For a long time I drove with the crankcase ventilation hose pulled down. a few months ago I restored the crankcase ventilation system + installed an oil trap.Oil has appeared in the oil catcher, which indicates that the piston group is gradually wearing out (for reference, regarding the monster QD32 - it can wear out for years).. And a logical question is brewing... change the engine or repair the engine. I looked at the cost of a used engine - I was horrified.. equal to the cost of a car, which is inadequate..I'm thinking of this scheme:- boring the cylinder block for piston liners (standard) (since the QD 32 does not have liners, although its brother TD27 has liners).- Purchase and selection of liners (previously I found out that they are suitable from Toyota KZ1, it will only be necessary to bore them for QD32 pistons)- troubleshooting and replacement of pistons - I’m thinking of buying used Japanese pistons + new rings, since buying Chinese ones is scary. New Japanese pistons are now unavailable to us, like many Japanese spare parts...- troubleshooting, grinding of the cylinder head, milling of valve seats.Since theQD32 will take a long time to die, I think I will devote the next year to purchasing the necessary parts for future engine repairs.I plan to entrust the work of boring, milling and grinding to a workshop. And I will do the engine assembly myself.Strange plans as always)