Steam Engine Conversion Instruction Video #1

Introduction

This tutorial provides a comprehensive guide on converting a four-stroke gasoline engine, specifically the Predator 212, into a steam engine. It covers the initial steps of the process, including the removal and modification of the camshaft. By following this guide, you'll gain the confidence and skills needed to successfully undertake this project.

Step 1: Prepare the Engine

• Remove External Components: Ensure that the fuel and exhaust systems are stripped off the engine. Remove the spark plug as well.
• Save Parts for Modification: If using a Predator engine, save the carburetor stud bolts for later use in modifying the camshaft.

Step 2: Access the Upper Valve Assembly

• Remove Valve Covers:
  • Locate the four bolts on the valve cover of the Predator engine.
  • Unscrew and remove these bolts to expose the upper valve assembly.
• Identify Valve Assemblies:
  • Note the difference in appearance between the exhaust (left side) and intake (right side) valve assemblies, though their functions are the same.

Step 3: Understand Valve Operation

• Rotate the Flywheel:
  • Turn the flywheel clockwise and observe the opening and closing of the valves.
  • Look for the bump during the exhaust valve operation, which is part of the internal low-speed compression release.

Step 4: Learn About Engine Position

• Top Dead Center (TDC):
  • TDC occurs when the piston is at its highest position.
  • This position is achieved twice in a four-stroke cycle: once when the exhaust valve closes and the intake valve begins to open, and again when both valves are fully closed.

Step 5: Disassemble the Valve Assembly

• Remove the Intake Valve Assembly:
  • Detach the Rocker Arm:
    • Use a screwdriver to pry out the c-clips holding the rocker arm shaft in place.
    • Slide the shaft out to free the rocker arm.
  • Remove the Push Rod:
    • Extract the push rod from the engine.
  • Store Parts:
    • Keep the parts organized in a clean area.
• Repeat for Exhaust Valve Assembly:
  • Follow the same procedure as above for the exhaust valve assembly.

Step 6: Remove the Camshaft

• Drain Oil: Begin by draining any oil from the engine.
• Remove Crankcase Cover:
  • Unscrew the bolts on the crankcase cover and slide it off gently. If it sticks, tap it lightly with a block of wood or rubber hammer.
• Align Gear Markings:
  • Rotate the flywheel until the top dead center markings on the camshaft and crankshaft gears are aligned.
• Extract the Camshaft:
  • Once aligned, the camshaft should lift straight out, allowing you to remove the tappets.

Step 7: Reassemble the Engine (without Camshaft and Tappets)

• Use Old Gasket: You can reassemble the engine using the old gasket, ensuring the rubber seal remains intact.
• Snug Bolts: Tighten the bolts lightly for now.

Conclusion

You have now successfully accessed and modified the upper valve assembly and removed the camshaft from your Predator 212 engine. With these foundational steps completed, you are ready to proceed to the next video in the series for further conversion instructions. Ensure you follow each step carefully and store your parts properly for reassembly. Happy building!