Originally Posted by
Stavros
I know that, but how does dumping a ton of oil in to the sump or whatever pressurise anything?
Once engine running and pump moving I understand it totally, but dont get the oiling pre-engine start bit really.
it pumps the oil into the oil gallery. so the oil is taking its usual path round the engine, but the air pressure in the accusump is what is pushing it,
not the oil pump.. (pumped into the engine via the Oil light switch-hole just after the oil filter)
depending on how you plumb it in, a one way valve in the system stops the oil from being pumped straight into the sump.. failing that the one way valve in the oil filter should do that too.
EDIT: as regards 'do they work/dont they work' well, i can see no real reason why they dont, or at least help anyway. IF you get the right size (car engine will need 4 pint Minimum)
Trouble is, the only time you will know for sure if its a waste, is when you see a rod
I know mine supplies the engine with just over 2 bar of oil pressure for about 10-15 seconds before starting the engine.