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Old 11-27-2019, 10:32 PM   #2
fdryer
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Join Date: Jan 2006
Location: NYC
Posts: 43,634
 

2003 L-Series 3.0L Sedan
Default Re: 2003 Vue AWD V6 Timing belt

Presuming a 3.0L V6 engine and no easy way to see the timing belt except removing serpentine belt, belt tensioner, power steering and water pump pulley, and the passenger side engine mount before the timing cover can be removed for timing belt inspection, There may be one alternative to checking for a broken belt; manually rotating the crankshaft pulley by hand.

Manually rotating the crankshaft by hand will provide 100% feedback. Under most conditions, mechanical timing usually leaves spark plugs off to prevent compression pressures against hand turning an engine. Zero resistance as the engine is rotated. With our 3.0L V6 engine and several upper engine parts to remove before spark plugs can be removed, careful attention to compression resistance should be the only resistance to engine rotation. If the timing belt is damaged, mechanical timing will be incorrect and at least one piston will meet one valve resulting in the engine jammed without any further rotation possible. When manually rotating the engine thru the crankshaft pulley, if spark plugs are removed to allow easier rotation without compression in the way, either the engine will rotate 720 degrees freely or not. Intact timing belt will allow unlimited crankshaft rotations. A damaged or broken timing belt will stop as soons as one piston meets a valve in untimed mode.

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