Hi all, I'm looking for some advice on the noise my engine is creating, I did a service before a track day then after the track day on my way home the engine started tapping/ticking. I got told it was the hydraulic lifters (tappets) so I went ahead and replaced them with new 3mm ones, with new hks filter and fully synthetic oil I started the engine got it upto temp then held the revs for the oil pressure to build up, but the noise is still there. I then got told it was a manifold gasket so off I went again got myself a japspeed tubular manifold with new gaskets and fitted that and removed the sas pipe, started her up and still this noise persists, now maybe I've been impatient and haven't give the lifters enough time to settle or have crappy gaskets on the manifold but I'm getting frustrated and just want it sorting as I'm dying to drive my evo, Any help and advice is much appreciated. Thanks for reading guys. Ps it's an evo 4 with 5 engine and 7 turbo.