| Author | Message | ||
     Ishampadron |
I have a dry motor and I want to gently prime the oil system by hand by going into 5th gear and manually turning the rear wheel. Does anyone know how many full revolutions of the wheel it would take to get enough oil flowing into the system? Also what would be a good way to test that we are primed? Perhaps, taking the rocker cover off and seeing the oil come up. | ||
| Teeps |
Why is the engine "dry"? | ||
| Ishampadron |
Oil was drained and motor has been sitting for months since I bought it. | ||
| Teeps |
If mine, I would put oil in the bag. Start the engine then let it idle until the oil light turns off before reving it over idle speed. | ||
| Audiowize |
Take the spark plugs out, then use the starter motor to spin up the engine. Since you have a dry motor, just unplug the fuel pump so there's never any fuel pressure to squirt gas into the engine. I can't remember for the XB, but for some engines the oil pressure light can be extinguished with the starter motor spinning up an engine with 0 compression. | ||
| Ducbsa |
Does firing ungrounded plugs hurt the coils or anything else? | ||
| Livers |
I'm with Teeps. | ||
| Griffmeister |
You can ground the plugs so there’s no change in electrical load. The engine may not be as dry as you think. When I had to fix my transmission, my engine really was dry. Good thing I pre-lubed everything on reassembly, it took a god awful time to turn the light off. Be prepared for a lot of cranking. | ||
| Ishampadron |
Thanks guys but y'all didn't answer my question. Lol. The motor is not even in the frame yet. I wanted to prime it to make sure things are moving nicely before i put the engine in because it's a used motor i really don't trust it 100%. | ||
| Shoggin |
You have to spin the oil pump to build pressure and get flow through the engine. Your choice how you do that. Putting in a used engine? Just put it in, fill with oil, start. Don't be crazy cold engine revving guy. | ||
| Griffmeister |
Maybe drill a hole in a spare filter and weld or braze a pipe nipple to it. Then plumb up some kind of hand pump that you can use to fill the system. Have to double check a lube diagram to see if that’s a good spot. | ||
| Teeps |
Ishampadron Posted on Tuesday, September 04, 2018 Thanks guys but y'all didn't answer my question. Lol. The motor is not even in the frame yet. Might should have led with the engine is not in the frame. I doubt anyone here has ever "primed" a dry engine, as you describe; hence no direct answer to your question. | ||
| 1_mike |
To answer the original question... NO, won't work. It's not the by "slow", hand spun "revolutions" of the crankshaft/oil pump, it's the "speed". Turning the crankshaft/oil pump by turning the rear wheel (in any gear) is not going to do anything at all. Most bike engines aren't like a car engine, where it normally easy to prime the oil system. You can't get to the oil pump to spin it. As long as the engine was either running or "properly" assembled, it will have enough oil to protect the rubbing parts until the pump can push the oil thru the system. Probably take about 2 to 4 seconds after the engine starts for the oil light goes out. Mike | ||
| Akbuell |
If the engine is sitting on the floor: Strap it down so it is stable Hook up a battery to the starter and the engine case Hook up an 'IV' bag to the oil inlet and return Remove the plugs Using a jumper wire as a start switch, spin the motor over for a few seconds at a time, to avoid overheating the starter Look for oil coming out of the return line A multimeter to the oil pressure switch will (should) let you know oil is flowing before it fills the return line Hope this helps, Dave |
