Fuel Injection
The Kugelfischer injection system is the tii's distinctive feature, and along with the higher compression ratio the Kugelfischer gives it a combination of midrange torque and top end power. The lower front aluminum engine timing cover and alternator mounting location are different from a normal 2002, as well. Tii's also have an extra fitting on the intake side of the engine block for an injection pump oil return line as well as an extra fitting on the oil filter head for the injection pump oil feed line. Look for a complete, intact fuel injection system when identifying an original tii.
An original E12 2002tii cylinder head (late 1972–1974 model year) has no fuel pump mounting holes on it for a standard 2002 mechanical fuel pump. 121/121TI head equipped 1972 tiis have standard mounting holes, but the center pushrod hole is plugged. The fuel pump mounting holes are used to mount the intake plenum on 1972 cars.
Read more about this topic: BMW 2002tii, Identifying A 2002tii
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