So my friend bought a 91 EF hatch with a Ls/vtec swap, it was running, now it doesn't.
There is a noise coming from the head (which was machined ???, i dont know anything about that) we have gotten down to the valve springs and so far everythings normal. What would cause the noise and how can we fix it, or what do you think would be the problem its running obd0, with gsr cams, and maybe gsr valves and springs not sure.