One Wrong Downshift Can Wreck Your Engine 🔴 #Shorts
Description: The clip shows what a wrong downshift in a manual car does inside the engine. The rev limiter only cuts the engine's own power, but with the clutch out the wheels drive the engine instead, faster than it can take. The valve springs can't keep up, the valves can't close in time, and they can hit the pistons.
The surprising number: in two makers' manual tables, 2nd gear hits the red zone at about 50 mph (about 80 km/h). Go faster than that and the tachometer needle enters the red area. The exact figure varies by car and engine, so check your own owner's manual.
Good to know: automatics and dual-clutch boxes usually refuse such a downshift. Some limiters cut spark instead of fuel, and the result is the same: the engine stops pushing, but the wheels still drive it. Skipping a gear at a sensible speed is fine; the manuals only ask you not to exceed the lower gear's maximum speed. How much damage you get depends on how far and how long the engine is over-revved. The picture is ILLUSTRATIVE: slow motion, the gap is exaggerated and the layout is simplified.
Next: why running on empty can cook your fuel pump
Sources:
https://www.manualslib.com/manual/803212/Honda-Crv-2007.html?page=361
https://www.manualsdir.com/manuals/746538/subaru-2010-forester.html?page=243
https://en.wikipedia.org/wiki/Rev_limiter
https://www.slashgear.com/1933462/car-damaging-money-shift-explained/
https://www.carscoops.com/2022/07/what-actually-happens-when-you-money-shift-with-a-manual-transmission/
https://performancedevelopments.com/what-an-over-rev-really-is/
#ManualTransmission #Downshift #MoneyShift #RevLimiter #CarTips #CarFacts #EngineDamage #HowCarsWork #Cutaway #Shorts
How it's made: Blender cutaway, synthesized + recorded engine sound, AI narration. Close description
The surprising number: in two makers' manual tables, 2nd gear hits the red zone at about 50 mph (about 80 km/h). Go faster than that and the tachometer needle enters the red area. The exact figure varies by car and engine, so check your own owner's manual.
Good to know: automatics and dual-clutch boxes usually refuse such a downshift. Some limiters cut spark instead of fuel, and the result is the same: the engine stops pushing, but the wheels still drive it. Skipping a gear at a sensible speed is fine; the manuals only ask you not to exceed the lower gear's maximum speed. How much damage you get depends on how far and how long the engine is over-revved. The picture is ILLUSTRATIVE: slow motion, the gap is exaggerated and the layout is simplified.
Next: why running on empty can cook your fuel pump
Sources:
https://www.manualslib.com/manual/803212/Honda-Crv-2007.html?page=361
https://www.manualsdir.com/manuals/746538/subaru-2010-forester.html?page=243
https://en.wikipedia.org/wiki/Rev_limiter
https://www.slashgear.com/1933462/car-damaging-money-shift-explained/
https://www.carscoops.com/2022/07/what-actually-happens-when-you-money-shift-with-a-manual-transmission/
https://performancedevelopments.com/what-an-over-rev-really-is/
#ManualTransmission #Downshift #MoneyShift #RevLimiter #CarTips #CarFacts #EngineDamage #HowCarsWork #Cutaway #Shorts
How it's made: Blender cutaway, synthesized + recorded engine sound, AI narration. Close description