I drive a Honda Accord 2004 with the 2.2L N22A1 diesel engine. I had to swap the engine for the same kind a few months back, since the last one started knocking. Since I like to have a spirited drive once in a while, I was taking a corner with full throttle and just before shifting up I saw that the tachometer was reading 5000 RPM, when this engine's redline should be 4500 RPM! Although I was in the red only for a second or two, it still got me wondering how this could have happened. Because this is a heavy diesel engine, would pushing it hard affect it's reliability?
there are some factors that could 'help' engine to go over rev limiter a lil bit! shifting in lover gear when you already in high rpm, than some aggressive driving, as you said cornering could provide some extra inertia from car on engine so it is forced go slightly over rev limiter, and also how precise rpm cluster is, usually they are, but could exists some correction factor there also! and yes pushing hard will reduce engine life for sure, example is if you changing gears between 1500 to 2000 rpm or if you doing it at 3000 to 4000 rpm it means double of moving parts work so, yes
