Quick Harley Motorcycle Tips

Published on October 24, 2025
Duration: 6:10

This video provides expert guidance on common Harley-Davidson engine rebuild issues, focusing on push rod adjustment for both solid and hydraulic lifters, and setting ignition timing. Dragonman emphasizes proper bleeding of hydraulic lifters and a precise method for timing without relying solely on factory marks, using piston position relative to Top Dead Center. The session concludes with advice on tightening head bolts after the engine warms up.

Quick Summary

Expert Harley-Davidson engine rebuild advice from Dragonman covers common issues like push rod adjustment for solid and hydraulic lifters. He details how to properly bleed hydraulic lifters and set ignition timing using piston position (0.437" before TDC) rather than relying solely on potentially confusing factory marks, especially for late 1978 models.

Frequently Asked Questions

How do you adjust solid lifter push rods on a Harley-Davidson engine?

To adjust solid lifter push rods, locate the cam lobe at its lowest point. Loosen the two 7/16 nuts on the push rod assembly and spin the push rod itself until you feel a slight drag. Then, rotate the engine to the next push rod and repeat the process.

What is the common problem with hydraulic lifters in Harley-Davidson engines?

A major issue with hydraulic lifters is over-adjustment, often by following the manual's four-turn rule when the lifter is already full of oil. This can cause the push rod to hold the valve open, leading to potential contact with the piston.

How can you bleed a hydraulic lifter that is 'hard as a rock'?

If a hydraulic lifter is 'hard as a rock' (full of oil), you need to bleed it. Push down on the check ball until oil escapes, submerge the lifter in fresh oil, and then release it. Repeat this process two to three times until the lifter feels properly filled and bled.

What is the correct method for setting Harley-Davidson ignition timing without using the marks?

To set timing without marks, remove the front spark plug and insert a rod into the hole. Slowly turn the engine until the piston reaches 0.437 inches (7/16ths) before Top Dead Center. At this precise point, the ignition points should just begin to open.

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