces need another cleaning after its return also to ensure that there are no more tiny metal particles and abrasive grit.Also there would be additional cleaning to this head before using it on the engine so as to get rid of all these particles that were removed during the valve service or head resurfacing. Oil, oil mist galleries or oil paths can be blown through with compressed air; installed spring height is to be checked if correct.
    Posted by GMPartsGiant Specialist
    Q:
    What is the best way to handle the servicing of Exhaust Valve and Intake Valve, valve seats, and valve guides on Chevrolet C1500? Posted by Customer
    A:
    When servicing valves, valve seats and valve guides-popularly termed as valve jobs-due to the delicate nature of the task and its specific tools and equipment, it is best when done by professional people. If doing a home mechanic work, the heads can be taken apart and reassembled, initially cleaned and inspected and then delivered to a dealer service department or an automotive machine shop for actual valve servicing. The valves and springs will be removed by either a dealer service department or an automotive machine shop who will also either recondition or replace the valves and valve seats. The valve guides will also be reconditioned; there would be checking of spring height during assembly on reassembly of the cylinder head, replacing of spring retainers or rotators replacing keepers as required, putting in new valve seals, putting together the rest of the valve parts and checking whether installed spring height is correct. In addition to that, if necking is needed on its warped surface, it may also need surfacing at this time. A professional should perform this step because in case anything goes wrong with his hands it should be his responsibility as opposed to an ameuter who will blame it on fate or bad luck. When the professional is through with doing a valve job, you'll have your head back almost new. Afterward rinse off all traces of metal particles produced from the grinding action during machining operations as well sand bar grit from contact with any grinding wheel feeds using carbide cutters which must have been used in refacing the face of combustion chambers which had gotten dirty by carbon deposits.
    Posted by GMPartsGiant Specialist
    Q:
    Is a professional the best choice for handling a Exhaust Valve and Intake Valve job due to the complexity and specialized tools required on Chevrolet Blazer? Posted by Customer
    A:
    Because of the need to perform extensive work on the valves, valve seats and valve guides, often referred to as the 'valve job', it is advisable to seek the services of a professional technician since the job calls for proper alignment and use of some specific tools and equipment. A home mechanic can take off the head, scrape, clean as well as assess the valves, then reinstall the head and bring or take the head to a dealer service department or an automotive machine shop for the real servicing of the valves. Some of the duties of the dealer service department or the automotive machine shop will include the removal of the valves and the springs, the reconditioning and or replacement of the valves and valve seats, the inspection, reconditioning, and replacement of the valve guides, the checking and replacement of the valve springs, the spring retainers, the keepers as may be deemed necessary, the replacement of the valve seals with new ones and the reassembly of If the surface of the cylinder head gasket is twisted then it is also refinished. After the valve job is accomplished by the professional the head will be in good condition as if it was when it was new. On its return it should be again washed to remove all the particles of metal and other abrasive materials which could be left following the valve service or the process of milling or facing of the head and if possible all the oil holes and passages should be blown with air.
    Posted by GMPartsGiant Specialist
    Q:
    What is the best way to handle the servicing of Exhaust Valve and Intake Valve, valve seats, and valve guides on Chevrolet K1500? Posted by Customer
    A:
    When servicing valves, valve seats and valve guides-popularly termed as valve jobs-due to the delicate nature of the task and its specific tools and equipment, it is best when done by professional people. If doing a home mechanic work, the heads can be taken apart and reassembled, initially cleaned and inspected and then delivered to a dealer service department or an automotive machine shop for actual valve servicing. The valves and springs will be removed by either a dealer service department or an automotive machine shop who will also either recondition or replace the valves and valve seats. The valve guides will also be reconditioned; there would be checking of spring height during assembly on reassembly of the cylinder head, replacing of spring retainers or rotators replacing keepers as required, putting in new valve seals, putting together the rest of the valve parts and checking whether installed spring height is correct. In addition to that, if necking is needed on its warped surface, it may also need surfacing at this time. A professional should perform this step because in case anything goes wrong with his hands it should be his responsibility as opposed to an ameuter who will blame it on fate or bad luck. When the professional is through with doing a valve job, you'll have your head back almost new. Afterward rinse off all traces of metal particles produced from the grinding action during machining operations as well sand bar grit from contact with any grinding wheel feeds using carbide cutters which must have been used in refacing the face of combustion chambers which had gotten dirty by carbon deposits.
    Posted by GMPartsGiant Specialist
    Q:
    Is a professional the best choice for handling a Exhaust Valve and Intake Valve job due to the complexity and specialized tools required on Chevrolet S10? Posted by Customer
    A:
    Because of the need to perform extensive work on the valves, valve seats and valve guides, often referred to as the 'valve job', it is advisable to seek the services of a professional technician since the job calls for proper alignment and use of some specific tools and equipment. A home mechanic can take off the head, scrape, clean as well as assess the valves, then reinstall the head and bring or take the head to a dealer service department or an automotive machine shop for the real servicing of the valves. Some of the duties of the dealer service department or the automotive machine shop will include the removal of the valves and the springs, the reconditioning and or replacement of the valves and valve seats, the inspection, reconditioning, and replacement of the valve guides, the checking and replacement of the valve springs, the spring retainers, the keepers as may be deemed necessary, the replacement of the valve seals with new ones and the reassembly of If the surface of the cylinder head gasket is twisted then it is also refinished. After the valve job is accomplished by the professional the head will be in good condition as if it was when it was new. On its return it should be again washed to remove all the particles of metal and other abrasive materials which could be left following the valve service or the process of milling or facing of the head and if possible all the oil holes and passages should be blown with air.
