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b16a1 vs b16a2

Discussion in 'Engine Building' started by h1coupe, Dec 5, 2003.

  1. h1coupe

    h1coupe Member

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    i am restoring a hydrolocked b16a2 (obd-1 gray plug)motor!
    the thing is the block is scrap!
    and i´m looking for a new one!
    so the question is is there a difference between the b16a1 obd-0 block and my block( i am talking about just the bare block with nothing in it)?????????
     
  2. dohch22a4

    dohch22a4 Senior Member

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    There is no difference between a bare SiR and SiR II.
     
  3. JDMilan

    JDMilan Senior Member

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  4. MaaseyRacer

    MaaseyRacer Senior Member

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    if you are talking about the actual casting of the block, no one has been able to tell me that there is any differance. And all the parts from previous and current B16 engines are interchangable as along as the OBDs match and what not. Interms of internals the OBD0 b16 and the B16a2 have the same compression pistons. However the SirII has slightly high compression pistons, and I think more agressive cams.
     
  5. simplyfast

    simplyfast Senior Member

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    the question really is whats wrong with the block?

    i have a friend who hydrolocked his, snapping a rod, and the rod punching a hole in the block. the block can be re-welded and then posted to regain strength.

    the pistons are different also. there is a compression raise from 10.2 to 10.4. i know this because i have a pr3 sir in my car, and i am building a p30 sirII in the garage. the dome height on the p30 is ever so slightly higher.
     
  6. h1coupe

    h1coupe Member

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    that´s what happened to my block the guy who had it hydrolocked it and it snapped a rod and it looks like a mess around where the rod connects to the crank it punched a hole on both sides!
    if there is a chance to have it welded then i will check that out:)
    thanks!
     
  7. simplyfast

    simplyfast Senior Member

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    if you re-weld it, make sure you post it, or all the time and money youve put into it will be a waste.
     
  8. h1coupe

    h1coupe Member

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    post it? what is that?
     
  9. simplyfast

    simplyfast Senior Member

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    The posting process involves machining and tapping holes in the thrust sides of the block and torquing in threaded aluminum “posts” that physically “connect” the outer part of the cylinder with the outside (peripheral) walls of the block. With these “posts” installed, if the cylinder walls are going to move, they have to move the outside walls of the block too, so they add a tremendous amount of strength, making the block capable of withstanding a lot of abuse. This modification also has no ill effect on cylinder cooling, which is something I’m big on these days.

    Endyn webpage. This will explain a whole lot.
     
  10. cws13

    cws13 Senior Member

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    If budget is a concern, I've said this 20 times...go to your local Acura dealer, cruise thier junk pile, find an LS (you will) and ask for it. I've gotten two free LS motors and turned down 3 more last month. They just pile them up and scrap them. They ALWAYS repair GSR and Type-R's because of how much the heads are worth- but the LS isn't worth shit to them. Before you try to have a B16 welded, posted, repair a sleeve etc.- you can totally work over your free LS longblock to accept you B16 head. ;)
     
  11. xj0hnx

    xj0hnx I wanna be sedated VIP

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    But to answer the question, yes there is a difference in the two blocks. The thermostat housing is different.
     
  12. h1coupe

    h1coupe Member

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    i don´t think that would work over here on Iceland:)
    i think there are about 10 integras in the whole country and 6-7 of them are type-r the rest are ls i think and only one of those has been crashed and i know the guy that is rebuilding it:)
    so i could search and search and i wouldn´t find anything :p so my best option is to find a block over there and have it expensively shipped to Iceland :(
     
  13. cws13

    cws13 Senior Member

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    Wow, hats off! Talk about being dedicated. That being said, do you have a machinist you trust? I know where an 90' LS Longblock is right now. If you do the legwork on finding out shipping cost, I'll see about sending it to you. It needs a rebuild, but was running when it was pulled. I didn't have room for another, but if it's still there- it's yours. Shipping will be high, but I've been investigating getting a line straight from Japan, and even those aren't that bad. Good luck.
     
  14. JDMilan

    JDMilan Senior Member

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    doesn't the water line in the rear run differently also?
     
  15. civicious

    civicious FüK-VTEC VIP

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    what happened to the thread about the dude that threw a rod, and jb welded the block, and it worked?


    was that on here?
     
  16. h1coupe

    h1coupe Member

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    will it work together if i have everything obd-1 and i get a obd-0 block will the thermostat housing cause problems?
     
  17. xj0hnx

    xj0hnx I wanna be sedated VIP

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    As long as the fan switchplugs in, it's ok. Just make sure when you buy those parts, to get them for that block.
     
  18. h1coupe

    h1coupe Member

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    thank you! you have been a great help!
     
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