oil priming new crate ls3 engine
Thread Starter
Staging Lane
Joined: May 2011
Posts: 54
Likes: 1
oil priming new crate ls3 engine Is it this tool compatible with new crate ls3 engine for priming with oil prior to first starting? I dont want to crank it before full priming.
http://store.gmperformanceparts.com/...-12368084--%3E
http://store.gmperformanceparts.com/...-12368084--%3E
Thread Starter
Staging Lane
Joined: May 2011
Posts: 54
Likes: 1
There won't be much load if you pull the plugs. If it's freshly assembled, it'll have lube on all of the bearings, which should suffice until the oil pressure builds up.. and the georotor pump WILL suck oil even when it's completely dry.. It doesn't have to be "primed," per se. If you REALLY wanted to prime it, I guess you could drill/tap the blockoff plate above the oil filter, and use a pressure brake bleeder full of oil to prime the pump... I have always just pulled the plugs, disabled the fuel circuit, and spun the motor until I saw oil pressure. Works fine.
edit: Or hook it to the oil pressure sending unit hole.
edit: Or hook it to the oil pressure sending unit hole.
There won't be much load if you pull the plugs. If it's freshly assembled, it'll have lube on all of the bearings, which should suffice until the oil pressure builds up.. and the georotor pump WILL suck oil even when it's completely dry.. It doesn't have to be "primed," per se. If you REALLY wanted to prime it, I guess you could drill/tap the blockoff plate above the oil filter, and use a pressure brake bleeder full of oil to prime the pump... I have always just pulled the plugs, disabled the fuel circuit, and spun the motor until I saw oil pressure. Works fine.
edit: Or hook it to the oil pressure sending unit hole.
edit: Or hook it to the oil pressure sending unit hole.
so basically what i just said. lol
Staging Lane
Joined: Feb 2010
Posts: 61
Likes: 0
From: UK Leeds
I tried to get oil pressure on my new LS3 with the plugs out on the starter motor. Tried several long cranks but no sign off pressure. I fired it up anyway and pressure came up instantly. Looking back I wonder whether you are better off just firng the motor up. When I was cranking it with no pressure it cant have been doing the bearings much good, even with the plugs out.
Trending Topics
I tried to get oil pressure on my new LS3 with the plugs out on the starter motor. Tried several long cranks but no sign off pressure. I fired it up anyway and pressure came up instantly. Looking back I wonder whether you are better off just firng the motor up. When I was cranking it with no pressure it cant have been doing the bearings much good, even with the plugs out.
ive always packed the pump with vasaline before starting. of course, these were new motors with plenty of assembly lube on all the bearings. i could never get any oil pressure just cranking it.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
I tried to get oil pressure on my new LS3 with the plugs out on the starter motor. Tried several long cranks but no sign off pressure. I fired it up anyway and pressure came up instantly. Looking back I wonder whether you are better off just firng the motor up. When I was cranking it with no pressure it cant have been doing the bearings much good, even with the plugs out.
Launching!
Joined: Sep 2009
Posts: 260
Likes: 0
From: greensboro, nc
Newer computers will not register oil pressure until the engine is running, you can however check your pressure with a mechanical gauge if feel the need.
Last edited by G Engines; May 30, 2011 at 08:20 AM.
They way I do it at the shop is I use a manual guage in the oil pressure sender port, then mount the starter and spin it with a battery. I also leave the plug out. I see about 5-9 psi then when I fire it the pressure is there.
Launching!
Joined: Aug 2010
Posts: 242
Likes: 0
Usaually if it is applicable I take the line coming from the pump off and fill it with oil then I turn the motor over by hand backwards a couple of turns. That primes the pump and gets rid of any air in that part of the line. Then hook it all up and crank a few times with the the plugs out and it is always good to go.
I read a post where someone put about 19 quarts of oil and spun the carnk until he saw pressure. He then drained it and put the right amount of oil in the motor and then cranked it and worked just fine. I kind of like this idea since you know that 19 quarts will fill every freaking crack. You also know that the oil pump will be primed and no air will be in the system.
TECH Senior Member
Joined: Jul 2009
Posts: 8,034
Likes: 663
Why would anyone buy a new engine and cheap out and spin the motor until you built up pressure. Doesn't make sense. Even if some people "get away with it" . Get a large size PVC 12" or 18" pc long and cap both ends Put a fuel cell fitting for the supply and put a schrader valve. I wish I went this route instead of buying the Engine Quest primer, that's basically a small LP tank.
I've seen a few people use a old fire extinguisher too. Same principle.
I've seen a few people use a old fire extinguisher too. Same principle.
TECH Apprentice
Joined: Sep 2006
Posts: 328
Likes: 3
You do realize that there is nothing to keep gravity from pulling all the oil from the system every-time you shut the engine off?
Depending on how long it sits between starts, you are basically "priming" the oil system every time you start the car, and absolutely doing it, every time you change the oil.....
Depending on how long it sits between starts, you are basically "priming" the oil system every time you start the car, and absolutely doing it, every time you change the oil.....
I'm glad this isn't my money that's being spent. 
http://www.youtube.com/watch?v=tOYLl...layer_embedded
http://www.youtube.com/watch?v=tOYLl...layer_embedded
I tried to get oil pressure on my new LS3 with the plugs out on the starter motor. Tried several long cranks but no sign off pressure. I fired it up anyway and pressure came up instantly. Looking back I wonder whether you are better off just firng the motor up. When I was cranking it with no pressure it cant have been doing the bearings much good, even with the plugs out.
Thread Starter
Staging Lane
Joined: May 2011
Posts: 54
Likes: 1
LS3 engine dont have any access to oil pump shaft for spinning it with drill?
OK, if I pump oil via oil pressure sender above oil filter, is it possible to view comming oil via oil filling cap on top of engine?
Something like this scenario:
http://www.dsmtuners.com/forums/arti...installed.html
OK, if I pump oil via oil pressure sender above oil filter, is it possible to view comming oil via oil filling cap on top of engine?
Something like this scenario:
http://www.dsmtuners.com/forums/arti...installed.html
not really because the oil pump would need to pump it back up into the rocker arms.... No one on here primes their oil system like that just do what we all do which is pull the fuel lines/plugs/coil packs and turn the key for 5 seconds a few times. I just did this on my new ls6 and it worked great