|
Ok, if you have no air coming out of the unloader to the towers on the cylinder heads, you most likely have low pressure valve problems. 10psi intercooler pressure is way too low if the compressor has run for awhile. Take note however, this pressure reading will never be higher than tank pressure, so if you just turned the machine on, took the reading, then shut it off, it will be low no matter what. You must let it build up at least 80 - 100 psi tank pressure to get an useful reading. Sorry, I should have been clearer on that point. Personally, I'd start by pulling off the unloader tower covers and make sure that the pucks aren't seized in place. Make sure that the line going to the towers is not plugged (possibly letting air in but not out). If all the unloaders are free to move, you might have debris in the valves themselves holding them open, a broken valve disc, a worn valve seat or body, a loose valve in the head, a blown head gasket, or maybe cracked rings. Did you try running the compressor with the unloader out of the loop? You could remove the signal line to the heads (after the unloader valve), put a blower gun into the hose and cycle the unloader towers to start the machine. Maybe let it run unloaded for awhile to listen for any clunking which might indicate loose valves. I'd try to do as much troubleshooting as possible before tearing the heads or cylinders off, since it's heavy work with this machine, and requires a fair number of gaskets. Was it 10psi on both banks or just one? I am curious about the oil coming out of the breather tube. Worst case scenario is a holed piston, but I'd check to make sure there isn't too much oil in the machine. The breather should be at the end of a tube about 6" long. If it's right at the crankcase, you might get oil passing out even if there is no other problem. You can also do a flow test on the pump to see what it is putting out. I'd expect about 50cfm @ 100 psi, give or take. If we get to the point where you want to do this, let me know, I can walk you through it, it's not hard, but you would need a few pipe fittings, a valve and a pressure gauge.
|
