Assembling a Shovelhead Top End

Published on January 18, 2024
Duration: 15:48

This comprehensive guide from Dragonman details the intricate process of assembling a Shovelhead engine top end. It covers critical steps from piston and ring installation, including the proper technique for spiral lock rings, to cylinder and head mounting with specific torque recommendations. The video also provides expert advice on adjusting hydraulic lifters and pushrods, emphasizing common pitfalls and offering proven methods for a reliable engine build. The instructor, Dragonman, shares decades of experience, offering practical tips for both Panhead and Shovelhead engines.

Quick Summary

Dragonman provides an expert guide to assembling a Shovelhead engine top end. Key steps include proper piston and ring installation, using spiral lock rings, and correctly mounting cylinders and heads with a 65-pound torque spec. He also details crucial techniques for adjusting hydraulic lifters and pushrods, emphasizing common mistakes to avoid for a reliable engine build.

Chapters

  1. 00:00Introduction & Rebuild Overview
  2. 00:58Component Preparation & Piston Installation
  3. 02:10Spiral Lock Ring Installation Technique
  4. 03:40Piston Ring Installation
  5. 04:26Cylinder Installation Process
  6. 06:05Head Installation & Gasket Sealing
  7. 07:49Cylinder Head Torquing Specifications
  8. 08:50Hydraulic Lifter Preparation & Adjustment
  9. 10:45Pushrod Identification & Installation
  10. 11:25Evolution Motor Lifter & Pushrod Adjustment
  11. 13:42Base Gasket Installation & Lubrication
  12. 14:06Priming the Oil Pump
  13. 15:15Final Tips & Contact Information

Frequently Asked Questions

What is the correct torque specification for Shovelhead cylinder heads?

The recommended torque specification for Shovelhead cylinder heads is 65 pounds. It's crucial to torque them in an opposite pattern to ensure even pressure and prevent damage. Re-torquing after the initial run-in is also essential.

How do you properly install piston rings on a Shovelhead engine?

When installing piston rings, ensure any chamfer or marks face upwards. Use your fingers to gently spread the rings and slide them onto the piston grooves. Avoid over-spreading, which can break the rings.

What is the best way to adjust hydraulic lifters for a Shovelhead engine?

To adjust hydraulic lifters, fill them with oil first to remove air. Adjust them so they spin with a slight drag. Avoid the common mistake of over-tightening, which can cause valve-to-valve contact and damage.

How can you prime the oil pump on a Shovelhead engine before starting?

To prime the oil pump, have someone turn the motor over while you continuously squirt oil into the pump inlet with an oil can. This ensures oil pressure builds quickly upon startup, preventing internal engine damage.

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