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6.9 Blowby...Rebuild or new rings?

Discussion in '6.9L IH & 7.3L IDI Diesels' started by Rusgo, Oct 15, 2019.

  1. IDIBRONCO

    IDIBRONCO IDIBRONCO

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    That all sounds good. Still, it's a good idea to check the valve to piston clearances. Just in case. It takes some time, but isn't all that hard to do. Then let us know the results and how it runs when you're done.:Thumbs Up
     
  2. Rusgo

    Rusgo Full Access Member

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    Yeah for sure. You all put fear of the idi gods in me.

    Sent from my SM-G975U using Tapatalk
     
  3. saburai

    saburai Supporting Member Supporting Member

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    Glad that it's shaping up for you. It's unfortunate that you have to "pull teeth", do your own QC and go back a second time to get what you payed for the first time around. I'm glad that when pressed, they just took it back and made it right without feeding you a song and dance.
    It just keeps getting worse out there - parts are shit, people's misrepresentation of their knowledge and ability, rushing to finish and making mistakes along the way, sometimes even blaming the customer...
     
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  4. Rusgo

    Rusgo Full Access Member

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    Yeah seriously. I always go in expecting a fight when this stuff should be straight forward. I just told them the heads looked beautiful, but there were a couple spec issues I wanted to see if they could refine because of super tight piston to valve clearance. Try not to go in pissed anymore. Never seemed to work.

    Does seem like most things take two try to get right these days.

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    Last edited: Oct 31, 2019
  5. saburai

    saburai Supporting Member Supporting Member

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    Two if you're lucky. Gotta be diplomatic, busting balls don't get you nice parts...
     
  6. IDIBRONCO

    IDIBRONCO IDIBRONCO

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    Yes, but it's still always a good idea to check your valve to piston clearances before installing a bigger cam. Even if everything is in spec.
     
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  7. saburai

    saburai Supporting Member Supporting Member

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    Of course! Twice, at least...
     
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  8. Rusgo

    Rusgo Full Access Member

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    After all the straight spec talk on the heads, decided to order the comp cams 910-16 springs.

    Using the lisle 36050 tool, removal takes one big smack from a big hammer. Cant use it to install because the small plastic umbrella seals fall out with the impact.

    Old spring were easy to compress some with one hand. New springs barely budged. [​IMG][​IMG]

    Sent from my SM-G975U using Tapatalk
     
    Last edited: Nov 8, 2019
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  9. Rusgo

    Rusgo Full Access Member

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    After taking the exhaust valve springs off, found there were no exhaust valve stem seals. Fearing the worst, checked the 6.9 shop manual and and the illustrations show... no exhaust valve stem seal! Wtf?!

    Looked in my gasket kit and found these clear little turds.

    The small ones appear to press into the bottom of the keepers on all 16 valves? Except most people only install them on the exhaust side.

    There was a point where Ford updated the valve train to include tradition seals o. The exhaust valves to reduce emissions, but too many people were burning up valve guides and they went the the clear umbrella seals.
    [​IMG][​IMG][​IMG]

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    Last edited: Nov 8, 2019
  10. IDIBRONCO

    IDIBRONCO IDIBRONCO

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    In my opinion, any attempt at emissions on these was a joke and tended to shorten the life of parts in the head. I'm not convinced that any of these things actually did much.
     
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