Can a mechanical lifter cam be used on a hydraulic lifter?
With today’s modern cam grinding equipment and cam lobe designs it is possible to create a mechanical (solid) lifter cam that is mechanically quieter than a high performance hydraulic lifter cam.
Are there any high performance hydraulic lifters that are noisy?
They are noisy, or my rockers are noisy! Stock hydraulic lifter cams are designed to be very quiet and smooth running. High performance hydraulic cams are designed for neither, they are designed for power – period.
Are there break in procedures for hydraulic lifters?
While many think break-in procedures are just for flat-tappet cams, testing has shown that today’s close-tolerance hydraulic lifters greatly benefit from a dedicated break-in procedure. A recent two-year study of valve train break-in procedures has discovered a new direction in proper cam and lifter break-in.
How does a hydraulic lifter preload seat work?
When the rocker arm assembly is properly torqued down into position, the pushrod must take up all the clearance and descend into the hydraulic lifter, causing the pushrod seat to move down by .020? to .060? for most applications. The distance that the pushrod seat moves down away from the retaining lock is the “lifter preload”.
With today’s modern cam grinding equipment and cam lobe designs it is possible to create a mechanical (solid) lifter cam that is mechanically quieter than a high performance hydraulic lifter cam.
They are noisy, or my rockers are noisy! Stock hydraulic lifter cams are designed to be very quiet and smooth running. High performance hydraulic cams are designed for neither, they are designed for power – period.
When the rocker arm assembly is properly torqued down into position, the pushrod must take up all the clearance and descend into the hydraulic lifter, causing the pushrod seat to move down by .020? to .060? for most applications. The distance that the pushrod seat moves down away from the retaining lock is the “lifter preload”.
How to get to the bottom of a hydraulic lifter?
Wait a few minutes, allowing the lifters to bleed down. Now, lay a rigid straightedge across the cylinder head, supporting it on the surface of the head where the valve cover gasket would go.