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Old 28-04-2023, 19:21   #1
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Join Date: Jul 2019
Posts: 145
Yanmar Fuel Injection Pump Stuck !

Hi everyone, I’ve decided to start a new thread for this part of my project as I have found a few threads speaking about this but I could find a reply to the following:

1) can you remove the plunger from the top, without removing the springs?

2) how much can I take apart without having to redo the timing, etc?

Basically, I have 3 stuck plungers I believe on a 4jh2-te that was sitting for years and has just been rebuilt.
I removed the valve and have managed to release the inner shaft from the plunger but although the springs now move and aren’t stuck anymore, the inner shaft doesn’t return to top.

I’m attaching a photo from earlier on today.

Any ideas would be greatly appreciated 🙂

https://ibb.co/xYZD3ZH
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