LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

oil pump priming, a different way?

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Old Jul 25, 2008 | 10:28 AM
  #1  
JoeliusZ28's Avatar
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oil pump priming, a different way?

Basically I want to be sure I get oil pressure right away when i fire my car up because I just put a new cam in, and had the oil pump out as well. Ive read about the 'drill in the pump drive method' here but I am hoping to start my car this weekend and I dont have the tool or a right-angle drill.

On the other hand I do have a very long, level, and very smooth driveway. Right now I have the rockers off and plugs out.

i know it sounds incredibly stupid but could I prime the oil pump by just putting the car in gear and pushing it down my driveway?? or does the crank need to remain stationary?
Old Jul 25, 2008 | 10:39 AM
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Smile

Why not just replace the rockers and set the preload, leave the plugs out, pull the injector fuses and crank it over on the starter? It should spin fast enough to get oil to everyplace necessary.
Old Jul 25, 2008 | 10:46 AM
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i didnt think the starter spun fast enough, but that would be just as easy.
Old Jul 25, 2008 | 02:33 PM
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if an electric drill works why don't you figure starter would? those things have far more torque and spin the engine about 250-300 rpm. don't think the driveway method would work at all.
Old Jul 25, 2008 | 03:08 PM
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i thought you needed 500 rpm or so to achieve any form of oil pressure

Ill try the starter first to see what happens. I dont think I would have any problem getting it to spin that fast down the driveway with the plugs out and rockers off.
Old Jul 25, 2008 | 03:12 PM
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Originally Posted by YodiBrodi
if an electric drill works why don't you figure starter would? those things have far more torque and spin the engine about 250-300 rpm. don't think the driveway method would work at all.
For one many electric drills can spin at 2,000rpm or higher which would simulate a 4,000rpm engine experience since the cam spins once for every 2 rotations of the crank. A starter can't produce that much rpm or even close to it. If you have any access to a distributor you can modify the tip to where you can use it as your bit. Don't get me wrong the starter can push oil pressure but your motor is still turning over all together instead of having oil where it needs to be with no parts moving at all.
Old Jul 25, 2008 | 03:13 PM
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I feel your pain by the way. There is nothing worse than wanting to accomplish something the correct way and having to wait for a part or service before it can be done...

Old Jul 25, 2008 | 03:15 PM
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on second thought I think i am going to at least try the driveway method because I can do it without having the cam hardware installed... which means it wont be wearing on that stuff to prime the pump. I put lucas stabilizer on my timing chain, so that will be safe for at least a few full minutes of engine operation.

good point about the RPMs connexion

Last edited by JoeliusZ28; Jul 25, 2008 at 03:21 PM.
Old Jul 25, 2008 | 03:33 PM
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How are you going to put in gear and push it? I don't get that? Your a 6 speed right?
Old Jul 25, 2008 | 04:24 PM
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The starter will do the same thing and is the easier of the two. Pull the PCM IGN fuse so it won't try to fire or fuel.
Old Jul 25, 2008 | 04:51 PM
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I'll agree with you as far as going cam only with a new oil pump but I would not recommend that as the best route to take on a fresh motor.
Old Jul 25, 2008 | 05:07 PM
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Originally Posted by Connexion2005
How are you going to put in gear and push it? I don't get that? Your a 6 speed right?
um im gonna do just that??? ive started my car pushing it and jumping in. theres no compression now so i could probably just leave it in gear and run along next to it.

anyway whatever, im gonna do one of the two, this was just thinking out loud.
Old Jul 26, 2008 | 08:23 AM
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Hey man, without the sparkplugs the sarter can spin much faster b/c there is not compression building against it in the cylinders. My 93Z with 122k miles will make 60+ psi using the original starter and its soo much easier too.

If your using asymbly lube on everything you should be in good shape then.
Old Jul 26, 2008 | 10:36 AM
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Powerslide is right. Pull the plugs out and the PCM fuse, then crank it with the starter. There won't be any load on the crank and rods, because there won't be any compression. When you put the valvetrain together, use a generous amount of assembly lube. The engine turning over will develop oil pressure and it'll make it's way to the valvetrain in short order.
Old Jul 26, 2008 | 12:37 PM
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very good point... i guess what i was afraid of was overrevving the starter. Not in the sense that it might "blow up" but lose its footing on the flywheel or something like that.
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