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What is a freewheeling engine?

Updated: 4/28/2022
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13y ago

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In a freewheeling engine, the piston tops and the valve bottoms do not share the same mechanical space, even if the timing belt or chain breaks.

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Q: What is a freewheeling engine?
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Is a Ford Escort 1.9 engine freewheeling?

I believe the Ford Escort 1.9L engine is non-interference.


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Is Chevy's 350 cubic inch engine freewheeling?

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Is the engine a free wheeling engine?

Yes, the Mercury Villager and Nissan Quest engine, 3.0L and 3.3L, are all freewheeling engines at the insistance of Ford to enter into the joint venture program. The Maxima and Pathfinder with the same engine remained non- freewheeling (interference engines). I work for Ford and worked on the Villager program from 1989 to 2002 and was personally involved in the development of this program.


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Is freewheeling bad for your car?

In no way is it detrimental to a car, whereas overrun (when the wheels are driving the gearbox and engine) causes unnecessary wear on the transmission. Freewheeling will increase brake wear, but brakes are much easier and cheaper to replace than gearboxes and differentials. Any vehicle that has to rely on engine braking, has an inadequate braking system.


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You can save fuel because the engine then goes back to idle. But by disconnecting the engine from the wheels (freewheeling) you don't have so much control over your car. You can also save fuel by turning off the engine and freewheeling down a hill, but if you have power brakes they won't have any power. Could be a problem.


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What is the definition of freewheeling?

Freewheeling refers to a person riding a bicycle without peddling such as down a hill. The word has been popularized to include personality traits indicating that a person is carefree.