Modern engines with EFI don't have timing marks on the harmonic balancer. Timing is controlled by the ECU and not adjustable. On older cars, yes, we need what engine
The year, make, model and engine info would help.
To check the timing, the tan/black stripe wire to the distributor needs to be unplugged. Use # 5 plug wire with the lower timing mark. The factory timing should be labeled on the air cleaner. It is probably 4 degBTDC but 6 to 8 degBTDC should make it run cooler and give it better gas mileage.
make sure the camshaft sprocket timing mark is aligned with the upper back cover and cranksaft sprocket timing marks align the crank mark with the cast-in mark on the front seal retainer.
the timing mark is on the pullie itself its a small notch .... to get to your timing belt you have to remove the belts, motor mount, and the pullies, then remove the plastic cover then you can access your timing belt .... it looks worse than it really it
look at how to set timing mark for 99 daewoo,explained it there
After disassembling to expose timing belt, look for TDC and ATDC timing marks. Align them, allowing 43 centimeters. Set BTDC mark in like manner.
If you look at the harmonic balance you will see on the front of it a medium size circle. That will be your timing mark.
this question is best served in the automotive section
2.4l dohc balance shaft timing mark, crankshaft sprocket timing mark,oil pump timing mark and camshaft TWO timing marks 2.4l sohc balance shft timing mark, crankshaft timing mark, oil pump timing mark and ONE camshaft timing mark. it is complicated only that everymark must be bang on, if not the pistons will hit the valves and YOU get to rebuild engine.
If you look stright down between the water pump and engine block you will see the timing mark.
there will be a timing mark on the harmonic balancer. and a timing tab on the timing chain cover. point your timing light at the timing tab and you should see the timing mark on balancer. if not timing is way out.markstang.
It is look like ruler with 0, 10, 20 number XXXXXXXXXXXXXXXXXXXXXXXXXXXXX The timing scale will have an "A" at the top and a "B" on the bottom. In the center is a "0". The "A" is for after top dead center. The "B" is for before top dead center. Each mark on the scale is 2 degrees. Timing is always set on before top dead center.
a hash mark looks like this...#