Chevy 7.4L 8.1L HT2279B Valve Hydraulic Roller Lifter Set Of 4

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Description
Brand: Sealed Power
Part Number: HT2279B
Condition: New
Sold As: Set Of 4

Chevy 7.4L 8.1L HT2279B Valve Hydraulic Roller lifter are 100% Rockwell tested. This is Sealed Power's HT2279 but bought in Bulk and placed into sets for you

Interchange

TO BE USED AS A GUIDE ONLY - Application Must Be Verified

DANA/PERFECT CIRCLE	2131777
ENGINETECH	L7400
FEDERAL MOGUL/SEALED POWER	HT2279
GM	17120060
GM	17120061
GM	25362189

Sealed Power Hydraulic Valve Lifters

The basic function of a hydraulic lifter is to ride up and down on the cam lobe and open the valves when the cam rotates. Sounds simple doesn't it? Wrong !

The hydraulic lifter is one of the most complex components of an internal engine, with a multitude of moving parts with the main purpose of maintaining zero lash. When the camshaft is at the beginning of lift, all the lifter internal components are in the zero-lash position. The check ball is seated and has sealed the high pressure chamber. Starting valve lift cycle (where the camshaft pushes the lifter up), the valve spring applies force on the lifter, which slightly depresses the internal components. Then, a controlled leak-down occurs: An internal spring pushes the internal components firmly against the push rod to remove any lash in the system, after which the process starts all over again.

A hi strength, break in additive is now required for installation of new flat tappet lifters. Recent changes in engine oils have eliminated zinc and phosphorus from typical oils and this is absolutely necessary for new cam/lifter installations. We recommend a Competition Cams # 159 for this application.

This Part Fits The Following Vehicles



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