Just an update, I tried messing with that oil pressure relief valve but it didn't make any difference. The engine probably needs to be...
That makes sense what you're saying, I'll give it a shot! I did try cranking it with it pulled out some but not for that long, so I'll try it...
PS: In the last picture there where I'm pulling out that solenoid pin thing with a pick tool, I have no idea what that is or what it does, nothing...
Ok, it's definitely not a class 7-8 truck but I'm desperate for some help! I bought this little Hatz 2G40 about a year ago, finally got some time...