Subject	The design of the oil pump is why you don't need to prime
Posted by	Obeeone on May 08, 2013 at 2:52 PM
	This message has been viewed 316 times.
In Reply To	Vacuum plenum for VG oil pump priming posted by Schmeal (NV) on May 08, 2013 at 11:24 AM
Message	The engine uses a rotary gear style which is a positive displacement pump. As taken from Wiki: "Rotary pumps are very efficient because they naturally remove air from the lines, eliminating the need to bleed the air from the lines manually". The will also flow at a constant volume based on rpm not by port size. So given a small hole or a big hole it will still try and move the same amount of fluid regardless.
Follow Ups	Vacuum plenum for VG oil pump priming - Schmeal (NV) 11:24:45 05/08/13 Eh, Why? - Ash's Z 13:01:49 05/08/13 No one else primes their oil pumps? (n/m) - Schmeal (NV) 13:39:20 05/08/13 I don't. Never had an issue. - Woody75 (Denver) 14:16:56 05/08/13 No issues here either. (n/m) - white22sky 14:29:25 05/08/13 No need to prime the pump - ZXRider 15:02:07 05/08/13 I do - aliaZ 15:09:34 05/08/13 yep, shop vacs are not fun on a fresh 1st time running motor (n/m) - maglito 16:46:23 05/08/13 The design of the oil pump is why you don't need to prime - Obeeone 14:52:30 05/08/13 Thanks for the detailed explaination. - Schmeal (NV) 15:39:10 05/08/13 not quite - aliaZ 16:54:32 05/08/13 Re: Vacuum plenum for VG oil pump priming - WazTTed 15:46:33 05/08/13 I primed my pump and I like your setup . I am surprised - Xteam300TT (South Tx ) 16:52:39 05/08/13 Doesn't take everyone to "VTF" a write up. - Woody75 (Denver) 18:24:29 05/08/13 Agreed , but iirc Guapo's write up had only positive - Xteam300TT (South Tx ) 20:25:17 05/08/13 I miss Guapo... (n/m) - TriniTT 09:12:12 05/09/13 Maybe at the time it was still kind of up in the air as to - Full_Metal_Jacket 20:56:40 05/10/13
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