'01 7.3L turbo issue - Diesel Forum - TheDieselStop.com
'99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the '99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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post #1 of 3 (permalink) Old 04-27-2017, 07:01 PM Thread Starter
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'01 7.3L turbo issue

So I'm new to the forum. I've been using forums for years to troubleshoot problems and figured I'd try it since I can't find the issue anywhere. So I had my engine rebuild and the shop finally got 90% of the issues resolved they are stuck again on the turbo. The turbo compressor output seal keeps blowing for some reason that they can't find. They say they have rebuilt it, fixed all the exhaust leaks, and adjusted the wastegate. The truck runs fine but as little to no boost and the said they test the turbo and it tested out fine. Any help would be appreciated.
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post #2 of 3 (permalink) Old 04-27-2017, 10:08 PM
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Forget the exhaust / intake / boost - all that stuff. The seal is going to blow due to oil pressure. My guess is your oil return is plugged. Have you put a gauge on your engine to see what kind of oil pressure you are producing? There is a remote possibility your bypass is blocked creating an overpressure situation to the whole block and overwhelming the turbo oil return, but I'd bet on the former over the latter. Still, putting a gauge on it is the cheapest first test. You should be looking at 75 psi cold oil pressure at 2000 RPM, 50 psi at idle. That will drop to 50 psi hot oil pressure at 2000 RPM and 25 psi at idle. If you are seeing anything higher than that, you'll need to drop the rear oil cooler header and find out what's wrong with the bypass.

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post #3 of 3 (permalink) Old 04-28-2017, 07:29 AM Thread Starter
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That makes sense. I'm nowhere near an expert on turbos but I'll let the technician know. I haven't had my truck in 9 months because issues with the rebuild and the shop. They are probably tired of me telling them how to fix the issues that they can't figure out. Thanks for the assist
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