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Is there a way to oil prime the 4.6 without turning it over?

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Old Apr 3, 2014 | 06:52 AM
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ImQuattro's Avatar
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Mudding
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Unhappy Is there a way to oil prime the 4.6 without turning it over?

So I'm rebuilding the motor which includes all new bearings, new cam, new lifters, and new rings, etc....
I will be using break in oil, as the zinc & phosphate levels have been so greatly reduced in nearly all the typical oils on the market that were used for breaking in a motor.
Typically, most domestic V8's oil systems were able to primed by spinning the oil pump through the distributor drive. Can't do this on the LR motors as the oil pump is driven off the crank.
Catch is, it's not recommended to crank the engine over to build oil pressure when you're breaking a motor in -at least not with flat tappet cam & lifters.

Is there any way to pressurize the oil system without cranking these motors over? My only idea is to go in through a removed oil pressure sensor with pressurized oil but I'm not certain the oil will circulate the correct way.
Help?

I did pack the oil pump.
 

Last edited by ImQuattro; Apr 3, 2014 at 07:05 AM.
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Old Apr 3, 2014 | 09:36 AM
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Read this Thread: https://landroverforums.com/forum/di...rite-up-48197/

At the end he talks about and explains how to prime the oil system before starting.

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Old Apr 3, 2014 | 11:49 AM
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Mudding
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Right! Forgot about that one! Read that article a while back.
No such canister at harbor freight anymore, wonder if I could use a garden sprayer... same concept... I'll have to check the pressure rating.
Good idea!
Thanks
 
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Old Apr 3, 2014 | 01:10 PM
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I have a pump sprayer that I set up for bleeding brakes and I fitted a pressure gauge on it and have pumped it up to 25 psi. You need to be worried about the hose letting go at that point. With an '04, you can tap into the oil system at the plug just above the filter where the oil cooler lines were installed on the earlier years. Get the adapter for the 1/8" NPT and put a pressure gauge sender there when you are done.
 
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Old Apr 3, 2014 | 09:02 PM
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From: Boston Strong
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me thinks you're over thinking it a little

fill the pump and filter with oil and use plenty of assembly lube, if you want put any impact on the crank and get a little pressure before you button it up. once it starts you are going to be running at 2k for like 20- min. (whatever the cam man. suggests) to break in the cam, that's the purpose of assembly lube.
 

Last edited by drowssap; Apr 4, 2014 at 08:47 AM.
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Old Apr 4, 2014 | 05:51 AM
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Mudding
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Funny you should say that. I had just had a discussion with a friend who's rebuilt a few motors after I posted here last. He noted that while the idea of pressurizing the oil system the way that guy did was a novel idea, it was mostly pointless as once the pressure stops, the oil drains back out. With assembly lube, a packed pump, an oiled filter and break-in oil in the pan, oil pressure should be made pretty quickly and, you're correct, thats the purpose of all those products, to protect during that time.
I think I'll be fine.
Just rather over think than under think
 
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Old Apr 4, 2014 | 05:58 AM
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From: Boston Strong
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i here yuh
 
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