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Old 06-13-2013, 03:07 PM   #1
Ferociouscorpion
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Default Priming rebuilt motor issues

I put my rebuilt motor in and have been trying to prime it with no success. I pulled the ecu and been cranking it but the oil light is still on. Pulled the oil filter and no oil has made it through also.

Left the battery to charge overnight. Tested it with a multimeter and it was around 12v. Decide to pull the spark plugs so there was no compression being made but it still would not prime. Then I decided to test the battery while cranking it and it was only at 6v. Also every time I would try to crank it seemed like the battery was dying.

Here is the video.


I'm guessing with the bad battery the motor doesn't crank over fast enough to generate oil pressure. Just wanted to make and so people can make some suggestions.
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Old 06-13-2013, 07:39 PM   #2
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New battery same situation. Could the starter be bad? I may had fried the starter b/c I forgot where the negative ground from the battery was and attached it to the starter.

Last edited by Ferociouscorpion; 06-13-2013 at 07:51 PM.
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Old 06-13-2013, 10:10 PM   #3
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is there oil in it??

pull the line that goes to the turbo.....take the 'IGN' fuse out and roll it with the charger on the battery
do NOT turn the starter for more than 30 seconds without letting it cool for 2 minutes
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Old 06-14-2013, 10:56 AM   #4
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When I primed my engine I had to spin it for a while with the spark plugs removed before my gauge registered any pressure.
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Old 06-14-2013, 11:41 AM   #5
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Why did you pull the ecu?
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Old 06-14-2013, 02:46 PM   #6
Ferociouscorpion
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Pulled the ecu so it wouldn't actually start the motor. Same thing can be done by pulling the ign fuse or crank sensor or what not but this is how I did it when I swapped it so I was more comfortable doing this.

Well I've read through every thread on nasioc, iwsti, clubwrx, and rs25 and tried everything no luck.

Contacting my builder to see what he says. The motor is turning over but no oil being pumped anywhere. Pulled the oil filter and still dry no oil in it.
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Old 06-14-2013, 02:51 PM   #7
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How long did you let it crank? Like 30 seconds?
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Old 06-14-2013, 03:21 PM   #8
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Yeah I've cranked it for 30 secs, tried cranking it in intervals of 10secs, up to 5mins and still nothing. When I swapped my car the light turned off in 30 secs. This time after the rebuild idk why it isn't building up any oil pressure.
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Old 06-14-2013, 03:44 PM   #9
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if it's cranking and not building pressure after about 10 seconds of cranking (even slow cranking as the pump simply sends the volume out) then you may have another issue.

Might take two people to see if there is oil actually going through into the housing and priming. If not, then there's something else going on.

Also, there are times where after fresh rebuilds it can take a minute to get the car to catch and idle, but oil pressure should be risen with simply cranking the engine enough to get the oil past the sensor.

-Mark
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Old 06-18-2013, 10:11 AM   #10
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Finally got it working. Had to actually start the car. Planned to have it turn on for 3 sec to see if it builds oil pressure instead I may have panicked a bit and turned it off after 2 sec since the oil light didn't turn off.

When I pulled the oil filter oil poured out and I was pretty happy after this long week. Pulled the crank sensor to prime it and it primed then started it up and everything is all good.

I'm guessing while trying to prime, the crank wasn't turing fast enough to create oil pressure on my build.

I don't suggest anyone do this the first time but this was my last resort. Plus I had the ok from my builder.
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Old 06-18-2013, 10:15 AM   #11
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a good moly assembly lube will get you through a handful of seconds...
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Old 06-18-2013, 01:21 PM   #12
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Quote:
Originally Posted by Ferociouscorpion View Post
Finally got it working. Had to actually start the car. Planned to have it turn on for 3 sec to see if it builds oil pressure instead I may have panicked a bit and turned it off after 2 sec since the oil light didn't turn off.

When I pulled the oil filter oil poured out and I was pretty happy after this long week. Pulled the crank sensor to prime it and it primed then started it up and everything is all good.

I'm guessing while trying to prime, the crank wasn't turing fast enough to create oil pressure on my build.

I don't suggest anyone do this the first time but this was my last resort. Plus I had the ok from my builder.

man...you are doing all sorts of stupid **** on this

jesus..what a waste of all involved
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Old 06-18-2013, 09:37 PM   #13
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You act like I didn't try everything mentioned in this thread or searched through countless other forums.

Even had a buddy of mines who had his motor rebuilt come and help me. We went through all these steps and still nothing. This was my last resort other than pulling the oil pump. And it was okayed by my builder.

No wonder nasioc is the ****hole of the Subaru community.
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