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

  1. #21
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    Re: Tons of blowby rings possibly stuck. Ideas....

    i guess the next thing is pull apart inspect and measure. What's a good place for the measurements of the bore or piston diameters to see what I have when I pull them. Then I need to decide what to do as far as if I just hone it and throw slugs in. Guess I should buy a set of bore gauges and do some actual measurements.
    Last edited by Vigo; 10-04-2014 at 01:56 PM.

  2. #22
    boostaholic
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    Re: Tons of blowby rings possibly stuck. Ideas....

    I would say pull the pistons first before you start buying expensive measuring equipment. If you need a rebuild the engine shop will be doing all that measuring for you at any rate. I would bet you have a busted ring land or two hiding in that block.

  3. #23
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    Re: Tons of blowby rings possibly stuck. Ideas....

    I was suggesting the MMO would help free stuck rings, but yes, no liquid would fix broken pistons.

  4. #24
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Quote Originally Posted by going4speed View Post
    I would say pull the pistons first before you start buying expensive measuring equipment. If you need a rebuild the engine shop will be doing all that measuring for you at any rate. I would bet you have a busted ring land or two hiding in that block.
    If the bores look decent even tho piston or rings may be messed up I will measure them and then determine if it needs bored or not. If not hone it and slap some slugs in and be good to go.

  5. #25
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Quote Originally Posted by turismolover22 View Post
    no liquid would fix broken pistons.
    JB Weld doesn't qualify as liquid?

    (If you bust a piston in the wilderness in your n/a Jeep, it might get you back to civilisation, but obviously taint durable)
    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!

  6. #26
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    Re: Tons of blowby rings possibly stuck. Ideas....

    if you pull the pistons and see decent crosshatch in the bore, and no scoring on the cylinder walls or the pistons don't bother measuring anything- its fine, run over the cylinders with the correct size and grit ball hone and toss a new set of rings in there put it back together and call it a day.

  7. #27
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Quote Originally Posted by crusty shadow View Post
    if you pull the pistons and see decent crosshatch in the bore, and no scoring on the cylinder walls or the pistons don't bother measuring anything- its fine, run over the cylinders with the correct size and grit ball hone and toss a new set of rings in there put it back together and call it a day.
    I bought some measuring tools. Gonna tear it down next weekend. It looked great prior to startup but the bottom end was out of a Daytona with a blown hg. Pistons looked good from the top an bores to. Plastigauged bearings but didnt pull pistons because everything looked fine

  8. #28
    turbo addict Pat's Avatar
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Quote Originally Posted by bgbmxer View Post
    I bought some measuring tools. Gonna tear it down next weekend. It looked great prior to startup but the bottom end was out of a Daytona with a blown hg. Pistons looked good from the top an bores to. Plastigauged bearings but didnt pull pistons because everything looked fine

    I was going to climb up in the rafters to dig that stuff out for you today, but it looks like you should be in good shape. Pop the rods/pistons out, very all is well and if so, new rings should do it. Just make sure you give it a quick hone and set the ring gaps.

  9. #29
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    Re: Tons of blowby rings possibly stuck. Ideas....

    What for grit hone and what ring gap?

  10. #30
    turbo addict Pat's Avatar
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Ring depend on the intended use if the motor. How much power, nitrous, big boost, street, drag, etc.

    The last motor I helped do we set the ring gap loose, but it was a race motor. We did .024 on the top ring and .026 on the second ring. I thought it would blow by some, but it actually seals pretty well.

    Grit for hone: I have an old stone hone I have always used. Not sure of the grit.

  11. #31
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Quote Originally Posted by Pat View Post
    Ring depend on the intended use if the motor. How much power, nitrous, big boost, street, drag, etc.

    The last motor I helped do we set the ring gap loose, but it was a race motor. We did .024 on the top ring and .026 on the second ring. I thought it would blow by some, but it actually seals pretty well.

    Grit for hone: I have an old stone hone I have always used. Not sure of the grit.

    Not a full race car but will be beat and just under the 300 horse range.

  12. #32
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    Re: Tons of blowby rings possibly stuck. Ideas....

    The street/strip set up in my 90 shadow is .019 top, .021 second. Car runs 11.9's on pump gas.

  13. #33
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    Re: Tons of blowby rings possibly stuck. Ideas....

    I'm trying to find the specs for the stock sized piston and bore so I can buy a hone and such. Still searching...

  14. #34
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Found it 3.445 inches

  15. #35
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Now to decide on what grit hone to get

  16. #36
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    Re: Tons of blowby rings possibly stuck. Ideas....

    IF you find cracked pistons, then go anal on checking out all the bearings, something might have got mashed egg shaped before the pistons gave way, 'coz if bottom end has seen HG failure we could suspect hydrolock damage.
    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!

  17. #37
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    Re: Tons of blowby rings possibly stuck. Ideas....

    You choose grit AFTER you choose rings. Ring material determines finish requirements.

    Rough grit will chew up some rings, smooth grit will not allow some rings to seat.
    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

  18. #38
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    Re: Tons of blowby rings possibly stuck. Ideas....

    True, check ring manufacturer recommendations to be sure. IIRC Chrome finish rings need harsh grit, Moly faced rings a smaller grit, while plain cast (bargain basement, sub OEM spec) need something in between.
    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!

  19. #39
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Quote Originally Posted by RoadWarrior222 View Post
    IF you find cracked pistons, then go anal on checking out all the bearings, something might have got mashed egg shaped before the pistons gave way, 'coz if bottom end has seen HG failure we could suspect hydrolock damage.
    I cleaned the tops of the pistons and saw no cracks. If they are cracked then its between ring lands then ill see when they get pulled. Bearings looked fine.

  20. #40
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    Re: Tons of blowby rings possibly stuck. Ideas....

    Planned on using Hastings piston rings.

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