1.8 8v - MK3 2L 16v conversion?? HELP PLEASE!!

[petegti]

I have just inherited a great mk2 8v gti from a friend, I want to put a 2.0L 16v gti engine from a MK3 into it.
Its a 1989 E plate.

From reading posts on here I have figured that

The mounts are the same

The engine will fit in but sit slightly higher

However I am confused in regard to the wiring, As it is a pre 1990 model how hard will the wiring be to do or what would it cost to get done by a pro?

Also Is it worth me getting a donor car or just the engine, Wiring loom and ECU from the scrappy?

[Veedubgt18v]

i would get a donor car of possible then u know u have everything u could possibly need apart from a custom loom lol

[rubjonny]

If it was me, I'd get the donor car then convert the MK2 to 90 spec wiring, then perhaps fit the MK3 dash as well

As you say the wiring isn't plug & play, but tbh the engine loom is pretty much self-contained and you'll only need to splice a few wires to get it up & running.  You can use most of your existing loom anyway, things like the MFA, oil temp/pressure sensors/radiator fan etc.

You'll need to strip the engine loom down to the bare minimum, then it should be a case of matching the wire colours using various wiring diagrams. I've got loads if you need em

[Judderi]

If your going to keep the mk3 gearbox also you will need to swap your selector box and buy an adaptor to change it from hydraulic to cable clutch.