whats wrong with my jaguar ? on 2000 Jaguar S-Type

When I drive it it makes a ticking noise it has power i had the rocker arms replaced the noise didnt go away now i am going into the motor to get a vavle job would this solve the promblem ?

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1 answer
it is possible. rec. fuel system clean. ethanol treatment to 1 tank premium. ethanol blend in fuel causes build up in fuel system, combustion chambers, exhaust system and causes increased wear to spark plugs. internal build can cause ticking from engine. result may take drive time.