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Ecotec auto to manual

Discussion in 'V6 Development And Modification' started by vt1538, Oct 20, 2005.

  1. F/INJ Suicide Machine

    F/INJ Suicide Machine New Member

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    I put an Auto VT V6 into my Manual VS S2 and I put the flywheel on with no dowell pins, it was just a pain in the butt to line up the holes because it only goes on one way. Dowell pins arent for strength its just to line it up. I have a Getrag with a heavy ass Dual mass flywheel and all i did was replace the TTY bolts and it runs like a dream. I didnt balance anything and I have no vibrations. Ive 'shock loaded' it pleanty of times and it hasent come into the cabin yet so im convinced that dowell pins and a balance arent needed. Oh and yes, new loom and manual PCM is needed.
     
  2. OZ38

    OZ38 Member

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    I disagree with you on the dowel pins purpose. They are there to stop small movements back & fourth of the flywheel on the bolt to bolt hole clearance. The small movement if allowed to start will help work the bolts loose. Some people get away with doing it as you have & others don't. Most times the problems seem to occur when turning a L67 engine from auto to manual, as the L67 is a different balance to the Ecotec engine.

    Cheers

    Deek
     
  3. holdonvntt

    holdonvntt New Member

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    fark it i waited two weeks to long for another manual/engine when having a auto/engine sitting there going to run the flywheel with no dowels see how we go. also i found a site last night might help out

    Holden V6 Parts < < < ~~~~~~

    automatic transmissions usually come with a flex plate which is fitted with the starter ring gear and engine balance weight. Marks 4WD Adaptors now manufacture a flywheel that bolts up behind the automatic flex plate thereby retaining the ring gear and the original engine balance.
     
  4. GmComx

    GmComx New Member

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    I am currently buying a conversion kit to change the VX commodore to manual Getrag 5speed the part come from a VY and the engine loom is diffrent and would any one know if the VY PCM is diffrent the service number is the same as mine not sure if it will work properly? Also will it be best to use original Dual Mass flywheel or Solid some people say there is more gear noise with solid flywheels?
     
  5. Dobby0500

    Dobby0500 New Member

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    Hi I know that this is an old post but I was just wondering if this guide for drilling the l67 cranks is the same when drilling a ecotec to mount a manual flywheel to an auto motor
     
  6. _R_J_K_

    _R_J_K_ Well-Known Member

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    Shouldn't need to redrill an auto Ecotec crank. Might be missing the crank dowels but the flywheel will bolt up.
     
  7. Dobby0500

    Dobby0500 New Member

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    Cool an this for the reply
     
  8. immortality

    immortality Moderator Staff Member

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    Yes, ecotec and L67 use the same crank, it's the balance that is different due to the heavier rod/piston combo used in the L67.

    TBH, I don't know if I would bother with the dowel pins, they don't add any strength to the joint. dowels are used to ensure the alignment is 100% spot on. Just make sure the flywheel been used is mirror balanced to the ring gear that comes off.
     
  9. gib2424

    gib2424 New Member

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    howdy , about 6 yrs ago I purchased a VN series 1 V6 auto sedan , during the years since I have came to the conclusion after repairs and upgrades and comparing the series 1 to the series 2 that the series 1 V6 is far better than the series 2 ecotec , the cylinder heads on series 1 are a much better design and when the compression on series 1 is taken up to a sensible number above the stupid 8.5 there is no comparison , my VN now has an auto trans rebuilt with all corvette bits and a decent converter and the rear has 3.7's and I am so glad it is not the ecotec V6 , I have no trouble accelerating very fast indeed and my fuel economy is much better than it used to be AND the engine doesn't scream itself to death accelerating , there are other mods on my VN that help a lot but in general the series 1 V6 is the better engine than any ecotec with a silly manual trans . gib
     
  10. Ynotman

    Ynotman New Member

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    Dude I just put a vt auto ecotec motor in my manual vx and it’s easy as. I do suggest drilling the two dowel pins as they prevent the clutch assembly from sheering the bolts off. The bolts are just there to hold the flywheel to the crank. Just follow the instructions OZ38 in this thread has written. I removed the dowel pins from my old motor, put them in the freezer for about an hour, and they knocked in pretty easy. And I didn’t get anything mirror balanced and it runs great.
     
  11. immortality

    immortality Moderator Staff Member

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    Dude, you are replying to a post from 2005, clearly OZ38 had replied to the same user IN 2005! so I'd think by now he's either figured it out or burned the car to the ground (or if you knew the user that he's moved onto a completely different project!).

    Welcome to the forum but please don't dig up ancient threads unless you have something constructive to add.
     
  12. OZ38

    OZ38 Member

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    Fixed the "How To" Pics in my earlier post.

    Still disagree with a lot of peoples thoughts on the purpose of the dowels. But hey in th end you do want your happy with.
    Cheers

    Deek
     

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