New Motor...No oil getting to the top end - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-03-2006, 12:53 AM   #1
IKZ
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Default New Motor...No oil getting to the top end

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New Motor in...No oil getting to heads! Please Help.


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IKZ



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PostPosted: Tue May 02, 2006 6:16 am Post subject: New Motor in...No oil getting to heads! Please Help. Reply with quote Edit/Delete this post
I got my new motor installed and after a few small problems (coil packs switched 180 degrees, coolant leak from faulty o-ring, etc. I can start the my car but oil isn't getting up into the heads. Could there be a blockage in the oil passages, or maybe air trapped preventing oil flow? I briefly tried revving to 2k-3k to upclog things (which helped only a little) but I obviously cant do much of that.

Any Ideas?

Edit: 1993 Bonneville SE...only mod is a CAI.
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BillBoost37



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PostPosted: Tue May 02, 2006 6:19 am Post subject: Reply with quote
Did you change oil pans, dipsticks or pickup tubes? And how is the oil pressure?

Could be that it was sitting long enough that the lifters need to be pulled and soaked to refill or run long enought o pump up...which isn't good either.
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daman



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PostPosted: Tue May 02, 2006 6:20 am Post subject: Reply with quote
Whats your pressure Gage read???
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PostPosted: Tue May 02, 2006 6:21 am Post subject: Reply with quote
Damn Bill always on the trigger....LOL
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PostPosted: Tue May 02, 2006 6:22 am Post subject: Reply with quote
Beer Chug Not a race to see who'* faster. Only to help out as quick as we can.
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PostPosted: Tue May 02, 2006 6:24 am Post subject: Reply with quote
BillBoost37 wrote:
Beer Chug Not a race to see who'* faster. Only to help out as quick as we can.


I know......J/K thumbup
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PostPosted: Tue May 02, 2006 9:19 am Post subject: Reply with quote
IKZ, you better tell us exactly (and in great detail) what you had apart during the install. Heads? Oil pan? Timing cover? Anything else? Did you pre-prime your valvetrain (front and rear bank) with oil before attempting to start?
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PostPosted: Tue May 02, 2006 9:54 am Post subject: Reply with quote
Agreed, what all did you have appart?

If you had the coverd off did you replace it or simply reuse it?
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IKZ



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PostPosted: Tue May 02, 2006 1:22 pm Post subject: Reply with quote Edit/Delete this post
Will,

I took just about everything off. I bought a remaned long block; I had to reuse my oil pan, water pump, and valve covers. The long block came with a new oil pump. Front and rear banks were pre-primed.

For some reason though...there is really low oil pressure on the top end. I took out the pressure sending unit and also the oil filter...Oil is at least getting to there. The pressure has improved a little since the weekend, but theres still not enough.

Any clue?
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New postPosted: Tue May 02, 2006 1:25 pm Post subject: Reply with quote
IKZ.. the parent site is back up. I suggest you copy this last post and bring it over to www.bonnevilleclub.com into the 92-99 mechanical section.

It'* odd for sure, especially with a basically new long block. When you put the timing cover on...did you pack the oil pump with vasoline or anything like that? It'* needed to prime the motor properly.
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Old 05-03-2006, 01:02 AM   #2
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OK, so heres a recap.

New longblock went in. I reused my waterpump, valve covers and oil pan. The Long Block came preassembled with the timing cover already installed.

The engine was primed, lubed for start up, and starts up fine. Oil at least gets through the filter and the pressure sending unit. Oil pressure gauge reads ~40psi.

I called the engine manufacturer who said there may be a clog in the system and that they will send me a force primer.

This is a pretty neat tool. It will pressurize the oil system to 100psi and force all 4 1/2 quarts of oil through the system to unclog anything that may be blocking the way.

Well...

Air flows to the top of the engine, but still no oil.

I called the engine manufactures back and told them the low down. They are completely baffled. So they have now called the engine engineers. Hopefully I'll hear something from them in the morning.

Meanwhile...does anyone here have any ideas? I've been over this engine so many times. Everything is connected properly, everything should be workings. I'm just not seeing oil circulate up to the valve springs. Please help me.
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Old 05-03-2006, 09:56 AM   #3
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Did you run it with out one valve cover on so you can see better.
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Old 05-03-2006, 11:27 AM   #4
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A very good bet would be that the cam bearings were installed incorrectly. If their holes don't line up correctly, it cuts off lubrication to the top end. Is there any lubrication to the top end?

If you have oil pressure at the bottom end and at the camshaft (and you do, or the engine would have failed catastrophically by now) I'd say that'* what they're going to find out.

I'd try their power primer deal (never heard of one) before pulling it back out, though.
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Old 05-04-2006, 10:20 AM   #5
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Daman-It has been run several times with the valve covers off so we could keep some lube on the top end.

Bob Dillon-I know that the cam bearings need to line up exactly for oil to flow through the holes. I am getting a little oil flow to the top. But no where near what it should be.

The engine was dyno tested from the manufacturer. So according to them, if it passed their dyno test, then all engine specs were met (i.e. oil pressure)

But how do they test the oil pressure? Via the sending unit? If you'll remember earlier; i said pressure is getting to the sending unit, as the gauge still reads ~40psi.

Any insight?
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Old 05-04-2006, 10:25 AM   #6
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This just in!!!

The engine engineers are stumped and are sending me a new engine. They can figure out whats wrong with it on their own time. It should be here today or tomorrow. I'll be sure to keep this updated. Thanks for everyone'* help.

Hopefully come this weekend or monday; I'll be cruising again.

As Always,

-IKZ
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Old 05-04-2006, 10:38 AM   #7
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Cool.......make shure you check the new one!!!!!!
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Old 05-05-2006, 02:15 PM   #8
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Are the engineers going to get back with you with what they found? I'd be interested in hearing just for the knowledge gained.
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Old 05-05-2006, 03:37 PM   #9
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This was passed down through the grape vine, and I could only talk briefly.

But it was something like a bad bolt and spring that prevented the engine from priming properly. I'm not too familiar with what they're talking about, but didn't have time to talk to them earlier. I'll get more information later today or tomorrow and keep everyone updated. Thanks again to everyone for their help.

-IKZ
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Old 05-08-2006, 11:36 PM   #10
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I rebuilt my engine,but when I had oil pressue problems, it always it showed on the gauge. I believe it I am not mistaken that the pressue shows before the oil goes thru the oil cooler. I am not sure why you had to replace the motor, but is it possible that you have a clog in the cooler. If so, you may have to reverse pressue in the cooler to force out the clog. Also, from personal experience, when starting my new engine, I had to run it and shut it down 3-4 times before oil came thru heads. And it scare the **** out of me too.
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