Well my 99 Civic's engine died and it had a D16Y8 and what I want to know is if I want to get a B18 series engine instead what do I have to change? Like do I have to change tranny, wiring harness, axels, ECU, or anything like that. I need help right away thanks.

yes u have to change everything u just said. just not the wiring harness.both motors will plug in to the same harness.

Thanks for the help.

i know you aren't really asking for this advice, but i would go with the b16b instead. b16b has more horses than MOST b18 (those b18's that have more horses, the difference is only a couple hp), and you still get amazing gas mileage (IMG:style_emoticons/default/smile.gif) . just something for you to think of.

Thanks for the help the B16 would probally be cheaper than the B18 I would assume?

There are many engine choices for each vehicle so we’ll cover all of them. First it’s important to understand that On Board Diagnostics play a large role in which engines are easiest and recommended. All Honda’s 1991 and earlier are considered OBD 0. This means that the engines don’t utilize any oxygen sensors and have little in the way of emissions control. Next there are OBD 1 engines that are found in all cars from 1992-1995. These vehicles have traditionally been the best platform for the most “factory-like” hybrids. Finally, anything from 1996-1998 is OBD 2. 1999-2000 is OBD 2b. It’s also important to remember that its only legal to swap in engines of the same or newer OBD series. That is to say that an OBD2 engine can be placed into a 1988 CRX legally and without many wiring problems. Consequently its illegal in most states to use OBD 0 engines in cars that should have OBD1 or OBD2 power plants. Of course there are people who disregard these laws and regulations but its not recommended or necessarily that easy.

In your case B18A: Mount kit required
Transmission: S1, J1, A1, Y1 or YS1
Shift Linkage: Need adjustable shift linkage from Hasport or shortened shift linkage from 90-93 Integra
Axles: B18B Axles
Wiring: For Si, EX, and HF (port injection) models modify the engine harness to fit. DX, LX, and Standard (dual point injection) models the wiring needs to be modified for port injection. Custom wiring harnesses are available for dual point injection applications from Hasport.
Upper Radiator Hose: 92 GSR, trim to fit
Lower Radiator Hose: 90 Integra, trim to fit
Throttle Cable: 90 Integra
Clutch Cable: Stock
Air Conditioning: Use Hasport AC bracket with stock AC compressor.
Chassis Prep: Make a dent on the left-hand frame rail for alternator pully clearance.

OBD1-OBD2 Engine Swaps into 89-91 Civic/CRX

To install an OBD1-OBD2 engine into your 4th Generation Civic/CRX the following adjustments will need to be made. First, if your car has dual point injection a conversion will need to be made to port injection. All Integra's 1994 and up and Civic's 1992 and up all use hydraulic transmissions. Therefore its not compatible with 4th Gen Civic's because these vehicles have cable transmissions. To complete the swap a B-series cable transmission will need to be used or a cable-hydro transmission conversion will need to be made. The left side bracket needs to be changed to a 1990-1993 Integra bracket.
For the ECU, it is best to use the ECU which belongs with the engine. Several wiring adjustments will need to be made to make the engine run correctly.
For LS-VTEC's, CRVTEC's and other Frankenstein's it is easiest to use the ECU that corresponds to the distributor and head. There are also reprogrammed ECU's which can be considered.

Good luck!

Wow the help is greatly appriciated!