So i went driving today and as always no problems, but after about 40 miles cruising and some "getting away at green light as fast as possible" moments that i pushed the pedal a bit deeper the engine suddenly got a ticking noise (I did NOT revved it to high, limiter is set at 6000 and did not kicked in) But engine performed good and was running on 8 cilinders.

So i cruised to my shop and diagnosed the noise was from under the valvecover on the 2-4-6-8 bank, removed the cover and the cilinder #2 intake rocker was loose, removed the rockers and pushrods and al looked good, put everything back and adjusted #2 rocker to zero lash and ½ turn preload.

Started up and perfect, no ticking anymore so i went driving, after about 10 miles i could feel that it was running on 7 cilinders but no ticking, so i went back and removed the intake, what i found was that #2 intake lifter was easy to push to the bottom and the other lifters were rock hard.

So i'm gonna replace the lifter and test again, what could be the cause of this and what is wrong / broken in this lifter??

In a few weeks i'm going to the track and then i don't wanna have this problem, what can i do so that this does not happen again?

Thanks for your time!

Look closely at that cam lobe I hope it is okay You can take that lifter apart and fill it with oil and reassmeble it to make it work Look very closely at the little flapper valve in the top where the pushrod cup rides

So i took it apart and got a lifter with a hole in the bottom......But what is funny is that the cam lobe looked perfect, after measuring the lobe against the others it is wore down but only 0.65mm (0.025") can't see that there is something wrong!

So now the engine is allready out for cleaning and inspecting, everything looks very nice and almost no metal in it, luckely i teared it down quick i think.

will update soon when i measured and cleaned everything.