Hi - Thankks for the post. Two weeks after I did my vales on 28 000 km, it seemd that one cylinder went dead for about 3 seconds, two days later it went the same. I am concerened that I may have dammaged something or did somethiing wrong. Any advice?
Check cylinder compression.
You need to find out what is correct compression for your type of NC's engine for South Africa. It depends on the cylinder compression ratio (performance and type of fuel).