Can a rebuilt engine start with no oil?
Can a rebuilt engine start with no oil?
On a newly rebuilt engine with the oil passages empty, it will take a while to prime it. You have to remove oil filter, put a funnel on the center hole, pour oil, manually turn the crank CCW until it stops sucking oil, put the oil filter back in, then start the car with no DME relay and no spark plugs.
Why do you pressurize the engine before cranking?
Rather than cranking the engine and waiting for oil pressure to build via the engine’s oil pump, pressurizing the oil circuits before ever cranking the engine will ensure lubrication that will protect the bearings and valvetrain from damage during the first rotation of the crank.
Can a late model engine be pre oiled?
However, late model engines that feature a front-mounted oil pump that’s driven by the crankshaft cannot be pre-oiled in this manner. The use of a pressurized pre-oiling tank allows you to easily push pressurized oil throughout the engine’s oil circuit without the need to turn the engine’s oil pump (the LS engine is but one example).
What to do if there is no oil in the oil pump?
I tried to prime the oil pump by pouring oil down the centre hole in the filter housing and manually turning the engine counter-clockwise. The oil was sucked back down but it still does not build presure. I then pulled the OPRV which was dry as a bone. I tried to turn the engine over with no OPRV, but no oil came out. What now?
On a newly rebuilt engine with the oil passages empty, it will take a while to prime it. You have to remove oil filter, put a funnel on the center hole, pour oil, manually turn the crank CCW until it stops sucking oil, put the oil filter back in, then start the car with no DME relay and no spark plugs.
Rather than cranking the engine and waiting for oil pressure to build via the engine’s oil pump, pressurizing the oil circuits before ever cranking the engine will ensure lubrication that will protect the bearings and valvetrain from damage during the first rotation of the crank.
However, late model engines that feature a front-mounted oil pump that’s driven by the crankshaft cannot be pre-oiled in this manner. The use of a pressurized pre-oiling tank allows you to easily push pressurized oil throughout the engine’s oil circuit without the need to turn the engine’s oil pump (the LS engine is but one example).
When does the oil pressure come back up?
After the engine has been running for about a minute or so the oil pressure finally comes up but not to normal. Once the engine has warmed up the oil pressure returns to what could be considered “normal”.
