Summary

00:00 - Kyle has asked, does sleeving a cylinder affect the taper? OK so if you are going to be sleeving a cylinder, this is normally either a repair process, if you've got a factory block that has some damage to one particular bore, this often can be recovered by sleeving.
00:17 So in this instance we're generally going to be having our machinist press in a relatively thin iron sleeve to recover that particular cylinder.
00:28 You do need to be careful with this because generally this process, there's an interference fit with those sleeves and it can actually distort neighbouring cylinders.
00:37 In a performance application when we talk about sleeving, generally we're talking about fitting something like a Darton ductile iron sleeve in place of the factory aluminium sleeve, so that'd be a process we'd use here on our Subaru FA20 potentially.
00:52 Strengthens the block and gives a lot more regidity to the block.
00:55 Now in both of those instances though we're going to be fitting a sleeve that is as supplied and fitted going to be undersize and that then allows the flexibility for the machinist to bore and hone that to the finished size.
01:08 So to specifically answer your question there, this allows the machinist to remove any taper or out of round in that particular cylinder and we should be able to get theoretically perfect results, our cylinder should be perfectly round and our cylinder should be taper free, nice and straight from the top to the bottom.
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