Opel astra estate 160i cylinder head bolts torque

Question edited for clarity and correct order.

https://www.google.com/search?q=1996+Opel+Astra+Estate+1600i.+Torque+settings+on+mains+and+big+ends

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Using new bolts the sequence is :-
stage 1. 25Nm (18lbf ft)
stage 2. Angle tighten 90 degrees
stage3. Angle tighten another 90 degrees
stage4. Angled tighten another 90 degrees
stage5. Angle tighten a further 45 degrees
these as same for 1.4. 1.6 and 1.8 engines but not 2.0

It's running to rich and overheating the converter.

It could be anything from a bad spark plug wire, bad coil, bad valve, bad fuel injector, vacuum leak, or other electrical or mechanical issue. Have you done anything to attempt to fix the issue such as performing a tune up, checking the compression on the misfiring cylinder, or swapping spark plugs or spark plug wires between cylinders to see what the misfire follows?

Fuel filter.

Hi I need the torque sequence for my 2002 opel astra classic 1.6 16v cde plz if enyone can help
and also the main and big end torque settings plz in nm

30nm +60deg+60deg+60deg.

I cannot find a EL20B in my data,but all Astra listed had the same head sequence as shown:

10 6 2 3 7

9 5 1 4 8

the torque specs for the C20XE,C20NE,X20XEV were all
25nm(18lb/ft),-then 90 deg,-90deg,-90deg.
Z20LET were as above plus an additional 15deg.
Same data for smaller and larger engines(except a couple that were 45deg instead of 15)
Make sure that you replace the head bolts with new,they are torque to yield bolts that are designed to stretch to 'plastic' state,and should not be reused.
Put grease(graphite if you have it) under bolt heads and washers,oil the threads.
Usually the head sets come with the torque specs.
I hope this helps you.