So i've got a question bout my z6 i've searched and was just wondering what you guys thought. So anyways ive been building my z6 for quite some time now probably bout 2 years(vitara build), but i finally get it running and its running good for 2 days, then on the 3rd I go to start it for work and it sounds like it has no compression in a cylinder, but it does fire, it's just running rough. I get to work and do a compression test and cyl. 1 and 4 are 0 psi. 2 and 3 have 140psi (vitara pistons), I do a leakdown test and my intake valves on cyl. 1 are leaking like there stuck down alittle bit. and cyl. 4 intake and exhaust valves are leaking.

Now my question for you guys is do you think the valves and guides are just sticking form lack of lube and the heat cycles made them worse(I bought the head rebuilt two years ago, but it sat in just an engine bag, now is out of warrenty)? Or do you guys think it could be weak springs (from being held down just a little the whole time, i did have the lash adjusters all the way backed off but I never paid attention to see if there was still a little tension on some of the valves)FML. I just want to see if you guys think i could/should just pressureize the cylinders and swap in a full set of supertech springs or pull the head and have the whole head checked, i just dont want to buy another cometic headgasket, or pull the head again if i dont have to(this would be the third one/time) im just really losing hope on this build and have a **** load of money into it.

Oh and BTW while i have the two cyl. pressured up I can slightly tap on the rocker arms of cyl. 1 and 4 with a hammer and it seals back up, but once you turn it over same thing they get stuck down alittle bit.
Any helpful advise would be very appreciated, thanks in advance mike, BTW sorry bout the novel just wanted to make sure I had all the info someone would need. thanks again