Try taking out the spark plugs first, because turning the crank shaft with the plugs in creates pressure. Or it could be that there is a bent rod and the piston head is in the head wall.
for the purpose of starting the car, it is not possible by hand, but if you just want to turn the crankshaft, use a socket on the crank sprocket bolt
First, verify the spark plugs are sparking by removing one, grounding it to the engine and verify plug is firing when someone else turns the car over. If you have fire, then check crankshaft position sensor, camshaft position sensor and then fuel filter and fuel pressure.
Key won't turn or it does and the engine won't turn over?
teeth on fly wheel may be rounded or teeth on stearter drive are rounded.
Check the timing in the caravan. It sounds like the timing has jumped, and the engine could backfire then not start, and could not even turn over.
if your talking about when your cranking the engine over with the cap off, then you have a broken distributor gear or shaft or bad camshaft gear.
Turn engine with a socket on the front crankshaft pulley.Turn engine with a socket on the front crankshaft pulley.
bad bearing
put the car in drive and crankshaft wont turn anymore. then you can take off the bolt
Check your battery
I do not have a answer for it, do you an answer for this problem?
Check the 1996 Windstar's starter first. If the starter is working but it cant turn the motor, take a ratchet and turn the crankshaft by the front bolt. If the crank wont turn over then something inside of the engine has seized up.
If this is a Power Stroke engine, the most likely cause is a faulty crankshaft position sensor.
Check the crankshaft sensor. If the sensor on the Grand Voyager is bad then there wont be any spark.
it wont have valves in the head. If you remove the exhaust pipe from the head and turn over the engine by hand, there will only be a piston and no valves moving.
Causes include failing fuel pump or engine cam/crankshaft sensors.
1st ? is , is it the correct starter for that vehicle?2nd is the battery up to par for starting ?
you only tighten it hand tight. but make sure you turn till it wont turn no more, just hand tight.