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.
I believe the Ford Escort 1.9L engine is non-interference.
It's a non-interference engine meaning if the timing belt breaks, there is no engine damage.
Non-Interference
what effect freewheeling diod
A non-freewheeling engine is an engine design that does not allow the crankshaft to rotate independently of the camshaft when the engine is not running, typically due to a direct connection between the two. This design can be found in certain types of engines, such as those used in some motorcycles and performance vehicles, where it helps maintain engine braking and control during deceleration. In contrast, freewheeling engines allow the crankshaft to spin freely relative to the camshaft, which can lead to different performance characteristics and behavior when coasting.
As I understand it, a freewheeling engine, such as the 2.3 liter Ford is an overhead cam engine that will not crash the valves if the timing belt breaks. A 350 Chevy uses a timing chain since the cam is in the block. If the timing chain breaks on that, you're out of luck.
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.
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.
100.000 k/m 60 000 miles
8 valve engine is freewheeling. very little chance of engine damage. 16 valve is an interference engine. Most likely damage will have occured.
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.
No, there will not be engine noise, but you may notice a decrease in engine performance. The 1.9 liter engine is a freewheeling engine which is not damaged by incorrect camshaft timing or even by a broken timing belt.