2003 Ford Ranger
ALH Install

2003 Ford Ranger 4x4

Table of Contents


Please note this is a current work in progress and we will be updating this as we go along.

  • 2020-DEC-2 First Publication (introduction, details on removing TDI from donor vehicle)

The Recipient Vehicle

We found a nice 2003 Ford Ranger "Edge" 4x4 with a manual transmission. This truck spent it's life in the lower mainland of British Columbia, so it experienced very little winter road conditions so its a very clean and rust free vehicle. The original motor is a 4L V6 making 238ft.lbs and 207hp and consuming about 12L per 100km on 4.10:1 final drive ratio.

Plans for the truck include is to make a comfortable highway and back road vehicle:

  • 235/85R16 tires (31.7" tall) for additional ground clearance, and to have an optimal 100km/h engine speed of 2100 rpm, verses 2350 with the original height tires.

  • Extensive sound proofing to make it as quiet as the original gasoline engine.

  • Ensure optimal cold weather performance and comfort with the installation of engine insulation and a Diesel powered coolant heater.

The Donor Vehicle

We purchased a 2003 Jetta TDI with an automatic transmission with the "ALH" engine code. We chose to get an automatic transmission donor because these motors have an 11mm injector pump, where as the manual transmission motors have a 10mm pump. 11mm pumps are beneficial as they atomize fuel more efficiently as we can use smaller injector nozzles to make the same power as compared to the 10mm pumps. Smaller nozzles atomize fuel better larger nozzles, this is important as it helps keep engine temperatures down, allows for easier cold starting and a smooth idle.

Plans for the motor include:

  • Upgrade it to Stage 4 performance

    • 0.216mm injector nozzles

    • 1749VB Turbo Kit

    • Malone Tuning Stage 4 Software

  • Water cooled intercooler so that we can retain the original Ford radiator system due to the air conditioning.

  • Insulation of the oil pan and cylinder head to retain as much heat as possible and to make it as quiet as possible.

Removal of TDI from Donor Vehicle

Electrical system cores

I am not going to detail the removal of the engine from the Jetta as I think it's pretty straight forward. Just remember, these cars are assembled by robots and the simplest way to remove the motor is to drop the subframe and then remove the motor and transmission from that assembly out side of the car. This YouTube video shows how the MK4 Golf are assembled, and you can see how easy it is for VW to install the motor, it's that easy to remove!

When done, we need to have the following items sitting on your garage floor from the engine compartment:

  • Engine with belt driven accessories and turbo charger

  • Fuel Filter

  • Coolant and Power Steering Reservoirs

  • Electrical system (ECU, both harness that plug into the ECU, MAP sensor, N75 valve)

Removal of V6 from Recipient Vehicle

Ford Engine Harness before trim

Ford Engine Harness after trim leaving only the reverse lights.
More will be done to this later - don't leave open wires!

Remove the V6 motor from the Ranger. Again, I think most know how to do this. So I'll spare the details.

Modifying the Original Equipment Engine Harness

When removing the motor, there is a square electrical connector that interfaces the engine to the vehicle. On the engine is the male side of that connector that goes to the Power Control Unit in the dash and goes under the cab to the transmission.

Assuming we are dealing with a Manual transmission Ranger (automatics are different), the only thing that is necessary to retain is:

  • Cable going under cab: Reverse Lights, where VIOLET/ORANGE is 12V supply and BLACK/PINK is reverse light connection.

Everything else is for the O2 sensors and the OSS (BLUE/YELLOW) which are not required. All those wires can be removed from that cable. leaving just a single pair. Ensure to leave ample wire to make connections to later on. See Pictures!

Alternator / Air Conditioning / Starter Wiring / Oil Pressure

This harness goes to the Battery, Alternator, Starter, AC compressor, and Oil Pressure Senders and terminates at a black plug located under the master cylinder. As we are going to be using the Volkswagen Alternator, and the Starter is located on the passenger side of the motor we can remove all the heavy power and ground wires right to the black fuse box where it attaches with a 10mm nut.

Retain the following wires that go to the black plug under the brake cylinder:

  • All wires going to the AC compressor (RED/TAN BLACK/WHITE & GREY/WHITE BLACK)

  • Starter Trigger Wire (YELLOW/GREEN)

  • Alternator Wire Charge Light (GREEN\RED)

  • Engine Oil Pressure (GREEN\WHITE)

As of March 15, 2021 we have remove the motor and all unnecessary wiring. Next is cleaning the engine bay and sound proofing.