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I'm replacing the injection pump on my m1009 and after cleaning off all the grease I noticed the timing mark was significantly advanced, about 0.100"
Why would the previous owner have advanced the pump like this? To compensate for a worn timing chain? The truck ran fine but the IP was leaking badly, so I decided to replace it while I was in there for the turbo installation.
Now I'm trying to decide if I should copy the existing timing which worked (.100" advanced), or if I should align the factory mark on the pump...
In the photo you can see the stock timing mark on the engine as well as an additional smaller mark which has been scribed to the side. The mark on the IP is between these two and advanced about 0.100 past the factory mark
![PXL_20240508_181535653.jpg PXL_20240508_181535653.jpg](https://www.steelsoldiers.com/data/attachments/678/678202-c869ed31addba30d48e9bd9bc0005909.jpg)
Why would the previous owner have advanced the pump like this? To compensate for a worn timing chain? The truck ran fine but the IP was leaking badly, so I decided to replace it while I was in there for the turbo installation.
Now I'm trying to decide if I should copy the existing timing which worked (.100" advanced), or if I should align the factory mark on the pump...
In the photo you can see the stock timing mark on the engine as well as an additional smaller mark which has been scribed to the side. The mark on the IP is between these two and advanced about 0.100 past the factory mark
![PXL_20240508_181535653.jpg PXL_20240508_181535653.jpg](https://www.steelsoldiers.com/data/attachments/678/678202-c869ed31addba30d48e9bd9bc0005909.jpg)
Last edited: