does a 1990 honda prelude 2.0 s.i have a pilot bearing
No, the third and fourth generation are a different Chassis.
NO, they have two completely different motors.
show me picture of where the water pump is located on 1991 Honda prelude si
It's hard to say, as the question didn't specify what kind of solenoid are you attempting to fit, and the 1990 Prelude had a mid-cycle refresh which included an improved motor.
the fuel rail
1990-91 Honda Prelude Si, not the 2.0si
No. The Prelude has a B20A5 motor. The civic will have a D-series tranny. They will not interchange (B and D series parts do not interchange).
4 x 100 mm
Mounted on top and inside the fuel tank.
On a 1991 Honda Prelude 2.1SI, the Oil Sensor is located slightly above the Oil Filter.
the B21A 2.05ltr
If the Prelude is an automatic, yes, you use automatic transmission fluid. If it's a manual, there's manual transmission fluid. As much as possible, purchase the manufacturer (Honda) branded transmission fluid.
they would fit but your car would run rich because the 90 prelude is a 2.0 the other one is a 2.2 or a 2.3
i wouldn't swap it, the 87 is carbureated and the prelude is fuel injected, just put the same engine in. the 87 accord engine has less hp .
Buy a syphon hose at hardware store or Wal-Mart
Yes it is - only when idling and if I turn the heater on it cools down - thermostat?
None. Airbags were not introduced (driver's side only at the time) until 1990.
It should. There's very little mechanical differences when the mid-cycle refresh took place in 1990. Most of it was cosmetic, and the B21 series motor that replaced the B20 in the 1988-89 model years should still bolt on the same.