Toyota engine codes

Toyota's engine codes follow a series of logical naming conventions, which unlike those of some other companies, make it possible to know something about an engine without having anything but the code.

Toyota Engine Codes have two groups of characters, separated by a dash. The first group tells you which series the engine is from (designated by a letter or letters) and which revision version it is. For example, the 4A and 7A, the 1JZ and 2JZ, the 2T and 3T are all pairs of engines which have common 'ancestry' and most likely share many interchangeable parts.

A short list of the most common (and well known) first group letters include:

• A - found in many 80's Corollas, MR2's and some Celicas. - I4, between 1.6 and 1.8L
• UZ - found in some Soarers. - V8, 4.5L
• JZ - found in Soarers and Supras - I6, between 2.5 and 3.5L
• S - found in Celicas and MR2's - I4, 2L
• T - found in many 70's Corollas and assorted commercial vehicles.
• R - found in 70's Celicas, Coronas and Hiluxes - I4, between 1.8 and 2L
• G - found in some Supras and Soarers. - I6, 3L
• ZZ - found in 90's Celicas and some more recent Corollas and MR2s. - I4, between 1.8 and 2L
• M - found in 80's Celicas, Supras, Cressidas, Crowns, and Camrys - I6, between 2.4 and 3L

Feel free to /msg with additions/corrections to this list.

After the dash comes another string of characters, which designate things like what sort of head the engine is equipped with, whether it is turbocharged or supercharged, what emissions control systems it comes with, etc etc.

Here is a list of the most common 'second group' characters and what they mean.

• C - Equipped with an emissions control systems. The C notation is also associated with California, as at one stage California had the most strict emissions controls in the continental USA. Often mistakenly assumed to stand for 'carburettor'.
  
  
• U - Equipped with emissions control systems for Japan. (The U notation has also been associated with the introduction of Unleaded fuel in Japan.)
  
  
• E - Electronic fuel injection. (EFI)
  
  
• i - Single point fuel injection.
  
  
• F - Dual overhead cam (DOHC) head: 'economy' type narrow valve angle head.
  
  
• G - Dual overhead cam (DOHC) head: sports type wide valve angle head.
  
  
• L - Transversely mounted in vehicle.
  
  
• T - Turbocharged.
  
  
• Z - Supercharged
  
  
• D - Diesel.
  
  
• B - Twin Carburettors. Only used in non-twincam engines, this code is now obsolete.
  
  
• R - Air injection.
  
  
• LPG - runs on LPG.
  

Feel free to /msg with additions to this list too. ;-)

Thus, a 4A-GE is a 1.6L dual overhead cam engine, with a wide valve angle, and electronic fuel injection.
A 1JZ-GTE is a 2.5L dohc engine, with wide valve angle, EFi, and a turbocharger.
A 1UZ-FE is a 4.5L V8 with narrow valve angle, and EFi.
And a 4A-C is a boat anchor.

Source: Helene and Matti's Toyota Page: http://come.to/helene-and-matti