4AGE 20V Blacktop

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Diary of Swap
Cooling System


85/6 4AGE -> 4AGZE

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Air Intake Filter
Clutch Slave Cylinder
Clutch Master Cylinder
Coolant Flush
Distributor O-Rings
Exhaust Manifold
Fuel Filter
Fuel Pump Cut-off Switch
Ignition Timing
Oil Cooler Hoses
Oil Filter Adapter O-Rings
Oil Pan Gasket
Oxygen Sensor
Radiator Removal
Throttle Body Cleaning
TPS Adjustment
Water Pump


87+ Brake Upgrade
Caliper Rebuild-Front
Caliper Rebuild-Rear
Dust Shield Removal
Parking Brake Cable
SS Braided Brake Line


Ball Joint Replacement
Bushings Install - Front
Bushings Install - Rear
Steering Knuckle Removal
Struts/Springs - Front
Struts/Springs - Rear
Sway Bar End Links


87+ Antenna Replacement
Clear Turn Signals - Front
Clear Turn Signals - Rear
Door Hinges
Interior Door Triangles
Interior Headliner Painting
Interior Trim & Light Lens
Power Window Regulator
Rekeying Trunk Lock
Rust PM - Battery Bracket

Rust PM - Front Wheel Wells
Seats - MK3
Seats - Aftermarket
Shift Boot

SideMarker Mod

Sunroof Rattle
Wiper Switch


2006 Austin
2005 Austin
2005 Topeka NA2005
2004 Galveston
2004 Chattanooga SE2004
2003 Galveston
2002 Austin


Suspension Setup Pics
My MR2 Diary
Latest Pics of My MR2

4AGE 20V Blacktop Engine Swap Project Diary


This page documents the swap of a 4AGE 20V 'Blacktop' engine from a '97 Toyota Sprinter Trueno BZ-G into my '85 MR2. I will try to provide as much info as possible to help anyone who is contemplating doing this swap.

Diary of the Swap

  • Intro - The story of how I obtained it & pics of the half cut before starting disassembly
  • Day 1 (10/14/02) - Removed fenders & hood
  • Day 2 (10/15/02) - Removed dashboard & steering wheel
  • Day 3 (10/16/02) - Removed radiator, lights, & intake
  • Day 4 (10/17/02) - Removed PS pump and AC compressor
  • Day 5 (10/19/02) - Removed wiring harneses & engine ready to be pulled
  • Day 6 (10/21/02) - Just a few pics of the engine before it was pulled
  • Day 7 (10/23/02) - Pulled engine from clip
  • Day 8 (10/24/02) - Continued stripping what was left on the chassis (ABS system, steering rack, etc). Labeled all connectors on body & engine harnesses. Pics of all connectors to come another day.
  • Day 9 (10/25/02) - Finished stripping chassis of calipers & sway bar. Left strut assemblies in tact so that I can roll the half cut around by its wheels. Chassis is ready for the junkyard.
  • (10/26/02-11/06/02)- Have just done a few random things the past few days. Got rid of chassis, messed around with body & engine harness & put together their web pages linked below. Replacement Magnecor spark plug wires were found to fit. Removed injectors and will send them out to be cleaned & flow tested.
  • (11/07/02-11/23/02)- More wiring stuff.
  • Day 10 (11/24/02)- Removed downpipe flange & crank pulley. Magnecors received, injectors shipped. Update: Injector report.
  • Day 11-12 (12/6-7/02)- Dropped 16V engine from the MR2
  • Day 13 (12/15/02) - Started the C56 tranny conversion to work with the MR2 shift linkage
  • Day 14-15 (12/30/02) - Started cleaning & painting parts of the engine
  • Day 16 (1/9/03) - Battery tray removed, clutch slave cylinder rebuilt
  • Day 17 (1/18/03) - C56 tranny adapter piece fabbed
  • Day 18 (1/19/03) - MR2 interior stripped to expose wire loom, ELS# wires tapped, evaporator removed
  • Day 19 (2/1/03) - Engine harness update, tranny parts reassembled, engine bay painted, shifter bushings installed
  • Day 20 (2/8/03) - Just some clean up and attempt to mount flywheel/clutch. Find out I had ordered the wrong set! doh! That delays things a couple weeks.
  • Day 21 (2/21/03) - Proper clutch/flywheel installed, ARP flywheel bolts, 20V engine mounted into MR2, clutch & shifter linkage hooked up.
  • Day 22 (3/12/03) - Parents visited for a week. So that's the reason for the most recent delay. Interior put back together. Interior wiring looms laid in place. Positive battery cable routed from front trunk to the engine bay.
  • Day 23 (3/15/03) - Speedsource SS clutch line installed, coolant system lines routed, 87+ taillights installed, ECU mounted in trunk, ignitor/coil mounted, engine harness connected, spark plug wires connected
  • Day 24-25 (3/27-28/03) - Coolant system finished, AFR gauge mounted, Battery mounted in front trunk, throttle cable extended & new bracket fabbed, fuel line extended
  • Day 26 (3/29/03) - Exhaust system fabricated
  • Day 27 (3/31/03-4/5/03) - Timing belt arrived, O2 sensor flange mounted, car started for first time, transmission dropped to fix clutch problem, Project complete!


20V Engine Harness Connectors - Pics of all connectors on the engine harness taken from the 20V clip. (Still not complete, maybe one of these days it will be)

20V Body Harness Connectors - Pics of all connectors on the body harness taken from the 20V clip. (Still not complete, maybe one of these days it will be)


Links to other 20V Swaps

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Thanks for Visiting! - Eric Southers

Disclaimer: This web page in no way replaces the MR2 repair manual. Follow what it says before me. The purpose of this page is to give you a better pictorial description of what to do. I cannot be held responsible for any mishaps caused by this web page.