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Rotate the engine so that No. 1 cylinder is at TDC on the
compression stroke. Check that the timing marks are aligned on the
camshaft and crankshaft pulleys. An access plug is provided in the cam
belt cover so that the camshaft timing can be checked without removal of
the cover or any other parts. Set the crankshaft to TDC by aligning the
timing mark on the crank pulley with the TDC mark on the belt cover.
Look through the access hole in the belt cover to make sure that the
timing mark on the cam drive sprocket is lined up with the pointer on
the inner belt cover.
ahh the two liter iron duke i had that same truck once great engine although they have a bad reputation for timing issues the timing belt is located behind the harmonic balancer/crankshaft pulley once the fan and crank pulley are removed you should have complete access to the timing cover. open it and its as simple as lining up the confusing timing marks on the crank and cam when you put the belt on and apply tension with the belt tensioner pulley.hope this helps
What are trying to do, change the belt or just set the timing? The timing marks should be on the left side (drivers side) near the front pulley. There is a notch or line on the pulley and the scale is on the timing cover. If you are trying to change the timing belt, you have to remove the fan and water pump pulley, then crank pulley and the timing cover. If you are changing the belt, here's a helpfull hint loosen the tensioner bolts, one 13mm one 17mm, then pull or push on the belt to force the ternsioner back as far as you can and tighten the 13mm bolt. Now you can take the old belt off and put the new belt on with ease. You have to set the crank at zero, I think the key in the crankshaft is straight up at this point, there is a diamond shaped mark on one of the teeth of the pulley, that lug has to line up with the notch in plastic behind the pulley. At this point you want the arrow on the cam pulley to point to the mark on the inner cover (about 6 o'clock) and the rotor in the distributor should point to the "V" notch in the pick up coil assembly (about 6 o'clock). Good luck!
You do not have to remove the harmonic balancer pulley (crackshaft hub) to change your timing belt.
Find your belt tensioner. It will look like this: http://www.bizrate.com/automotive-parts/oid1040178522.html You put a socket on the head of the bolt that is holding the pulley on the tensioner, and pull it to the left. That will pull the pulley away from the belt so you can remove the belt. The tensioner is under spring tension, so when you release, it will snap back.
You might consider investing in a repair manual available at most auto parts stores for under $20.
The bolt is a normal, right hand thread, and it is tough to keep the engine from turning while you brake it loose. There are several methods, but I have used a chain wrench on the hub, and I protect the hub with an old section of belt,
You do not have to remove the actual sprocket to install the timing belt only the balancer/lower pulley. Just push the tensioner all the way to the pass. side and install your belt, and release the tensioner.