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If you didn't already purchase, check Mayi diesel. They have good prices. Maybe check the timing cover to see if there is a notch on the pulley and a mark on the cover. If so, just make it so they a somewhat out of alignment. You could also pull an injector and stick a wire in the hole to feel...

Yes, Joseph is correct you can simply turn the crank so that none of the rod journals are straight up. After you tighten the rocker arms back down, leave it for at least an hour before you crank the motor at all. The lifters need time to settle down do that your valves don't hit again. Think the...

Yes, there is a gasket on the side cover. Many times you can reuse it if it doesn't get damaged or just replace it. You can get an entire LPW4 gasket kit on ebay for under $70 or you will probably pay 1/2 that for just the side gasket from Onan. Here is a new relief valve...

The relief valve is a 1" diameter tube about 6" long screwed into the back of the oil pump right next to the oil pump pickup tube. Its all the way to the left looking into the open engine side cover, points down on a 45 degree angle almost touching the bottom of the crankcase. Normally they can...

If you start it and it quickly dies, then sounds like it has no compression when you try to restart it.... then you let it sit 1/2 hour and it has compression again.... that is the typical scenario when oil pressure goes too high and you hydrolock the lifters. This causes the valves to stay...

I've seen this a couple times when the weather gets cold. Try putting a mechanical oil pressure gage in it. You need a gage with a 1/8" NPT thread. Screw it in in place of the original sender for the gage. Start it up and check the oil pressure immediately. If the pressure goes too high ( above...