If I recall correctly, the VVTI engine has the lettering cast into the aluminium rocker cover on top of the engine. The D4 can be recognised by a large plastic cover over the engine with embossed D4 lettering. It is a proven system, effective and very trouble free. This engine type is a lot more conventional and improves performance by optimising valve timing. VVTI stands for 'Variable Valve Timing Induction'. This often leads to expensive, unnecessary and time consuming repairs. Unfortunately these problems are not that easily sorted out with little product knowledge on these engines available within the industry. In theory the D4 engine is very good and is an advancement on the VVTI however, history has shown it does not take much to upset the engine performance and issues such as surging, rough idle and engine stutter are not unusual. The idea behind this concept is to allow the engine to run leaner producing less emissions and lower fuel consumption. During the combustion process, air is compressed and at a very precise moment fuel is injected directly into the combustion chamber. In the D4 engine, fuel is injected under very high pressure into the combustion chamber itself (direct injection). With the VVTI engine, fuel is injected into the inlet manifold to mix with the air prior to entering the combustion chamber. While both have similar internals, the big difference is the way the fuel is injected into the engine. The two engine types are quite different however. The Toyota Nadia is a good replacement for a Carib. MODEL, ENGINE, DOOR, T/M DRIVE, Dimension, WEIGHT, MSRP, Find Used Cars.

Toyota vista d4 engine nadia