to fully recondition a z22se to 'as new' would cost something between £1000 and £1500
new water pump, oil pump, bearings, oil seals, head gasket, head bolts, cams, valve springs, valve stem oil seals, valve guides, cam cover gasket, hydraulic lifters, roller rockers, etc
Add to that a rebore and labour to strip and build it.
Most people just go for a rebore and new pistons, which works out much cheaper. The cranks and crank bearings tend to last a long time. Even at 120k they have few signs of wear.
Edited by vocky, 28 February 2017 - 08:24 PM.