What kind of hydraulic lifters does Harley Davidson use?
Since late 2001, HD has used Delphi brand hydraulic lifters. That’s why there was a Harley p/n change from 18538-99 to 18538-99A and now 18538-99B. However, Delphi did not
What’s the name of the Delphi Harley Davidson lifters?
That’s why there was a Harley p/n change from 18538-99 to 18538-99A and now 18538-99B. However, Delphi did not specifically designed for Harley as found in the Johnson-Hylift lifters.
What causes a Harley Davidson lifter to bleed?
After doing some small to stand up to Harley’s heavy valve spring pressure. The oil reservoir inside the lifter is too small. It doesn’t hold enough oil to let the lifter bleed valve train slack. Note: ALL lifters bleed off during operation and even
Why does cylinder head clamp affect piston clearance?
Bore distortion due to cylinder head fastener clamping load also influences final piston clearance figures. Depending on the engine and the construction of the block, it is also possible for other fasteners to distort the bore. These might include motor mounts, pumps, bracketry and so on.
Since late 2001, HD has used Delphi brand hydraulic lifters. That’s why there was a Harley p/n change from 18538-99 to 18538-99A and now 18538-99B. However, Delphi did not
What can happen if I replace hydraulic lifters only?
A hydraulic lifter has an internal piston and check valve the purpose is to remove all free play in the pushrod valve train using the oil pressure from the pump. If the INTERNAL piston and or check valve gets sticky it can get stuck or bleed down and cause lifter clatter
How do you replace a hydraulic lifter on a rocker?
Check each rod for any damage. With the use of a strong magnet you can then lift out the 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.
How do you change the valve cover on a hydraulic lifter?
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. Apply the new gasket onto the intake manifold and tighten it into position. Remove the old valve cover gasket with the scraper and solvent.