Join Date: Oct 2010
Feedback Score: 0 reviews
If your going to fix the STC fitting issue, be ready to do a lot of other things while your in there. I say this because the cost of the work is mostly labor. If your doing it yourself, you might say it's you own time, so it doesn't matter. But after doing it, I definitely am glad I did everything at once. I wouldn't say it was real difficult, but it was a time consuming job; one which I don't want to do again for a long, long time.
I did the following:
Rebuilt oil cooler
Replaced EGR cooler with the the one from Bulletproof Diesel
Replaced my water pump
Replaced my serpentine belt
Replaced my dummy plugs and stand pipes
I'm hoping I don't have to open up the engine again for at least 100,000 miles.
I may need some injectors, but this will be a significantly smaller job than what I just did.
You asked what the STC fitting was.....as dieselmac said, it connects the HPOP to the branch tubes, which feed the high pressure oil to your heads, which in turn supplies the injectors. A good way to describe this fitting is to compare it to the fitting on a compressor air hose, only this hose sends 4,000 psi oil to your injectors. It was really silly for International Harvestor to even use this fitting. It's flaky. The repair is to replace the connector, that has this fitting, with a different style connector that doesn't even have the STC connector. The new one is a straight metal pipe.