Kopi-peist E30 zone wiki lehelt: BlockThe M20 block is a cast iron design with six cylinders bored out to make the various engine capacities from 2.0 to 2.7 litres. The block can be identified by checking the number stamped on the intake side of the block, on a machined flat area just above the sump seal. Type number will start 20 ,25 or 27. In design, all M20 engine blocks are the same. In practice, two blocks exist; the 80mm bore block which forms the heart of the 320i and 323i, and the 84mm bore block which makes the 325i and 325e. There is no reason why an 80mm block could not be bored out to 84mm. Bear in mind that although the M20 engine was also fitted to the E34, engines from that car have the dipstick located in the sump. However, an aperture exists on the block, ready to be tapped, and the sump fitted to E30s bolts straight on to relocate the dipstick to its normal position if you wish. But an E34 sump will fit an E30. Selle loogika järgi peaks otsima B20 või B23 ploki, millel korrosioon poleks veesärki hambaid löönud ning peaks hakkama saama. Keegi teab kedagi kellel selline teooria ära katsetatud on? B25 ploki maksimum pidada olema 86,2mm aga noh, selle andme kindlus on ka nagu kogu internetis leiduv - ei pretendeeri absol. tõele.