LT1-LT4 Modifications 1993-97 Gen II Small Block V8

OMG!! What just happened?

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Old 08-08-2011, 12:27 PM
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Default OMG!! What just happened?

Okay guys! Need help! Car has been down for a while for a few reasons. Anyway been driving it for a couple weeks now and today it was running really good. Thought I would see what she would do for the first time since it was down.

Dropped it in low and did a burn out. I started rolling it out and it runn up to the 6 grand mark and wouldnt shift. I let off and got back in it. Then it stalled. I got it started back pretty easy, but oil pressure went to near 0 at idle and on the short drive home only got up to around 5 psi off idle. Before it was health psi. Also oil only has around 10 miles on it.

I also noticed a little knocking ticking noise.

Did I spin a main?
Old 08-08-2011, 12:31 PM
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If the car still runs (to an extent) then you likely do not have a catastrophic failure, but the oil pump drive arm either broke and popped off or stripped out. Time to remove the intake manifold and see what's up.
Old 08-08-2011, 01:15 PM
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Maybe the oil pickup fell off? I would not run untill you figure this out or you will spin something
Old 08-08-2011, 02:32 PM
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Don't worry it will not leave my drive until I have pressure again!

So what exactly am I looking for in the oil valley?
Old 08-08-2011, 02:33 PM
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The oil pickup is on the oil pump right? So can I get the oil pan off with the motor in place?
Old 08-08-2011, 02:40 PM
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Originally Posted by jrock692
The oil pickup is on the oil pump right? So can I get the oil pan off with the motor in place?
I would suspect the oil pump driveshaft far before the pickup. If the pickup fell off as long as the pump is still submerged you'll have good oil pressure. Pull off the intake manifold first and pull the oil pump drive. It's held down by a small bolt at the back of the lifter valley.
Old 08-08-2011, 02:56 PM
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Man I truely value your opinion, you have helped me alot in the past. Thanks.

Can u give me an idea of how the oiling system is drive or works. I see on shoebox that the stock drive uses a plastic coupling so that sounds very probable.
Old 08-08-2011, 03:08 PM
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Originally Posted by jrock692
Man I truely value your opinion, you have helped me alot in the past. Thanks.

Can u give me an idea of how the oiling system is drive or works. I see on shoebox that the stock drive uses a plastic coupling so that sounds very probable.
Once you have the manifold off you'll see the stub drive in the back. It's held down by a single bolt (10mm IIRC). Remove the bolt and pull out the drive gear and inspect it. It will be obvious if it's chewed up. You'll also want to check to make sure the plastic arm (where the bolt holds down the assembly) isn't cracked or broken.

The gear engages the drive which engages the oil pump driveshaft which in turn spins the oil pump. There seems to be a rash of oil pump drive gear failure recently for some reason. Hopefully that's your case and the CHEAPEST fix for a no oil pressure situation.
Old 08-08-2011, 03:14 PM
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Great info thanks again.
Old 08-08-2011, 03:48 PM
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Originally Posted by RamAir95TA
If the car still runs (to an extent) then you likely do not have a catastrophic failure, but the oil pump drive arm either broke and popped off or stripped out. Time to remove the intake manifold and see what's up.
My car ran and was drivable (aside from the noise, and being down on power) with 2 main bearings spun.

Not trying to contradict you or crush this guy's hope, just saying... He should certainly take a look at the oil for metal.
Old 08-08-2011, 07:23 PM
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The same thing happened to me, I was at the end of the track @ 6100ish and oil pressure went to 0psi. I drove the car home and didn’t make any noise, its spun two mains and 4 rods. Does the check gauges light come on when leaving from a stop?
Old 08-08-2011, 07:34 PM
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Mine is making a clacking sound. Sounds kinda like a lifter? And as for the light. Well it is on and off all the time anyway! Lol yes I have other issues too.
Old 08-08-2011, 09:01 PM
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I am going to put a guess into a rod/main bearing(s).



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