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Priming ls engine????

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Old Feb 12, 2009 | 09:47 PM
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Default Priming ls engine????

Since the LS based engines do not have a simple way to build oil pressure has anyone hooked up the starter and with plugs out just spin the motor????????
ANYONE???
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Old Feb 12, 2009 | 10:16 PM
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I am sure a lot of people have done that. I use a pressurizer and fill it with oil, tube the pressurizer up to the oil pressure sender connection, and use air to force a couple of quarts in to the engine before cranking it. Don't blow any air into the oil galleries, however. Turn the engine one rotation, do another couple of quarts. This fills all the lifters and oils everything pretty well. Top off the oil before cranking.
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Old Feb 12, 2009 | 10:23 PM
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There is a primer pump you can purchase that allows you to prime the pump from the drivers front side of the engine block
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Old Feb 12, 2009 | 10:25 PM
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Any more info??
who makes this pump??
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Old Feb 12, 2009 | 10:46 PM
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Originally Posted by pmj341
Any more info??
who makes this pump??
The one I have seen is a GM tool I guess it is a "engine preluber". You screw it into the oil gallery plug.

You can just as easily get plumbing fittings that fit the oil gallery plug and use a pump as all you need to do is prime the pump and insure there oil where there should be oil

Then you could also check GM for the pump

Ah you just got a new short block......correction once the heads are on and the valve train assembled...pump like hell to insure there is oil up top as I always like to insure that everything has oil. (Just changing a cam all you need is a couple of quarts to prime the pump). Boy that short block is Sweet

Last edited by Tommy D; Feb 12, 2009 at 10:54 PM.
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Old Feb 12, 2009 | 10:48 PM
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Originally Posted by Tommy D
There is a primer pump you can purchase that allows you to prime the pump from the drivers front side of the engine block
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Old Feb 12, 2009 | 10:49 PM
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I'll go to my Dealer and ask if they have this tool.
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Old Feb 12, 2009 | 10:57 PM
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i recall jegs had a primer but you may have to make up the plumbing line
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Old Feb 12, 2009 | 11:11 PM
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Originally Posted by Tommy D
The one I have seen is a GM tool I guess it is a "engine preluber". You screw it into the oil gallery plug.

You can just as easily get plumbing fittings that fit the oil gallery plug and use a pump as all you need to do is prime the pump and insure there oil where there should be oil

Then you could also check GM for the pump

Ah you just got a new short block......correction once the heads are on and the valve train assembled...pump like hell to insure there is oil up top as I always like to insure that everything has oil. (Just changing a cam all you need is a couple of quarts to prime the pump). Boy that short block is Sweet
Thanks
It's a work of art!!!
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Old Feb 12, 2009 | 11:12 PM
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Originally Posted by patton
i recall jegs had a primer but you may have to make up the plumbing line
I'll check on line!
thanks
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Old Feb 12, 2009 | 11:24 PM
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There is a plug in the engine block that taps right into the oil pressure system. The plug is on the left (drivers) side of the block down low at the front of the block. This is pretty easily accessed with the left front wheel removed. The plug is an M16 x 1.5 I made an adapter that was M16 male to 1/4 NPT female (sorry no pic).

I used my Motive brake bleeder. I drilled and tapped a 1/4 NPT hole in the bottom of the bleeder tank and screwed in a 2" piece of 1/4" brass hard line and put a shutoff valve on that. Then 3/8" clear flex tubing was ran to the M16 adapter in the engine block. I took the line off the Motive bleeder that usually runs to the master cylinder and connected an air line there.

Here it is with 2 quarts of Royal Purple ready to go




Here is the line going to the engine block, looking through the left wheel opening




I didn't want to fool with an air pressure regulator so I just bled my air compressor tank down to about 60 psi. I turned the ignition on and put oil pressure on the display and had my son watch it while I opened the valve. I wanted to get a pic of the engine off, with oil pressure, but there was no time. It took 8 - 10 seconds to empty the bleeder tank and I shut it off before it got to pumping air in the engine.

It took a few seconds, after I opened the valve, for the oil pressure to show on the dash but my son saw up to 48 psi. Then I removed my M16 adapter and replaced the factory plug and fired the engine up. I got no valvetrain clatter at all, compared to the usual 10-15 seconds of clatter that you usually get after a cam swap.
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Old Feb 12, 2009 | 11:28 PM
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Here's one that you can fill then pressurize with air for first start. It can also be mounted to use full time. (The FAQ talks about first time startup)

http://www.motorprelube.com/
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Old Feb 12, 2009 | 11:28 PM
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Now that I can do!!!
were did you get the bleeder tank?
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Old Feb 12, 2009 | 11:34 PM
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I got the bleeder setup from Summit Racing, they are available lots of places though.

My setup is still clean and ready, Drop me a pm if you want to borrow it
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Old Feb 13, 2009 | 08:23 AM
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Gotcha
I appreciate the offer, and I will take you up on it.
Sent you a pm
THANKS
Phil
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Old Feb 13, 2009 | 08:26 AM
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Gotcha
with your kit it will be easy, since it's a new build and on the stand.
I'll put a mchanical pressure gauge in the back of the block and whatch the pressure
and I'll have the Valve Covers off, so I'll see the pushrods and rockers get oil.
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Old Feb 13, 2009 | 01:39 PM
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Originally Posted by pmj341
Gotcha
I appreciate the offer, and I will take you up on it.
Sent you a pm
THANKS
Phil
Glad to help, congrats on the 427

Originally Posted by pmj341
Gotcha
with your kit it will be easy, since it's a new build and on the stand.
I'll put a mchanical pressure gauge in the back of the block and whatch the pressure
and I'll have the Valve Covers off, so I'll see the pushrods and rockers get oil.
Reply
Old Feb 13, 2009 | 01:47 PM
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I waited for as long as I could, I could not help myself when Katech lowered the price, that was the straw that broke my back ,and it's been a pleasure working with Jason.
My wife is still mad, but after 38 yrs she expects it.
Again THANKS
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