engine timing chain
now if you want to check the timing chain inside the timing cover
Turn over the engine in the direction of normal rotation (usually clockwise (looking from the front of the engine) till the crank pulley timing mark is on TDC (on compression stroke with #1 cylinder) with the indicator on the block. The #1 cylinder rocker arms on the valves will be rocking freely with the exhaust valve and intake valve closed. Once you have this set:
- remove the timing gear cover
- check the timing chain in relation to the gears, there should be markings on the gears and there will be different colored links in the timing chain, these should align up with the marks on the camshaft and fuel injection pump gears. The crankshaft gear has a white mark. All these should be aligned when the engine is on TDC on #1 piston compression stroke.

pay attention to the fuel injection pump gear markings and make sure they are aligned, if they are not then you can at this point correct the problem.

Note: keep in mind you may have to turn the engine over many times coming up on the compression stroke to get all the gear timing marks to line up with the marks on the chain exactly.
Now if you cannot get the injection pump marks to line up when the crank and cam marks are lined up then this will tell you the injector pump was not installed correctly. At this point you can remove the pump, set the pump at the correct position, install the pump gear at it's correct position and reinstall it with the marks lined up.