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12499225 Set of 16 Hydraulic Roller Valve Lifters For GM Chevy 7.0L 6.2L 6.0L 5.7L 5.3L 4.8L V8 1997-2012 Gen III/IV LS-Series LS1 LS2 LS3 LS7 Engine Camshaft Lifter Kit
: In stock
: 15726071
: PartLimit
$173.99
Regular price
$347.99
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Product Description
What is it?
Hydraulic tappet, also called valve lifter or hydraulic lash adjuster, is a device for maintaining zero valve clearance in an internal combustion engine. It helps get rid of the need for combustion engine to have mechanical clearance in the engine's valve train, to keep the valve from being held open and thus destroyed as the valve train goes through its process of thermal expansion. In effect, valve lifter keeps the valve healthy and protects from an engine's normal thermal expansion process.
Hydraulic lifter helps to ensure less engine noise and longer reliability, due to less wear and tear. A faulty hydraulic lifter will usually result in the rocker arm, valve tip and push rod also going bad if left unattended. If an engine with hydraulic lifters is noisy, then either the internal spring has lost some tension or the check ball is not sealing or allowing the oil to fill the cavity. For all practical purposes, the tappet needs to be replaced.
Customers can find the product you need accurately according to the OE part number. This is a compatible replacement part manufactured our factory. Associated vehicle models and part numbers are used in this listing only to identify the vehicles this Hydraulic Lifter fits.
Replacement Part Number:
- 12499225, 17120735, 17122490, 17089852, 17108057, 17120070
- 17121905, HL124, HL-124, 850-16, 10530-16, 91113
- HT-2148, 12595365, 5234890, 5235498, 5233745, 5234670
For exact years and models, please check compatibility.
GM Passenger Cars
250 CID (4.1L) 1987-1988 265 CID (4.3L) 1994-1996
273 CID (4.5L) 1988-1992 300 CID (4.9L) 1991-1995
305 CID (5.0L) 1987-1993 350 CID (5.7L) 1987-1993
350 CID (5.7L) 1996-1996 350 CID (5.7L) 1992-1997
350 CID (5.7L) 1997-2005 364 CID (6.0L) 2005-2006
GM Trucks 294 CID (4.8L) 1999-2005 305 CID (5.0L) 1996-2002
325 CID (5.3L) 1999-2005 350 CID (5.7L) 1996-2002
364 CID (6.0L) 1999-2006 378 CID (6.2L) 2007-2008
Hummer 364 CID (6.0L) 2003-2006 378 CID (6.2L) 2008
How to Replace Hydraulic Lifters?
1. Prepare Top of Engine: In order to get at the hydraulic lifters, you will need to remove the valve covers. On top of the valve covers are things like air ducts, electrical wires, and other parts that can be removed easily by unbolting and disconnecting them. One way to help ensure that everything is put back together is to take a picture of it before doing any work. Remove all of the necessary items in order to have access to valve covers.
2. Remove Valve Covers : The valve covers are removed with the use of the right sized socket. There are several bolts on each of the covers that hold it in place. Once all of the bolts are removed, pry the cover off of the block with a flat bladed screwdriver, or other type of flat bladed tool.
3. Move Cylinder to Top Center : Once the valve covers have been removed, you will need to bring the number 1 cylinder to the top center position. Move the cylinder and watch to make sure that the valves are closed. Remove the intake manifold bolts and make careful observations of their exact placement to make reassembly easier. Pry the intake and loosen up the manifold.
4. Clean Off Manifold Gaskets : It is important to clean off all of the residue left over from the gaskets on the manifold. Use a gasket scraper, a wire brush, and some solvent in order to clean this left over residue.
5. Remove Hydraulic Lifters : Once the manifold is clean, you can then loosen the bolts for the rocker arm assembly. Move this to the side far enough to be able to access the push rods. Check each rod for any damage. With the use of a strong magnet you can then lift out the hydraulic lifters.
6. Replace Hydraulic Lifters : Place the new hydraulic lifters into the passages and make sure that they can rotate a complete 360 degrees. Place the push rods back into position and tighten the rocker arm assembly. Tighten the rocker arm until there is a 0.10 inch gap between the arm and the valve stem. Repeat this same measurement for each cylinder in the firing order.
7. Apply New Gaskets : Apply the new gasket onto the intake manifold and tighten it into position. Remove the old valve cover gasket with the scraper and solvent. Once the valve covers are clean, apply the new gasket and seal them with gasket sealer.
8. Tighten Bolts : Use a torque wrench and tighten the valve cover bolts to manufacturer specifications. Replace the electrical wiring, and other components, and run the engine to make sure the lifters are working properly.
Car Vacuum Cleaner | |
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Specification | 7000Pa 120W |
Feature | Strong Suction; High Power |
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