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I never knew what I was missing...

Discussion in '7.3L Powerstroke Diesels' started by unclehoser, Jun 28, 2020.

  1. unclehoser

    unclehoser Old dog, new tricks

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    ...until I replaced a few o-rings!

    I've been chasing leaks on the old 7.3 Powerstroke for about 2 years. After a considerable amount of research and advice, I finally chased the engine oil leak to the HPOP fittings. Thanks to the fine folks at dieselorings.com, I now have a leak-free truck! But wait...that's just the beginning...The damned old thing RUNS better than it has since I've owned it (about 3-1/2 years)! The idle is much smoother, the acceleration is quicker, the engine just SOUNDS better. Healthier. Definitely a palpable improvement in driveability!

    All I can surmise is that the oil leak was causing reduced oil pressure to the injectors on at least one cylinder bank, and that increasing the pressure, by eliminating the leak, brought the old beast back up to snuff. That's just a guess...I'm not a diesel mechanic or an engineer! Suffice it to say, though, that I'm one happy camper (yes, I do drag a 30-foot travel trailer around with it).

    One of the o-rings (can't remember which) looked more like a hardened piece of plastic or cardboard upon removal. Of course, I'll assume that it was the one causing the majority of the problem. No matter, it's a done deal now. Pain in the butt, but DONE!!!

    Cheers...
    Dave
     
    aggiediesel01 likes this.
  2. Grey Wolf

    Grey Wolf Registered User

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    These are usually the most rewarding repairs:Thumbs Up
     
  3. 56 Ford man

    56 Ford man Registered User

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    I don't have those on my 1989 7.3 IDI but I do have some oil leaks. Valve covers got half of it and I'm pretty sure the rear main will get the rest.
     
  4. unclehoser

    unclehoser Old dog, new tricks

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    I'm just damn happy I found that one. Now I get to attempt cleaning all the oil stains out of the driveway. Wish me luck...

    Dave

    Edited...as an aside here...does anyone have a good method for removing deeply embedded oil/diesel fuel stains from concrete? I dumped an entire gallon of ammonia on this crap today, broomed it in, let it soak, and power washed it "up close and personal" with a 25-degree nozzle...very little improvement, to say the least (what I'd like to say is unprintable). I'm thinking maybe muriatic acid is the next attempt.
     
    Last edited: Jul 4, 2020
  5. unclehoser

    unclehoser Old dog, new tricks

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    Amen to that, sir! I was expecting a reduction in the oily mess, but got a bonus in performance! Some days your the windshield...
     

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