LS7 on ainoa LSx-lohkoista, jossa on sylinteriputket prässätty, mutta siinäkin poistaminen tehdään koneistamalla vanha putki pois.
Race Engine Development kommentoi asiaa näin:
Quote:
Darton makes both wet MID and dry Seal Tight liners for the GM alumimum blocks. Either style will fit the Gen IV blocks. The Gen III are MID only because the blocks are not siamese bore as are most all Gen IV blocks.
The LS7 blocks have pressed in gray iron liners unlike all other Gen IV blocks, LS2, LS3, 5.3 truck, etc. that have cast in gray iron liners. It is however not possible to simply press out the LS7 liners, they are machined out in my case. The only other method to get them out is to run a weld bead vertically in the sleeve which shrinks them enough to loosen them for removal.
The Darton Seal Tight ductile iron sleeves are roughly four times stronger than the gray iron factory liners. They will not crack like the factory sleeves.
You do need a CNC with flood coolant to install the dry or MID sleeves. Tolerances are tight (+- a half thou on bore spacing) to achieve a perfect job.
I also vibratory stress relieve the blocks (they are not heated) during and after the machining process to stablize them so they don't distort when put into service.
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