Joined: Sep 2009
Is this a valve problem 4.6DOHC
Renovated my Mustang and have fitted a commemorated signature crated 1998 4.6 DOHC Cobra Jet which had been stored for many years still in the original crate.
Have had many problems but thought that they had been all soughted.
Have run the car for 400miles only and it has developed a rumble noise if you rev over 3000rev.
I cant believe this is a bottom end problem because I have been gently running in the engine as it was new.
I have read that not all the valves open below 3000 rev .
As the noise only appears over 3000 I wondered if the noise was valve related.
I am new to this engine can anybody with knowledge of this type help with any advise or help.
Regards Keith Fowler (over the pond in UK)