    Posted by GMPartsGiant Specialist
    Q:
    Is servicing Exhaust Valve and Intake Valve, valve seats, and valve guides best handled by a professional on Pontiac Firebird? Posted by Customer
    A:
    Because of the challenge involved and the kind of equipment needed to work on the valves, the valve seats, and the valve guides it is advisable to engage the services of a professional. Home mechanic can take off and unbolt the head, perform rudimentary thorough washing and examination of the head and then he/she can present it to a dealer service department, or to a professional automotive machine shop for the actual valve servicing. The service department or the machine shop will have to have to strip the valves and springs, recondition or replace according to the need, inspect and replace the valve springs as contained in the specification, also replace the retainers, rotators and keepers if need be, replace the valve seals, reassemble the part and finally correctly set the installed spring height. Further, Cylinder head gasket surface will be grind as well if it is warped. That is always the case after performing the valve job, and the head will be almost as good as new. It should be washed before being placed in the head on the engine so as to purge it of any metal chips and sand that may be left behind during the service or after resurfacing. Compressed air should be utilised, if available, to blow out all oil holes and passages.
    Posted by GMPartsGiant Specialist
    Q:
    Is a professional the best choice for handling a Exhaust Valve and Intake Valve job due to the complexity and specialized tools required on GMC Jimmy? Posted by Customer
    A:
    Because of the need to perform extensive work on the valves, valve seats and valve guides, often referred to as the 'valve job', it is advisable to seek the services of a professional technician since the job calls for proper alignment and use of some specific tools and equipment. A home mechanic can take off the head, scrape, clean as well as assess the valves, then reinstall the head and bring or take the head to a dealer service department or an automotive machine shop for the real servicing of the valves. Some of the duties of the dealer service department or the automotive machine shop will include the removal of the valves and the springs, the reconditioning and or replacement of the valves and valve seats, the inspection, reconditioning, and replacement of the valve guides, the checking and replacement of the valve springs, the spring retainers, the keepers as may be deemed necessary, the replacement of the valve seals with new ones and the reassembly of If the surface of the cylinder head gasket is twisted then it is also refinished. After the valve job is accomplished by the professional the head will be in good condition as if it was when it was new. On its return it should be again washed to remove all the particles of metal and other abrasive materials which could be left following the valve service or the process of milling or facing of the head and if possible all the oil holes and passages should be blown with air.
    Posted by GMPartsGiant Specialist
    Q:
    Is a professional the best choice for handling a Exhaust Valve and Intake Valve job due to the complexity and specialized tools required on GMC Sonoma? Posted by Customer
    A:
    Because of the need to perform extensive work on the valves, valve seats and valve guides, often referred to as the 'valve job', it is advisable to seek the services of a professional technician since the job calls for proper alignment and use of some specific tools and equipment. A home mechanic can take off the head, scrape, clean as well as assess the valves, then reinstall the head and bring or take the head to a dealer service department or an automotive machine shop for the real servicing of the valves. Some of the duties of the dealer service department or the automotive machine shop will include the removal of the valves and the springs, the reconditioning and or replacement of the valves and valve seats, the inspection, reconditioning, and replacement of the valve guides, the checking and replacement of the valve springs, the spring retainers, the keepers as may be deemed necessary, the replacement of the valve seals with new ones and the reassembly of If the surface of the cylinder head gasket is twisted then it is also refinished. After the valve job is accomplished by the professional the head will be in good condition as if it was when it was new. On its return it should be again washed to remove all the particles of metal and other abrasive materials which could be left following the valve service or the process of milling or facing of the head and if possible all the oil holes and passages should be blown with air.
    Posted by GMPartsGiant Specialist
    Q:
    What is the consequence of refacing the valve if it reduces the edge of the valve head for the 1986 Chevrolet Caprice? Posted by Customer
    A:
    If the refacing of the valve reduces the edge of the valve head to less than the specified width, the valve must be replaced.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Exhaust Valve
    Q:
    What should be done if significant pitting or burning is present for the 1982 Chevrolet El Camino? Posted by Customer
    A:
    If significant pitting or burning is present, the valve should be refaced by a dealer and the seat recut; if refacing reduces the valve head edge to below specified limits, replacement is necessary.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Exhaust Valve
    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 12550909, the Right Choice

To ensure reliability, purchase GM part # 12550909 Valve, Exhaust. It is sometimes referred to as Chevrolet Exhaust Valve. 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 Chevrolet Camaro, Silverado, Tahoe models.

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