Subaru EJ25 - 油门柱压缩工具

Subaru EJ25 - Valve Spring Compression Tool

2024-03-21 08:38:19

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Summary

WARNING - This tool REQUIRES a bench top or standing drill press to work !!

This was designed and tested removing/reinstalling the valves on a Subaru EJ25 SOHC engine. It may work for other EJ25 variants but I have NOT tested anything other than the engine I have.

This project contains two models

Valve Compressor - The tool has a 1/2" shank and inserts into a standard drill press chuck. This allows you to compress the valve springs using the feed handle of your drill press.
Combustion Chamber Block - This block fills the combustion chamber to allow the valve to push against something relatively soft so that the valve spring can be compressed rather than simply having the valve move during the compression event.

NOTE - This setup requires you to provide a mechanism to tilt the head on the drill presses' work table so that the top of the valve is parallel to the printed compression tool. I accomplished this by placing the head on a non-slip mat on top of a piece of plywood and then propping the plywood up with a scrap 2x4. I used one hand to operate the feed handle of the drill press while holding a magnet in my other hand to extract the valve keepers. If the head is stable and can't slip or shift, it works pretty well.