Brand new engine..builds maybe 10psi at 2krpm then 0 at idle.. - LS1TECH

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Brand new engine..builds maybe 10psi at 2krpm then 0 at idle..

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Old 04-19-2012, 09:45 PM   #1
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Default Brand new engine..builds maybe 10psi at 2krpm then 0 at idle..

So I fired my engine for the first time tonight and the car built maybe 15psi of pressure at 2k and when the revs came back down the pressure drops to 0. Gauge works correctly(verified)..the lifters are getting no oil whatsoever neither is the top end of the engine. Possible causes?

Im running a Mellings hi volume pump with the spring that came with it installed(hi pressure hi volume). I let the car idle for about 30 seconds twice..and it was so bad the car started to backfire violently(guessing its because the valves are barely opening)
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Old 04-19-2012, 09:55 PM   #2
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Do you have the oil galley plug (dumb bell) installed in the rear of the block or the plug installed in the front next to the oil pump on the driver side?

Thanks,
Shane
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Old 04-19-2012, 09:56 PM   #3
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ERL did the block. The plug is in the front. Im not sure about the rear...but im guessing they wouldn't forget to put those in.
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Old 04-19-2012, 10:51 PM   #4
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sounds like plugs are missing from the block and its leaking out. my machine shop guy forgot them too not to far fetched
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Old 04-19-2012, 10:51 PM   #5
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check the oil pump.

the valve train usually gets the oiling first.

if its not getting any oil up their then its possible it may be a pump issue.
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Old 04-19-2012, 10:55 PM   #6
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When turning the engine over with the rear oil sender out oil seeps out of there slowly. One thing I didn't do was soak the lifters but it still should of had something after running for 30 seconds. The car was popping and BAD. ALl the rockers look almost level (no oil in lifters)
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Old 04-20-2012, 02:39 AM   #7
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check the o-ring at the pickup tube and make sure it didnt get cut or pinched. gl
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Old 04-20-2012, 07:34 AM   #8
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Sounds like the rear oil galley plug was left out... It happens all the time.
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Old 04-20-2012, 10:53 AM   #9
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Removed the plug above the filter looked in there and saw no plug. >
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Old 04-20-2012, 05:57 PM   #10
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I think you should let it run some more first! Personally. if I couldn'y get ANY oil from the rockers during prelubing, I wouldn't attemp to start it.

I DO hope you primed your engine first. I would hate to think of the damage to EVERYTHING. Best of luck bro
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Old 04-20-2012, 06:10 PM   #11
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Put the plug in the hole and the pressure shot right to 60psi. It took about 45 seconds for oil to start coming out of the rockers but there's oil. The car also sounds like is has the 262/266 cam that I put in instead of a stock can. Let's just hope there's no damage.
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Old 04-21-2012, 06:58 PM   #12
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what is this rear plug you talking about? i tried to prime motor today and it wouldn't build any pressure at all.
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Old 04-21-2012, 09:26 PM   #13
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Little white plug to the left of the crank from the back.
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Old 04-23-2012, 11:27 AM   #14
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Check that the valley cover has seals to seal up the DOD ports also.
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Old 04-25-2012, 07:56 PM   #15
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Quote:
Originally Posted by 70shortwide View Post
what is this rear plug you talking about? i tried to prime motor today and it wouldn't build any pressure at all.
Here is what it looks like and it installs in the back of the block. There should also be a small freeze plug type of plug in the front of the block, under the timing cover off to the right of the cam.

http://ls1tech.com/forums/attachment...ug-ls1plug.jpg
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10, 10psi, 350, 350z, brand, build, engine, fan, front, galley, happen, idleing, left, oil, plug, psi, rear, top


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