Attention: TDR Forum Junkies 
We have a series of wheel loaders that are 2005 ish Komatsu 380-6 powered by what I always thought was a QSB 5.9. They've been good machines, fairly trouble free although perhaps a bit complex with some controls for the guys that use them.
We've been tracking one that's been using enough engine oil to empty its crankcase in a shift.
Once we found the oil fill cap off- AHH! That's it! Nope, still leaking. So after chasing this thing around and getting it in the shop, we narrowed it down to a spot behind a plastic plate that holds the ECM. What could be behind that?
So we dug in, and much to surprise, there is an angled galley that ends in a small expansion plug that's rotted out just below the head! Seems that's it's not full pressure there, but enough to allow a small geyser. We're wondering what this port was/ is used for? And another discovery I made was that this is a QSB (rear accessory drive) but it's a 6.7, a bit before I thought they came out. Do our Ram blocks have this port?
The top image is 90* off. The galley runs vertical.
We've been tracking one that's been using enough engine oil to empty its crankcase in a shift.
Once we found the oil fill cap off- AHH! That's it! Nope, still leaking. So after chasing this thing around and getting it in the shop, we narrowed it down to a spot behind a plastic plate that holds the ECM. What could be behind that?
So we dug in, and much to surprise, there is an angled galley that ends in a small expansion plug that's rotted out just below the head! Seems that's it's not full pressure there, but enough to allow a small geyser. We're wondering what this port was/ is used for? And another discovery I made was that this is a QSB (rear accessory drive) but it's a 6.7, a bit before I thought they came out. Do our Ram blocks have this port?
The top image is 90* off. The galley runs vertical.
