Most likely the keyway slot will be the zero mark. more times than not, position will be straight up. Refer to a manual
The sprocket on the nose of the crankshaft that drives the cam sprocket.
If the crank has 48 and the sprocket 12 then 48/12=4. The wheel will turn 4 times for each turn of the crank.
Chain is on the smallest sprocket on the crank and on the largest sprocket on the rear wheel
i would assume you have cranks with a built in sprocket, if this is the case, you can't
20 rpm
Look closly at the sprocket and you will see a small dot or indentation,you align both dots (cam and crank sprocket dots)
160 foot pounds
If it is a V8 set the motor at top dead center #1 cylinder a the very top and the cam mark should line up with the middle mark on the crank sprocket or o degrees advanced. it doesnt have a belt, it has a chain. there should be one or two lil dots on the chain and like a very small like on the sprocket, make the dots on the chain line up exact with the sprocket and your good There is one mark (dot) on your came sprocket and one mark (dot) on your crank sprocket right about your crank "key" slot. Align those two marks (cam sprocket mark down, crank sprocket mark up). Now turn your crank 2 complete revolutions and verify that those two marks are in the same location that you originally set them. Obviously you will have to have the chain on. I just installed my millionth and one yesterday.
Generally, for most single cam engines, there is a dot or mark on the cam sprocket and a similar mark on the crank sprocket. Point them at each other. the timing marks on the crank and cam sprockets must be lined up with marks on the timing chain in an overhead cam engine
bottom crank sprocket dot to oil pan idle sprocket dot up both cams set v8 to top
Timing belt crank sprocket
Dodge Dakota V6's didn't have a crank sensor until 1992.