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are d series blocks interchangable ?

Discussion in 'Engine Building' started by Kobischka, Apr 30, 2008.

  1. Kobischka

    Kobischka New Member

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    I just wanted to make sure if d series engine blocks are interchangeable before I purchase one.
     
  2. LS_VTEC

    LS_VTEC you get the BRAKE

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    Yes.
     
  3. NightCat

    NightCat New Member

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    They're not ALL interchangable.

    If you want to run a VTEC head, some blocks dont have valve relief on the piston heads to allow VTEC.

    For instance, dont by a D15B6. (CRX HF motor) cause it wont allow for a VTEC head to be mated with it.
     
  4. hondacivicdx92

    hondacivicdx92 Hamby

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    you cannot runa a d16 head on a d15 block without some modification
     
  5. BrutalB83

    BrutalB83 Brutal Moderator Moderator VIP

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    Uh...pretty sure people do it all the time...it's called a "Mini-Me"...
     
  6. K2e2vin

    K2e2vin Senior Member

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    Wow, the misinformation.

    Only physical engine mod needed to make a VTEC head work on a non-VTEC block(88-00 years), is removing the oil restrictor between the #2 and #3 cylinders.

    A VTEC head will bolt onto a D15B6 block, and a D15B8 block for that matter.
     
  7. LS_VTEC

    LS_VTEC you get the BRAKE

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    That isnt a valve relief, that is the quench area on the dome of the piston. Which also has nothing to do with the operation of vtec in any way whatsoever. All D-series blocks are of the same casting, just like the B-series.
     
  8. K2e2vin

    K2e2vin Senior Member

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    What do you mean by casting?

    I know there's issues with PM3 pistons and milled VTEC head. The non-VTEC pistons have valve reliefs that are in a different position than the VTEC heads....although I've never seen anyone run into this issue with the P29s. The PM3's higher compression height is probably the cause of it though. Otherwise; there are guys running VTEC heads on D15 blocks with zero problems
     
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