Update for those following my last thread about the ol' bobcat. Well, we got in the new engine to replace the old Kubota V2203,(replaced with the same), and it has been a complete nightmare! The old engine had been through it all, but its being replaced because of the massive Blow-by from the ventilation tube.(a pulsing,and blowing oil everywhere) which would tell us the oil rings had worn out.So we got on to the task of pulling the engine.which i missed the 1st time,but heard was no problem, so we put what we needed on the old engine (oil pan,hand primer,etc..).Well the 1st time we put the engine in with no problems it might have taken us 2 hours, and we got it ready,cranked it. It cranked and cranked and slowly started a terrible squeal and then locked up. wouldn't turn over at all. So after taking the belt off to see if it was the source of the squealing(which it wasn't) i pulled the starter to check the flywheel. which i saw to have a gouge in. After investigating with a bore-o-scope we found a bolt wasn't run down on the back of the bell housing(day classes oops). So we pulled it back out got the bolt out, tapped the hole,and got everything ready and torqued to spec. Got the engine in and everything hooked up. Started cranking and the line coming from the filter to the pump was air locked. so we bled and bled and bled the lines. It fired up! But was idling pretty rough. so we had to do a little afro engineering after breaking a bolt off to the throttle hold bolt. Well we got it idling good and it seemed like everything was good. Today we went to fire it up for a test run and it took forever to finally get it to fire. (had to bleed the lines again). well we took it for a test drive and it seemed to be doing fine until i took it down the hill beside the school. It about didn't make it back up.... NO POWER..it boggs down on a 10 degree slope.well we continued to run it. dig some holes, run it through different applications. brought it back into the shop and there were leaks everywhere! fuel line leaks, oil leaks, coolant leaks...all from things that were assumed to be torqued to spec on arrival. well we got all those leaks sorted and noticed it still has quite a bit of blow-by in the vent. tube.....is this a V2203 common? or do we need yet another engine? compression test tomorrow. any ideas on the power issue?
If it's a rebuilt engine (long block?) it may take a few hours for the rings to seat. Shouldn't but it is possible. The power issue could be anything, from blocked fuel lines, sucking air somewhere in the fuel pickup side, blocked air intake, valve adjustment, injection timing, fuel shutoff adjustment, or possibly a hydraulic issue, just to name a few obvious culprits. Good luck with her.
the compression test showed very very low compression in all cylinders.spec called for 510-570 or bare min. 370. we were reading 260 in 1,2, and 4 and 280 on 3. were thinking maybe over bored, or they put the old pistons in with the new bore size.so we are sending the old engine to him and he is going to rebuild it for us. i will update when we get it next week. hope this one goes better than the last.