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LQ4/9 no oil pressure !

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Old 05-01-2013, 07:11 AM
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yes,while building it. If it doesn't prime thru the port on the side today I'm going to drop the pan and redouble check it and the front plug.
Old 05-01-2013, 07:59 PM
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Do you have any oilcoming through the pushrods with motor running
Old 05-02-2013, 06:18 AM
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Originally Posted by 01WS6/tamu
Do you have any oilcoming through the pushrods with motor running

nope, I pushed 3 quarts thru the oil port on drivers side front last night and still no pressure with plugs out and fuel off. This weekend i'm going to drop the pan and see of something is amis there. When I pushed the oil in and took my oil pumper off, I had oil squirting back out. I had to cover the hole with my finger to until i got the plug back in. If nothing is found in the pan I guess i'll have to yank this thing back out and basically start over.
Old 05-02-2013, 08:23 PM
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It's either that plug in the main oil galley missing then or a cam bearing installed incorrectly and blocking a oiling passage.
Old 05-03-2013, 06:52 AM
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oil pan is coming off Sunday, I hope to find out something, if not I guess I'll be taking it out and rebuilding it again.

Last edited by BigDaddy0381; 05-03-2013 at 06:58 AM.
Old 05-16-2013, 10:18 AM
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after firing it up how long should it take oil to show up on gauge and at rockers?
Old 05-16-2013, 09:32 PM
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Oil pressure should show on the gauge in about 3-5 seconds.
Old 05-16-2013, 10:18 PM
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He got pressure to it today. 40 psi at idle
Old 05-17-2013, 01:49 AM
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What did you find?
Old 05-17-2013, 06:37 AM
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I pumped oil in the side of the block in the front oil galley port. I pumped 1 full gallon . I fired it up and it ran for about 3 minutes before the oil made it to the top end. I was still having no pressure on the gauge. I went and replaced the oil sending unit for a 4th time and wiggled the wires and walla oil pressure..... I let it idle about 27 minutes then drove it around the block. It seems like its going to be fairly strong combo. I got a check engine light that said ( low temp sensor voltage) or something like that. My temp gauge in truck wasn't working. The plug on the sensor that is in the head is cracked. I have to replace that and I hope my temp gauge starts back working.


This is after 27 minutes and a drive around
Attached Thumbnails LQ4/9 no oil pressure !-op.jpg  


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