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In the past, the engine break-in period was very important to the overall life and durability of the engine. The break-in period required has changed over the years with improved piston ring materials and designs. In reference to small engines, the break-in period now (5–10 hours) is short in comparison with that of engines of the past.
As in any other situation where an engine is rebuilt, there is a "break-in" period for replacement power assemblies that should include operating the engine at varying speeds and loads for a specified period of time to seat the cylinder rings before the engine is placed into normal service.
In early June, Toyota announced the recall of nearly 100,000 Tundra pickups and about 3,500 Lexus luxury SUVs to fix a problem that could cause their engines to lose power while driving.
The Toyota Dynamic Force engine is a family of internal combustion engines developed by Toyota under its Toyota New Global Architecture (TNGA) strategy. These I3 , I4 and V6 engines can be operated with petrol (gasoline) or ethanol ( flex-fuel ) and can be combined with electric motors in a hybrid drivetrain.
This new engine replaced the 1.8 litre F-Type engine fitted to the Laguna Phase 1. The specificity of K4J and K4M engines is that they have a 16-valve cylinder head, similar to the F4P and F4R versions of F-Type engine, over the K4J and K4M engines share the same distribution kit and even water pump that the F-Type engine 16 valves (F4P and F4R).
Piston-based engines are much more complex than turbine-powered engines, and generally have TBOs on the order of 1,200 to 2,000 hours of running time. They tend toward the lower number if they are new designs, or include boosting options such as a turbocharger . [ 3 ]
Also, the inline six engines were replaced by a family of V6, the M112. The new engines featured SOHC heads instead of the previous DOHC, three valves per cylinder instead of four, and twin sparkplugs. The four-cylinder C 230 was replaced by the C 240 (2.6 L) and the I6 C 280 by the V6 C 280.
The term Malaise era refers to a period in the U.S. automotive industry from roughly the early 1970s through the early to mid 1980s, characterized by malaise: poor products and a generalized industry unease [1] — an era of profound adjustment as the U.S. automotive industry adapted to meet wholly new demands for more fuel-efficient, safe and environmentally responsible products.