How to change time chain on a 3.3 v6 dodge caravan, easy way to look at timeing chain, so i can tell if it is bad

This design has no tensioner. Check the sprockets for wear on the tips--especially the crank sprocket. With the cover off, turn the crankshaft with a socket and see how close the chain comes to slipping backward on the sprocket. There are complete replacement procedures at AutoZone.com, which I will try to paste in below.

3.3L and 3.8L Engines

See Figure 18



Fig. Fig. 18: Timing mark alignment-3.3L and 3.8L engines

1. If possible, position the engine so that the No. 1 piston is at TDC on the compression stroke. Disconnect the negative battery cable. Drain the coolant.
2. Remove the timing chain case cover. For more information, refer to the Front Timing Cover and Seal procedure, earlier in this section.
3. Remove the camshaft gear attaching cup washer and remove the timing chain with both gears attached. Remove the timing chain snubber.

1. Assemble the timing chain and gears.
2. Turn the crankshaft and camshaft to line up with the key way locations of the gears.
3. Slide both gears over their respective shafts and use a straight edge to confirm alignment.
4. Install the cup washer and camshaft bolt. Tighten the bolt to 35 ft. lbs. (47 Nm).
5. Check camshaft end-play. The specification with a new plate is 0.002-0.006 in. (0.051-0.052mm) and 0.002-0.010 in. (0.51-0.254mm) with a used plate. Replace the thrust plate if not within specifications.
6. Install the timing chain snubber.
7. Thoroughly clean and dry the gasket mating surfaces.
8. Install new O-rings to the block.
9. Remove the crankshaft oil seal from the cover. The seal must be removed from the cover when installing to ensure proper oil pump engagement.
10. Using a new gasket, install the chain case cover to the engine.
11. Make certain that the oil pump is engaged onto the crankshaft before proceeding, or severe engine damage will result. Install the attaching bolts and tighten to 20 ft. lbs. (27 Nm).
12. Use tool C-4992, or equivalent, to install the crankshaft oil seal. Install the crankshaft pulley using a 5.9 in. suitable bolt and thrust bearing and washer plate L-4524, or equivalent. Make sure the pulley bottoms out on the crankshaft seal diameter. Install the bolt and tighten to 40 ft. lbs. (54 Nm).
13. Install all other parts removed during the chain case cover removal procedure and fill the engine with oil.
14. Connect the negative battery cable, road test the vehicle and check for leaks.