Hello guys,
Many thanks for all of your replies!
I have drawn a conclusion that is I need to replace the valve stams seals. After I tried many different things to fix it, the mechanical fix is the only way I can really fix the problem.
I have ordered the parts from my local dealership for £187 (Head Gasket Set), they will deliver the parts on Friday. If I get it from USA, it costs £160 but takes 10-day delivery.
I got the “explore view” of the engine head, and the valve replacement tool, and my good old friend whom has been working for Ford for 30 years comes to help, he is doing this kind of work day in day out all the time.
Fingers crossed, Hope everything goes OK this weekend.
I will keep your guys up to date later….
Felix
P.S. this there anything your guys want to tell me to watch out???