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oil pump/pressure problems-Fixed.....

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Old Jun 25, 2010 | 08:18 PM
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Default oil pump/pressure problems-Fixed.....

Ok, I purchased a 5.3L from LKQ good or bad it doesn't matter. Supposedly 62K miles, removed heads, and stock cam put in Thumpr and 243 heads. GM muscle car oil pan going into chevelle.

Installed in car had zero oil pressure. Decided that if i am going to go to the trouble of making sure the pickup tube is sealed correctly i am going to replace the oil pump and installed pickup tube girdle from BRP. I am confident that the tube and pump are sealed up at this time. Spend 3 god damn hours getting the pickup tube bolts installed but finally got the damn thing in and tightend both bolts up on the girdle. (did not remove engine from car)

STILL NO F'n oil pressure. Intalled mechanical gauge on back of engine block and have no oil going up to the heads period.

I am ready to light a match except the garage is below my kids bedroom!

In my mind the oil galley plugs are all in place.

HELP!!!!!!!




Last edited by 70lx327; Jul 5, 2010 at 12:17 PM. Reason: problem fixed
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Old Jun 26, 2010 | 03:25 AM
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Did you pinch the o-ring in the pump? Or possibly install it without it?
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Old Jun 26, 2010 | 04:34 AM
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i don't think i did but anything is possible. any other possibilities.
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Old Jun 26, 2010 | 12:59 PM
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Originally Posted by orangeapeel
Did you pinch the o-ring in the pump? Or possibly install it without it?
ran into this problem on a 99z but we still had pressure it was just really low
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Old Jun 26, 2010 | 06:36 PM
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Maybe the oil pump is bad?? Assuming the gallery plugs are installed i.e. barbell at the back of the block and the plug behind the front cover?
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Old Jun 26, 2010 | 11:01 PM
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Originally Posted by BlackBird87
ran into this problem on a 99z but we still had pressure it was just really low
Sometimes it can get stuck as well and register 0.
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Old Jun 26, 2010 | 11:04 PM
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Originally Posted by orangeapeel
Did you pinch the o-ring in the pump? Or possibly install it without it?
I am gonna agree with this. My buddy made the same mistake.
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Old Jun 27, 2010 | 08:22 AM
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do the bar plugs go bad? fall out? anything strange like that? THis is a pull out engine and i was never into the block that far. cam and head swap is all i have done.....
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Old Jun 29, 2010 | 09:03 PM
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Originally Posted by 70lx327
do the bar plugs go bad? fall out? anything strange like that? THis is a pull out engine and i was never into the block that far. cam and head swap is all i have done.....
no they dont
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Old Jun 30, 2010 | 05:38 AM
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Thanks, its got to be something simple. I haven't had much time to work on it lately so hopefully this weekend i can reasses the issue.
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Old Jul 5, 2010 | 12:16 PM
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oil pressure problem fixed. packed the oil pump with assembly lube/grease and pickup tube with oil and priming problem fixed. thanks for all the help.
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