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GM 12621428
Valve Springs

2006-2015 GM

Customer Questions & Expert Answers (5)
GM 12621428 Valve Springs
GM 12621428 Valve Springs
  • Part Description
    Spring, Engine Valve; Valve Spring
  • Replaces
    12578457
  • Manufacturer
    General Motors
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  • Related Parts
  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers
  • Product Specifications

    BrandGenuine GM
    Manufacturer Part Number12621428
    Part DescriptionSpring, Engine Valve; Valve Spring
    Item Dimensions2.9 x 1.9 x 1.4 inches
    Item Weight0.50 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces12578457
    Require Quantity16
    ManufacturerGeneral Motors
    SKU12621428
    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 Trim Engine
    2014-2015 Chevrolet CamaroZ/288 Cyl 7.0 L GAS
    2006-2013 Chevrolet Corvette427, 427 Limited Edition Z06, Z06, Z06 Carbon8 Cyl 7.0 L GAS
  • Customer Questions & Expert Answers

    Q:
    Is this 12621428 designed for my car? Posted by ChevyPartsGiant Specialist
    A:
    Please Select Your Vehicle model to see if part number 12621428 is suitable before ordering.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Rocker Shaft Spring Kit and valve stem oil seal on Chevrolet Corvette? Posted by Customer
    A:
    Begin the Valve Stem Oil Seal and valve spring replacement by taking out both valve rocker arms along with the Spark Plug. Insert the j 22794 Spark Plug port adapter into the Spark Plug opening and fix an air tube onto it. Apply a plastic face hammer against the valve stem end to let the oil varnish dissolve from the valve stem keys. Press the j 38606 valve spring compressor to relax the valve spring tension before taking out the valve stem keys. After spring release, take off the j 38606 spring compressor unit from the component valve spring setup. Take out the Valve Stem Oil Seal as well as its shim. Before adding the new valve seal and shim change your work area carefully to guarantee the valve guide matches perfectly. Smear clean engine oil over both surfaces of the valve stem and valve guide before fixing the Valve Stem Oil Seal in position until it touches the valve guide. Begin by setting the valve spring on the j 38606 tool and use it to compress the valve spring before installing it onto the cylinder head. Insert valve spring cap into its spot and position valve stem keys into each keyway before taking out the j 38606 using grease for stabilization. Let the keys settle in the groove as you reduce the spring pressure from the valve gradually. Hit the valve stem base with a plastic hammer to seat the keys if they do not settle correctly after the removal of j 38606. Disconnect the j 22794 Air Hose and remove it from where it connects with the Spark Plug. Check if the installed valve spring height is greater than 46.25 mm (1.82 inch). Place a 0.5 mm (0.02 inch) thick valve spring shim on the valve spring to reach a precise height range of 46.25 to 46.25 mm (1.82 inch). Take off the Air Hose from j 22794 and put in the Spark Plug before placing the valve rocker arms back in their position.
    Posted by ChevyPartsGiant Specialist
    Q:
    What tool is used to install into the spark plug hole for the 2007 Chevrolet Corvette? Posted by Customer
    A:
    Install the J 22794 (Spark Plug Port Adapter) into the spark plug hole and attach an air hose to it.
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Rocker Shaft Spring Kit
    Q:
    What components are removed after releasing the valve spring tension for the 2008 Chevrolet Corvette? Posted by Customer
    A:
    Remove the J 38606, the valve spring cap, the valve spring, and the valve stem oil seal and shim.
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Rocker Shaft Spring Kit
    Q:
    What should be done after removing the J 38606 for the 2010 Chevrolet Corvette? Posted by Customer
    A:
    Ensure the keys seat properly in the groove of the valve stem.
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Rocker Shaft Spring Kit
    If you have any questions about this product, please don't hesitate to ask us. We will be happy to help you!

OEM GM 12621428, Excellent Performance and Perfect Fitment

To ensure reliability, purchase GM part # 12621428 Valve Springs. It is sometimes referred to as GM Rocker Shaft Spring Kit. Choosing OEM parts is the optimal decision for guaranteeing superior quality and perfect performance. These components undergo stringent quality checks and are carefully constructed to comply with GM's factory specifications, ensuring a smooth installation process.

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