Demirjian then used a mallet to carefully seat the sleeves into the block. He also gave us some advice on installing the heads. He says, “If using other than factory torque to yield head fasteners, the fasteners must be retorqued after the first heat-up cooldown cycle prior to dyno runs. Failure to do this will most certainly result in a blown head gasket.” Also, keep in mind that MID-specific Cometic head gaskets, available from Darton, must be used. The sleeves were then secured in place and allowed to set up overnight. Note: The Loctite is there just to seal, and not hold, the sleeves in place; that’s eventually done by the heads being bolted on. Sleeved blocks must never be cleaned in a jet wash without honing plates attached or the sleeves will be lifted out of position due to block expansion and will not reseat themselves. This is true even for aftermarket aluminum blocks. The best idea is to stick with hand-washing with warm soap and water.