Hello, I drive a Ford Scorpio with DOHC engine 2.0i with 120 hp. In July I had replaced the cylinder head gasket and the cup plunger. Now a valve flaps on warm / hot engine. Could it be that a cup plunger is faulty or it has formed a contamination, a “thrombosis” in the course of the repair, which affects the hydraulic valve compensation? (steam bubbles, heat bubbles, air, etc. in the return valve of the plunger) If I have 5 new cups of plunger v On the back with a wooden handle firmly press on the regulator valve, comes some oil out of the bumps, which means that the small ball inside does not close clean. Now I want to install some better, expensive shocks from AJUSA. Maybe then is quiet.