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Thread: Tons of blowby rings possibly stuck. Ideas....

  1. #41
    Moderator Turbo Mopar Staff Vigo's Avatar
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    Re: Tons of blowby rings possibly stuck. Ideas....

    If they are cracked then its between ring lands
    That's where they almost ALWAYS break

    If you see detonation damage on the top of the piston then it's GUARANTEED to have broken ringlands too. If you dont see damage on the top then it is just LIKELY to have broken ringlands.

    Dont push the red button.You hear me?

  2. #42
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    Re: Tons of blowby rings possibly stuck. Ideas....

    If it's your lucky day though, they're just really welded in with carbon... sometimes that stuff is tenacious, had some on exhaust valves and the difference between soaking it in solvent and not was granite vs hard coal, i.e. became possible to scrape (rather than grind) off... nothing was gonna just rinse it off there.
    DD1: '02 T&C Ltd, 3.8 AWD. DD2: '15 Versa Note SV, replacing.. DDx: '14 Versa Note SV << freshly killded :( ....... Projects: '88 Voyager 3.0, Auto with shift kit, timing advance, walker sound FX muffler on 15" pumpers wrapped in 215/65/R15 H rated Nexens.... and a '95 phord escort wagon PnP head << Both may need to go :( ..... I like 3.0s ... so??? ... stop looking at me like I've got two heads!

  3. #43
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    Re: Tons of blowby rings possibly stuck. Ideas....

    The only luck I have is bad luck. So I'm screwed

  4. #44
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Got the garage cleaned up the car pulled in and the head pulled off the car. Don't see any scoring in the bores or anything like no cracks I can see from the tops. Pulling the pistons tomorrow and see what I find and do some measuring

  5. #45
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    Re: Tons of blowby rings possibly stuck. Ideas....

    [URL=http://s268.photobucket.com/user/bgbmxer/media/imagejpg1-17.jpg.html][/URL

    Both 3 and 4 cracked around ring lands

  6. #46
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Quote Originally Posted by Vigo View Post
    That's where they almost ALWAYS break

    If you see detonation damage on the top of the piston then it's GUARANTEED to have broken ringlands too. If you dont see damage on the top then it is just LIKELY to have broken ringlands.
    see picture above

  7. #47
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Finally got a chance to measure. Here is what I got. Think I'm good with a hone and some new slugs?[URL=http://s268.photobucket.com/user/bgbmxer/media/imagejpg1-18.jpg.html][/URL

  8. #48
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Seems barely worn at all to me, but I'm going by the old rule of thumb of 0.010 inch
    DD1: '02 T&C Ltd, 3.8 AWD. DD2: '15 Versa Note SV, replacing.. DDx: '14 Versa Note SV << freshly killded :( ....... Projects: '88 Voyager 3.0, Auto with shift kit, timing advance, walker sound FX muffler on 15" pumpers wrapped in 215/65/R15 H rated Nexens.... and a '95 phord escort wagon PnP head << Both may need to go :( ..... I like 3.0s ... so??? ... stop looking at me like I've got two heads!

  9. #49
    turbo addict Turbo Mopar Contributor
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Cylinder 2 seems like the worst out of round wise.
    Brent GREAT DEPRESSION RACING 1992 Duster 3.0T The Junkyard - MS II, OEM 10:1 -[I] Old - 11.5@125 22psi $90 [U]Stock[/U] 3.0 Junk Motor - 1 bar MAP [/I] 1994 Spirit 3.0T - 11.5@120 20 psi - Daily :eyebrows: Holset He351 -FT600 - 393whp 457ft/lb @18psi 1994 Spirit 3.0T a670 - He341, stock fuel, BEGI. Wife's into kid's project. 1990 Lebaron Coupe 2.2 TI/II non IC, a413 1990 Spirit 3.0 E.S. 41TE -- 1993 Spirit 3.0 E.S. 41TE -- 1994 Duster 3.0 A543 1981 Starlet KP61 Potential driver -- 1981 Starlet KP61 Parts -- 1983 Starlet KP61 Drag 2005 Durango Hemi Limited -- 1998 Dodge 12v 47re. AFC mods, No plate, Mack plug, Boost elbow -- 2011 Dodge 6.7 G56

  10. #50
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Cylinder 2 had the same compression as #1. 3 and 4 were the cracked ones. Thinking I should run it. But want to find what the spec is for the bores.

  11. #51
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    Re: Tons of blowby rings possibly stuck. Ideas....

    What I've got in the '90 FSM for service limit is 0.002" out of round and 0.005" for taper, doesn't give a fine tolerance for overall just says 3.44/3.45

    But anyway, sounds a bit borderline on the roundness, depends how long you want not to have to mess with it for, if you want it good "forever" bore it, if 50,000 miles is good enough, don't.
    DD1: '02 T&C Ltd, 3.8 AWD. DD2: '15 Versa Note SV, replacing.. DDx: '14 Versa Note SV << freshly killded :( ....... Projects: '88 Voyager 3.0, Auto with shift kit, timing advance, walker sound FX muffler on 15" pumpers wrapped in 215/65/R15 H rated Nexens.... and a '95 phord escort wagon PnP head << Both may need to go :( ..... I like 3.0s ... so??? ... stop looking at me like I've got two heads!

  12. #52
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Quote Originally Posted by RoadWarrior222 View Post
    What I've got in the '90 FSM for service limit is 0.002" out of round and 0.005" for taper, doesn't give a fine tolerance for overall just says 3.44/3.45

    But anyway, sounds a bit borderline on the roundness, depends how long you want not to have to mess with it for, if you want it good "forever" bore it, if 50,000 miles is good enough, don't.
    this is what I was thinking. That I can hone it and will be fine for a good while. Especially since I'd beat the crap out of it anyways. Cars that are beat on tend not to last forever.

    it was very hard to measure the bores. I would measure it 3 different times and get 3 different measurements. Could have averaged them I guess. Good micrometer and bad bore gauges lol.

  13. #53
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    Re: Tons of blowby rings possibly stuck. Ideas....

    What's the details on the build? If it's a 2.5 auto, stock-ish to not humungous sized turbo, 2 bar or less, then it's not gonna rev over 5,500ish and it should be okay....er..... but if it's for a manual 2.2 or 16V swap, or big turbo, that's going to be "up there" RPM wise, then you'll feel it get a strange oscillation/wobble at high RPM and that'll be the pistons working side to side and ovalling it out RAPIDLY.
    DD1: '02 T&C Ltd, 3.8 AWD. DD2: '15 Versa Note SV, replacing.. DDx: '14 Versa Note SV << freshly killded :( ....... Projects: '88 Voyager 3.0, Auto with shift kit, timing advance, walker sound FX muffler on 15" pumpers wrapped in 215/65/R15 H rated Nexens.... and a '95 phord escort wagon PnP head << Both may need to go :( ..... I like 3.0s ... so??? ... stop looking at me like I've got two heads!

  14. #54
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    Re: Tons of blowby rings possibly stuck. Ideas....

    It's a 2.2 cb in an 88 shadow. The head is a ported swirl with +1 valves super 60 roller. Ported exhaust mani and ported 2piece. Super 60 turbo. 2 bar for now.

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