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• Engines • MK1

  Oxygen Sensor Replacement

  By Eric Southers

  

  
  

  Changing out the Oxygen Sensor is very simple repair. If your Check Engine Light illuminates intermittently while driving on the freeway, most likely it’s an O2 sensor problem. Poor gas mileage could also mean a poorly functioning O2 sensor. The replacement I used is a Bosch #12051, price was $49, and I purchased it from [...]

  Tags: check engine, check engine light, ECU, engine, install, o2, oxygen sensor, removal, remove, reset

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• Engines • MK1

  Radiator Removal

  By Eric Southers

  

  
  

  If you ever happen to work on the coolant system, and have yet to do this, remove the radiator and have it flushed/cleaned out. After 15 years of use, the rad can get quite nasty, especially without proper regular coolant flushes. It’s very easy to do if you already have the coolant system drained. 1) [...]

  Tags: drain, install, radiator, removal, remove

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• Engines • MK1

  Oil Pan Seal

  By Eric Southers

  

  
  

  While I was doing the oil cooler lines and oil filter o-rings, I figured I may as well drop the oil pan and redo it’s seal. There is no gasket for the MR2′s oil pan (actually there is one you can get at Pep Boys/Autozone, but the Toyota BGB recommends using RTV gasket maker). Parts: [...]

  Tags: drain, drop, engine, filter, install, oil, oil pan seal, removal, remove

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• Engines • MK1

  Oil Filter Sandwich O-Rings

  By Eric Southers

  

  
  

  While replacing the oil cooler lines, I went ahead and replaced the oil filter adapter o-rings. I purchased new ones from Toyota, about $6 total. I would recommend changing the oil cooler lines as well if you hadn’t already. Part #s: 90029-20013 & 96732-31060 (need 1 of each, circled in red) Also, the washer for [...]

  Tags: belt, drain, engine, filter, install, o rings, removal, remove

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• Engines • MK1

  Intake Filter Mod

  By Eric Southers

  

  
  

  *Applies mainly to 85-86 NA MR2s. 87+ MR2s have their Intake filter mounted in the trunk. However, if you wish you can follow this writeup & move the filter into the engine bay like the 85/6s. This is a very common modification for the MKI MR2s and usually the first people do. The stock air [...]

  Tags: air filter, cleaning, engine, filter, install, removal, remove

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• Engines • MK1

  Throttle Body Cleaning

  By Eric Southers

  

  
  

  It’s a good idea to clean up the throttle body every so often, as the oil vapor in the PCV system condenses on the cooler walls of the intake. This leaves a nice oily scum, which could potentially cause problem with the throttle butterfly valve. 1) Remove the air filter & AFM. See the intake [...]

  Tags: adjust, air filter, CEL, cleaning, drop, filter, install, removal, remove, spring, throttle

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• Engines • MK1

  Ignition Timing

  By Eric Southers

  

  
  

  Here’s just a little writeup to help you with checking and adjusting your ignition timing. Here’s what you need: A timing light that you can purchase from Autozone, Pep Boys, etc. It runs between $25-$100. I picked up the inductive kind, that way I don’t have to worry about messing with the spark plug wires, [...]

  Tags: adjust, ignition, timing

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• Engines • MK1

  Thermostat

  By Eric Southers

  

  
  

        Here’s just a short write-up for changing the thermostat.1) Drain engine coolant. It’s quicker to just tear the housing apart without the pain of draining the coolant, but that way is quite messy. Either way, make sure the engine has cooled 2) Below marks the location of the thermostat housing. To reach [...]

  Tags: air filter, CEL, install, removal, remove, thermostat

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• Engines • MK1

  Alternator Replacement

  By Eric Southers

  

  
  

  Note: This only pertains to the N/A MKI MR2s since the SCs alternator is located on the exhaust side of the engine. Got the 3 warning lights (Charge, Cooling Fan, Brake) on your dash shining in your face? Bad voltage regulator that is built into the alternator. Got one warning light (Charge) on? But don’t [...]

  Tags: adjust, alternator, belt, drop, engine, install, removal, remove, replacement, tensioner

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• Engines • MK1

  Throttle Position Sensor Adjustment

  By Eric Southers

  

  
  

  Having never done this before and with a faster than normal idle speed, I decided to check out the TPS. First, I checked it out while it was installed on the car. But, then after I could not remove the bottom TPS screw to make the adjustment, I ended up removing the entire throttle body. [...]

  Tags: adjust, sensor, throttle

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