What timing mark should it be set on for this.

To set the timing on your 1991 Nissan truck, follow these steps:

1. Locate the timing marks on the engine. They are usually located on the front of the engine, near the crankshaft pulley.
2. Remove the timing cover if necessary to access the timing marks.
3. Check the engine's specifications to determine the correct timing setting. This information can be found in the owner's manual or a repair manual.
4. Connect a timing light to the battery and to the number one spark plug wire. The timing light will allow you to see the timing marks more easily.
5. Start the engine and let it warm up to operating temperature.
6. Aim the timing light at the timing marks on the engine and observe the marks as the engine runs.
7. Use a wrench to loosen the distributor bolt slightly.
8. Rotate the distributor slightly to adjust the timing until the marks line up with the specified setting.
9. Tighten the distributor bolt once the timing is set.
10. Recheck the timing to ensure it is still set correctly.
11. Turn off the engine and disconnect the timing light.
12. Reinstall the timing cover if it was removed.

If you are not comfortable performing this procedure, it's best to take your truck to a qualified mechanic for timing adjustment.

You would be safer finding the timing marks at the belt end. The marks will be there but sometimes they are just a pain in the tailbone to find. The engine hits TDC twice in a cycle on each cylinder. You need to be on the correct one to set timing. These are not always marked on a fly wheel.

I think the M130 engine uses a timing chain. To get you timing marks set up correctly you mignt have to take the top rocker cover off to see the Cam timing marks. The Crank should be set up to the centre 'OT' mark for Top Dead Centre, (TDC). there is a set of numbered marks either side of it. The pulley is marked for both Top Dead Centre and Bottom Dead Centre, (BDC). Being a Mercedes the marks are in German. OT for TDC and UT for BDC.

Timing marks setting Corolla 4A-FE.
Align the notch on the crankshaft pulley with the "0" mark on the timing belt lower cover.


With the crankshaft pulley being aligned with the 0 mark on the timing belt cover, the hole on the camshaft sprocket should exactly be in front of the notch of camshaft bracket.



Hope that works.

set mark on crankshaft to TDC mark on timing cover. set mark on cam pulley to align with mark on head .if more than one mark on pulley rotate by hand till exhaust and inlet just rocking then align closest marks .

see internet.

1983 LINCOLN MARK VI Timing Set - RockAuto

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1983 LINCOLN MARK VI 5.0L 302 cubic inch V8 : Engine : Timing Set, Price, Add ...Timing Set - 3 Pc.

its not just the camshaft timing marks you set up, you also have to have the crankshaft timing mark set right to or you may damage your engine
check the internet for the right timing procedure for you model car ok

set the timing mark on the crankshaft to the mark on the oil pump, then set the timing mark on the camshaft to the mark on the alternator bracket/set second camshaft mark to mark on the inner timing belt cover. line up all mark as decribed. be sure before u set anything to bring #1 piston all the way up to top. with belt on turn crankshaft 2 full turns to bring #1 piston back to top if the cams are not lined up correctly loosen belt and start over again until everything lines up correctly. you may have to do this a few times but it will work.

Installation
Ensure timing marks aligned [6] & [7] . 1. Fit timing belt in anti-clockwise direction, starting at crankshaft sprocket. Ensure belt is taut between sprockets. 2. Slacken tensioner pulley bolt [8] . Push tensioner pulley firmly against timing belt to tension belt. 3. Tighten tensioner pulley bolt [8] . Tightening torque: 43-55 Nm. 4. Except Matrix: Turn crankshaft one turn clockwise. 5. Matrix: Turn crankshaft two turns clockwise. 6. Ensure timing marks aligned [6] . 7. Apply a load of 2 kg to belt at . Belt should deflect 4-6 mm. If not: Adjust position of tensioner pulley. 8. Install components in reverse order of removal. 9. Tighten crankshaft pulley bolt [2] . Tightening torque: 170-180 Nm

7 is timing mark on cam,pin mark to top,hole in spoke below pin mark lines up with mark on head
6 is crank timing mark,pin mark on crank lines up with mark on block
NOTE this mark is just before top

The mechanic should check on the timing mark . sir you have to look at the timing mark to set the timing chain .there is a timing mark in the pulley where you will place the timing chain.and then there also is a timing mark in the place where you place the pulley set it both align with each other then after it then place the belt.then it is set.