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Q: 2000 Nav with 112,000 mi...runs great....just returned from 600mi trip. on 2000 Lincoln Navigator

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
pulled into driveway unusual noises or performance....tried to start again 5 min later and eng would not crank....engaged ignition and barely cranks...tries to but it's like a 1/4 turn...making an ugly almost metal against metal scraping sound for just an instant...first thought was battery not able to crank engine...battery checked out fine...then thought prob starter....replaced starter...still same prob....I'm wonder maybe timing belt issues but no symptoms leading up to failure if that's what it is...very strange....any thoughts would be greatly appreciated........Dave
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Are the engine's coolant and engine oil level OK. Perhaps remove the spark plugs and try rotating the engine using a socket on the crankshaft pulley. Rotate the engine slowly and make sure it turns freely. Your engine uses a timing chain not a timing belt and chains are less likely to slip or break especially at such low mileage. Check battery ground and power cables and engine block to chassis to ensure it is well grounded. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate
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