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LS all motor Question

Discussion in 'Engine Building' started by 89CivicH/B, Oct 4, 2006.

  1. 89CivicH/B

    89CivicH/B New Member

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    I'm trying to build an all motor LS for my 89 Hatchback. I got the P30 pistons and had them dropped off at the machine shop to remove the pistons. But they said heating the pins to press them out would probably crack the piston itself. Is this common or is there any other way to remove the piston than by using heat? Also if I have to buy new pistons what year model exactly am I looking for and are the PR3's the same as P30's?
     
  2. lsvtec

    lsvtec GNU/Linux Evangelist

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    A friend of mine had P30 pistons removed from the stock rods to use in his LS and all went fine.
     
  3. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    really heat is the only way I know how to do it.

    it shouldnt crack the piston if the guy doing it knows what hes talking about. your combustion chamber temps are 1300 + degrees. I dont think the 600-700 degree temps of that oven are gonna keep that pin from coming out.
     
  4. 89CivicH/B

    89CivicH/B New Member

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    Thats kind of what I was thinking. But he's a very reputable shop and he said he could try it, but wanted to give me a fair warning. What about buying new pistons though....what number is equivilant to that of the P30's and give me the same comression and fit on my B18 rod?
     
  5. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    Honda Automotive Parts

    item 1 50 bucks each.

    those are pr3 pistons. getting p30 pistons new requires going through an importer.
     
  6. lsvtec

    lsvtec GNU/Linux Evangelist

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    That warning was also given to us.
     
  7. ef8

    ef8 Junior Member

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  8. 89CivicH/B

    89CivicH/B New Member

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    Is that $150 for a set??? Also will the PR3's fit on my B18 rods without modification?
     
  9. 89CivicH/B

    89CivicH/B New Member

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    I just want to be sure if someone could answer, will the PR3 pistons fit on my LS rods without milling or any modification to the rods?
     
  10. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    cant say 100% but i am almost sure that the rods DO need to be milled to fit.
     
  11. 89CivicH/B

    89CivicH/B New Member

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    So only stocks and P30 will fit no mods needed....hmmm. I'm going to try to get these P30's to work then. Thanks
     
  12. tartymctang2357

    tartymctang2357 Grand High Wizard

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    pr3's will fit your stock rods, the only time the stock rod needs to be milled is to fit any of the r-type pistons on, (gsr,itr,ctr)
     
  13. GSRCRXsi

    GSRCRXsi Super Moderator Moderator VIP

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    you can get p30's brand new from hmotorsonline.com
     
  14. 89CivicH/B

    89CivicH/B New Member

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    See thats what my machinist said he thinks will happen....it will crack at the pin because of the heat and pressure applied to that one area. I think I'm just going to get new pistons just to be on the safe side and not have to worry with sticking used parts in my engine. Thanks so much for everones input. Now I just have to decide what cam to get. I'm thinking of using Brian Crower's BC0022 cam....its just a little hotter than the Crower 403 cam and costs less.
     
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