How to set cam timing

Engine data : ISUZU C240PKG. GENERAL DATA. MODEL. C240. MAKE. ISUZU. FUEL TYPE. 4 / DIESEL ... VALVE CLEARANCE - INTAKE COLD mm. 0,45

https://www.google.com/search?q=98+isuzu+c240+diesel+engine+valve+clearance

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A sure sign that it's time for a valve lash adjustment is if your engine is making a loud clicking or tapping noise when starting up or if you experience a loss in engine power. You can find more details on the suggested adjustment frequency here.
https://www.allstatepeterbilt.com/blog/valve-adjustments-explained

How To Check Tappet Clearance

1. Taking all safety precautions.
2. Make sure the piston is on TDC. ...
3. Make sure the engine has cooled down.
4. Loosen the lock nut of the rocker arm.
5. Now adjust the tappet clearance between the rocker arm & valve stem by tightening or loosing the nut below the lock nut.

https://www.marinesite.info/2012/02/1why-tappet-clearances-is-given-and-how.html

To adjust the valve clearances, use a spanner or a socket wrench on the crankshaft-pulley bolt. Turn the engine in its normal direction of rotation until No. 1 piston is at the top dead centre ( TDC ) of the compression stroke .
https://www.howacarworks.com/engine/checking-and-adjusting-valves

you can get guide from many sites.. i know few
error codes/ fault codes, wiring diagrams, schematic diagrams, torque specs, engine info, switches functioning, assemble, disassembly, complete refurbish, repair, installation every single thing is covered
within seconds u can get the access and it's totally illustrative complete

the 6sa1 pump is an inline pump suitable for a turbo charged isuzu engine
the 6ad1 pump is a common rail diesel pump and will not fit the engine as the 6sd1 pump is a pump that just supplies 25,000psi to a common rail into which electronic controlled injectors are fitted
e-bay has a listing for a new 6sa1 pump for $1976.00 ud + $171.38 shipping
search-- 6sa1 and again for 6sd1 diesel pumps and the photos will show the difference

Should have the info here

https://barringtondieselclub.co.za/isuzu/4h.html

Cam timing not correct on that bank. Veryify cam timing. Not sure if the engine is a "zero clearance" engine but, if so, the cam timing error may have bent some valves! Oh nooooo!

the valve clearance is intake .006 exhust .010 they must be set with engine cold passenger side is the intake driver side is the exhust send me your e-mail and i will send you the procedure.

Valve Clearance Valve clearance is there to allow the valves to cool in between combustion events (spark), and to make sure the valve closes properly and contains the combustion explosion. You need to cool the valves a little bit, the exhaust valve moreso than the inlet, as it's what sees the most heat as spent burnt gases go past it into the exhaust port. Run too little clearance and you'll cause the valve to "weld" a little bit to its' seat every time it closes, and then take seat metal off again when it opens. Do this enough times and you burn out the valve seat and need the head reconditioned. However, by running less clearance, the valve stays open for that little but longer, and you get more air in and out of the motor, and make more power. Run too much clearance and your motor just sounds like a diesel and loses power and tappet rattle annoys you while you're driving, so it's better to err on the side of caution.
The stock valve clearance (0.008" inlet / 0.012" exhaust, warm) is pretty good for any of the cams I've listed above, they're well-sized street cams, not really wild top heavy race cams that require super high compression to work, so don't be afraid to close the valves up a bit from the suggestions of the cam grinder, which will usually say between 0.010" and 0.014". There are a few ways to set your valve clearances:
Yellow Book Method This is from the factory 3K/4K/5K engine manual, aka The Yellow Books. It's the quick and lazy method.
Set engine to #1 TDC. Crank pulley timing mark should be on 0, distributor rotor should be pointing towards spark plug 1 or 2. Set tappets (counting from the front) 1, 2, 3 and 5. Rotate engine 360 degrees, crank pulley to 0 again, distributor rotor turned 180 degrees. Set tappets 4, 6, 7 and 8.
Nine Method I've never really gotten into doing this, takes too much time and maths for my liking :P Rotate the engine through its' range of movement, as one valve is "on the rock" of its' max lift, subtract the valve number from 9 and that's the tappet you should be setting. For example, if #8 valve is open, set clearance on valve #1. If valve #7 is open, set clearance on #2. And so on.
Stewart uses this method, and rotates the camshaft through its entire base circle and sets the clearance at the highest point. Which is a pretty good idea, as it compensates for the possibility that the base circle has been ground unevenly, and allows you to run the proper valve clearance that you want to run, instead of something that may be a few thou larger in reality.

This is the specs for the 4H Diesel engine:
Intake valves clearance cold 0.4mm(.016inches)
Exhaust valve clearance cold 0.4mm(.016inches)

Main bearings - stage 1-80 Nm; stage 2-100Nm.Big ends-stage 1-22Nm,stage 2 -45Nm.Flywheel/drive plate-55Nm.Crankshaft puley-120Nm.Cil.head as main bearings.Valve clearance - cold - inlet-0.15 , exhaust - 0.25. Timing 6/800 at sea level.Good luck!