Alright, its been awhile...
So its always had low oil pressure, but the last few weeks Ive been hearing a knock at idle, Sounds higher up in the engine, something like wristpins maybe, so Ive picked up an engine to rebuild. Unfortunatley Isuzu parts are scarce around my area, found a fellow with a few engines, he is the only one with those 3.2s and he knows it. It cost me $400. The story I was given, is that an owner of a Rodeo, always took it in for regular service, but something in the motor went and it was either rebuilt or replaced. Then shortly after that, the tranny went and the owner sold this rodeo cheap, to the guy I bought the engine from.
When I picked it up, the upper timing covers were off and the timing belt was gone. It was late so I didnt inspect the engine much untill today. I could turn one cam by hand, but the other wouldnt go so my mind instantly jumped to "Seized cam" but once I got the valvecover off and saw that everything looked good, infact almost new, I put a breaker bar on the end of the cam and it turned with ease, the rockers/valves were just holding it.
So I pulled the intake, and it all looked clean, and I tried to pull the one head, that I already had the valvecover off of. Ive heard horror stories of headbolts either rounding off, breaking, pulling all the threads out with the bolt, and just in general being a pain in the butt. but pretty much all of mine came out no problem, all of the 10mm hex ones came out with almost no effort, just my 12" breaker bar, which makes me think they werent fully torqued when they were installed. Although, the 3 smaller, 6mm hex bolts at the front gave me trouble. There was evidence of someone being in there, and all of those bolts were starting to round off. I got 2 of them, but the one in the middle rounded completely on me. I dunno how Im gonna get it out.
I was gonna bolt it to the stand today but the bolts I bought were about an inch too short, otherwise the pan would have come off. But overall the engine looks like its in good shape, although looking in through the intake ports a couple cylinders have some rust on the intake valves, looks like its just sitting on carbon, hopefully its just a wire brush and a valve job to get rid of it.