How to prep and start a rebuilt engine
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Prelube the engine right before start up. Much is made of getting oil coming from all the pushrods, etc. but as long as the pump is pumping (you will definitely feel the drill labor when the pump is working) and you run the pump long enough to pressurize the system (plumb a temporary gauge to monitor the pressure while priming) and fill the oil filter and galleries, that's good enough- as soon as the engine starts there will be immediate oil pressure, and THAT is what's important- that the engine doesn't run w/o pressure. | Prelube the engine right before start up. Much is made of getting oil coming from all the pushrods, etc. but as long as the pump is pumping (you will definitely feel the drill labor when the pump is working) and you run the pump long enough to pressurize the system (plumb a temporary gauge to monitor the pressure while priming) and fill the oil filter and galleries, that's good enough- as soon as the engine starts there will be immediate oil pressure, and THAT is what's important- that the engine doesn't run w/o pressure. | ||
| − | It's up to the builder whether to use a pressure vessel (below left) | + | It's up to the builder whether to use a manual priming tool or a pressure vessel (below left) to prelube the oil system. Some engines require a pressure vessel because of how the oil pump is driven (some are driven directly off the crank or have a secondary shaft, etc.). Some examples of engines need to be primed using a pressurized primer system are the new MOPAR "Hemi", Ford Mod motors, and Chevy LSx. But most any engine can use a pressure preluber, regardless of the type of oil pump. |
When using a manual priming tool on a Chevy engine (example below right) there needs to be a collar at the bottom of the tool (red arrow) that completes the oil pathway that connects the passenger side to the driver side lifter oil gallery. If this collar isn't included, one side of the engine will not be pressurized and air will remain in the passages. | When using a manual priming tool on a Chevy engine (example below right) there needs to be a collar at the bottom of the tool (red arrow) that completes the oil pathway that connects the passenger side to the driver side lifter oil gallery. If this collar isn't included, one side of the engine will not be pressurized and air will remain in the passages. | ||
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