crankcase sealer?

Discussion in '2-Stroke Engines' started by keystone, Oct 22, 2009.

  1. keystone

    keystone New Member

    I read and seen the teardown pics from I believe was from AL.fisherman. I've never seen anyone say what they use for a sealant between the case halfs. just for future referance, are these cases machined at close enough tolerances to use gaska-cinch or yama bond like the old 70,s dirt-street bikes
     

  2. clay

    clay Member

    hondabond, yamabond, any of those. if you seal the cases without the gasket you will need to remove the same amount of shims from the crank, behind the bearings
     
  3. keystone

    keystone New Member

    Thanks clay,I wasn't positive if they used gasket between the case halves
     
  4. tacoshell4

    tacoshell4 Member

    hondabond baby. if thats not available to you try permatex moto seal and threebond 1104
     
  5. tacoshell4

    tacoshell4 Member

    grubee tend not to my pk has a gasket all through the motor covers and all not my grubee
     
  6. Porkchop

    Porkchop Member

    That's strange. I recently went through a brand new Grubee 50cc and it has a full gasket. No metal to metal contact at all, anywhere between the crank case halves.
     
  7. tacoshell4

    tacoshell4 Member

    maybee the guy who sold me my kit opens them an takes the gaskets to sell in his store
     
  8. Al.Fisherman

    Al.Fisherman Active Member

    Although there are a number of items that can be used to seal the case halves.....I wrote...

    Photo 59 of 59 This is what I used. Tap tap with a hammer two or three times and the case separated. Clean off gasket on both surfaces and as I said before you put back together, use Indian Head/Permatex sealer. Use a base gasket, as without the piston will hit the head. This is far as I had to go; I didn't have to split the crankshaft to remove/repair or replace the connecting rod or bearing/bushing. Easy to see how this is done. Machine screws are holding the (2 piece) crankshaft together much like the case.

    We never used a gasket between the case halves in the many Volkswagen engines we built years ago.
     
    Last edited by a moderator: Dec 15, 2015
  9. clay

    clay Member

    i feel the need to repeat myself. IF YOU USE SEALER INSTEAD OF A GASKET, YOU WILL HAVE TO REMOVE SHIMS FROM THE CRANKSHAFT. NO MATTER WHAT.
     
  10. Porkchop

    Porkchop Member

    I doubt that. You can buy those gaskets for aorund $3.00 or $4.00. More trouble to take the engine apart just for that. Who knows why your engine didn't have a gasket ?
     
  11. keystone

    keystone New Member

    Amen to the v-dub engines,back in the 80's if i had a dollar for everyone I rebuilt i'd be a hundredaire. Those cases had a wider contact area, and we used permatex aviation sealer.I removed the base gasket on my HT 2 weeks after I bought it in 2007. Sealed it with GM red anerobic sealer other than had to dremmel the outer edge of the combustion chamber so the piston would't hit the head. It makes sense that if these engines come with a crankcase gasket and you remove you have to compensate for about .020 of an inch to get the correct crank end play and/or preload on the main bearings.
     
Loading...