Easy way to pull Subaru pistons

Introduction

This tutorial provides a straightforward method for removing pistons from a Subaru engine block without the need for specialized tools. Whether you're a DIY mechanic or just looking to learn more about engine disassembly, this guide will walk you through the process step-by-step, ensuring you have the necessary information to complete the task efficiently.

Step 1: Prepare the Engine Block

• Ensure the engine is completely disassembled and cleaned.
• Remove any remaining components that may obstruct access to the pistons, such as:
  • Cylinder head
  • Oil pan
  • Timing belt or chain
• Inspect the engine block for any visible damage or debris that could hinder the process.

Step 2: Gather Necessary Tools and Materials

• Collect the following tools:
  • Ratchet and socket set
  • Torque wrench
  • Piston removal tool (if available, otherwise a suitable alternative)
  • Clean cloths or shop towels
  • Engine oil for lubrication
• Having a clear workspace and ensuring all tools are within reach will make the process smoother.

Step 3: Remove the Connecting Rod Caps

• Locate the connecting rod caps on the bottom of each piston.
• Using the ratchet and socket, carefully remove the bolts securing the caps.
• Keep track of the order of the caps and bolts for reassembly.

Step 4: Push the Pistons Out

• Apply a gentle force to push the pistons out from the bottom of the cylinder using a suitable tool or a soft mallet:
  • If you do not have a piston removal tool, a wooden dowel or similar object can be used to avoid damaging the piston.
• Work carefully to avoid scratching the cylinder walls.

Step 5: Inspect the Pistons and Cylinder Walls

• Once the pistons are removed, inspect them for wear and damage.
• Check the cylinder walls for scoring or other signs of wear that may require honing or replacement.
• Clean any debris or oil residues from the piston and cylinder areas.

Step 6: Lubricate and Store Pistons

• Lightly coat the removed pistons with engine oil to prevent rust and damage during storage.
• Store the pistons in a safe place, labeled if necessary, to ensure easy reassembly.

Conclusion

Removing pistons from a Subaru engine can be accomplished without specialized tools if you follow the outlined steps. Always prioritize safety and ensure you have a clean workspace. After removal, inspect all components for wear, and keep your pistons stored properly for future use. If you plan on reassembling the engine, refer to your service manual for torque specifications and reassembly procedures. Happy wrenching!