I am looking for cylinder head & main + big end torque specifications for Isuzu 4JJ1 engine

https://www.google.com/search?q=2012+chevrolet+captiva+2.2+VCDi+diesel+cylinder+head+torque+specs

https://www.google.com/search?q=2012+chevrolet+captiva+2.2+VCDi+diesel+big+end+torque+specs

Not too much information on the 2.2 diesel. A service manual is the best idea.

..

Here are the torque settings for a Ford Fiesta 1.4 2010 for the main bearings, head bolts, and big ends:
Main bearings

• Main bearing caps: 1st stage - 7 Nm, 2nd stage - 16 Nm
• Main bearing bolts: 45 Nm + 90°

Head bolts

• Cylinders 1-3: 2nd stage - 30 Nm + 90°, 3rd stage - 80 Nm + 180°
• Cylinder 4: 2nd stage - 25 Nm + 90°, 3rd stage - 60 Nm + 180°

Big ends

• Connecting rod cap nuts: 1st stage - 22 Nm, 2nd stage - 40 Nm + 90°

Please note that these are just the general torque settings. The exact torque settings may vary depending on the specific engine and vehicle. It is always best to consult your vehicle's service manual for the correct torque settings.
Here are some additional tips for tightening the torque settings:

• Use a torque wrench to ensure that the bolts are tightened to the correct torque.
• Tighten the bolts in a star pattern, working your way from the center out.
• Do not overtighten the bolts, as this can damage the engine.

https://idoc.pub/download/isuzu-d-max-2011-4jj1-engine-service-manualpdf-6ngedxymv6lv

(the PCV valve is placed at the cylinder head cover)

https://www.pelicanparts.com/BMW/techarticles/BMW-3-Series-E46/104-ENGINE-Cylinder_Head_Bolt_Testing/104-ENGINE-Cylinder_Head_Bolt_Testing.htm

https://www.autozone.com/repairguides/BMW-X5-2000-05/Specifications/Torque-Specifications/_/P-0900c152801b2c86

https://www.google.com/search?q=diesel+engine+cylinder+head+torque+specifications&sa=X&hl=en&tbm=isch&source=iu&ictx=1&fir=kNVtXRlyYkOHuM%253A%252CYZYLPI-DBrnikM%252C_&vet=1&usg=AI4_-kTXWYiqvd-JLz4dq5hvokBF4q1Ymg&ved=2ahUKEwijgKWCuLHpAhVxlFwKHQ6QCPAQ9QEwAHoECAkQHQ#imgrc=kNVtXRlyYkOHuM:

Follow this link it should be whay your looking for
https://www.autozone.com/repairguides/Subaru-Car-1998-05/Specifications/Torque-Specifications/_/P-0996b43f8037a924

Check here

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

www.isuzupup.com > ... > Diesel - Troubleshooting and Maintenanc

go on line and type in torque specifications for isuzu 4b1a engine
there may be a pdf version that you can down load

http://www.clubisuzu.com/viewforum.php?f=23

timing marks