Neglected 7.3L project. - 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 11-07-2018, 07:00 AM Thread Starter
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Neglected 7.3L project.

So I purchased a neglected 7.3 that needs injectors. However, I will do a compression test when I get things open and I am a little concerned that I may get poor results. I plan on having everything ready to proceed with the injectors should compression be ok.


1) Assuming all cylinders are in the same range, what is the lowest psi I should accept and go ahead with injectors?


2) If compression is bad, I plan on sending the injectors back and pursuing a rebuilt long block.


3) If #2 is the path, what is the best source for a rebuilt long block?


Thanks.


2000 7.3 F350 4x4 160,000 miles
Truck is a farm truck that will probably see less than 10k miles a year. Will pull an occasional heavy trailer.

'01 F350 DRW Stock
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post #2 of 3 (permalink) Old 11-07-2018, 11:59 PM
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Unless your truck has been really neglected, such as dust getting by the filter into the engine for a long time, I'd expect with your mileage, your compression test will be fine probably in the 350 psi range. If you find one or more cylinders below 75% of the highest (say 300 psi versus a high of 400 psi), that would indicate a problem with the base engine. If an engine has been dusted, the center two cylinders on each bank would test lower than the end cylinders. There's really no spec for lowest compression on all cylinders overall, but if there are starting problems that aren't caused by glow plug or other issues like low cranking RPM, that indicates a worn engine.

Again, my guess is that you won't have any base engine issues at 160k miles. It's barely broken in.

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post #3 of 3 (permalink) Old 11-08-2018, 04:25 PM Thread Starter
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Thanks. I'll keep my fingers crossed on the compression test.

'01 F350 DRW Stock
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  Diesel Forum - TheDieselStop.com > 1999-2007 Ford Super Duties > '99 & up 7.3L Power Stroke Engine and Drivetrain

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