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Unread 06-20-2013, 09:44 AM   #1
Greekcj5
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1973 CJ5 
 
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AMC 304 rebuild no oil in valve covers

Hey everyone,

So here's the jist. I rebuilt my 72 304 and it fired up almost instantly. I let it run for about 25 minutes and then removed the valve covers to make sure oil was traveling throughout and realized there wasn't any oil in the valve covers. The push rods, rockers etc. were dry so now I'm worried that i did something wrong. I pulled off the intake manifold and the lifters all have oil and the oil pressure at idle settled at about 25psi @ 700 rpm. Any thoughts of what might be the problem?

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Unread 06-20-2013, 09:11 PM   #2
petey156
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I would get a oil pump primping tool, One that you turn with a drill., Then pull the valve covers, and check for oil flow while the drill is running.

Did you remember to reinstall the oil plugs at the rear of the engine?
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Unread 06-20-2013, 09:23 PM   #3
jblue1555
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Who did the machine work? Who put the engine together. What were the clearances set at. Did you check oil pump specs?
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Unread 06-20-2013, 09:33 PM   #4
Greekcj5
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Petey, i did make sure the oil plugs were in and I'm using a flat heat bit socket on a long extension connected to my drill to prime it. I'll pull the covers and check. Jblue, i took the block to a machine shop for the honing, cleaning, etc. i put it back together myself as my first rebuild. I checked all the specs when installing everything. The valves, lifters, push rods etc. went in the way they came out. It's taken me 6 months to put it back together cause I'm making sure everything is in spec. Just getting hung up on this oil thing now.
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Unread 06-20-2013, 09:34 PM   #5
Greekcj5
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Quote:
Originally Posted by jblue1555 View Post
Who did the machine work? Who put the engine together. What were the clearances set at. Did you check oil pump specs?
I reinstalled the same oil pump.
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Unread 06-20-2013, 09:52 PM   #6
petey156
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Rebuilt motor should have had a new or rebuilt pump... If it were mine
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Unread 06-20-2013, 09:52 PM   #7
petey156
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What was the hot oil pressure
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Unread 06-20-2013, 10:59 PM   #8
Greekcj5
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In the low 50s.
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Unread 06-22-2013, 11:01 AM   #9
Greekcj5
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Turns out it just needed more oil. Poured another quart and when i primed it it finally caught the oil and started coming out of the push rods. I feel like an idiot but now it's got 6 quarts in it. Is that normal for some CJs?
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Unread 06-22-2013, 03:19 PM   #10
jblue1555
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wasn't the problem. Its ok to run 6 because they hold a lot of oil in the top end. Did you pack the oil pump before you tried to prime it?
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Unread 06-22-2013, 07:55 PM   #11
petey156
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IMHO, If you had oil pressure, Low oil is not your problem.
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Unread 06-22-2013, 08:01 PM   #12
bear991
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You never put a old oil pump in a rebuilt engine. That would be like reusing old gaskets on a new engine. Pull the old pump and replace it before you wish you had.Trust me I've been doing this for a living for a long time
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Unread 06-22-2013, 08:11 PM   #13
Greekcj5
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I completely understand. I've taken jblue's advice and ordered the new pump kit. I have a different problem now though and I'm starting to think even though I'm mechanically inclined and not a total idiot, i might not be cut out for rebuilding engines. Thanks for the advice gents
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