LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Inside the Oil Pan? Some Kinda Catch Tray?

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Old Jan 10, 2004 | 03:25 AM
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Inside the Oil Pan? Some Kinda Catch Tray?

OK Im trying to figure out my HIGH RPM oil pressure problem that i've been having as described in THIS THREAD...

When I pulled the pan to check the pickup clearance I noticed some weird tray that is underneath the tray that bolted ON to the pan itself.. NOT the windage tray that hangs from the main cap bolts (which I actually don't have anymore) but this tray is welded to the pan itself...

You can see what Im talking about HERE You can see in the red there what Im talking about... That lil tray like sits UNDER the upper tray but for some reason it has made itself loose... I can push it under so that the tray isn't even visible like its supposed to be I would imagine, but it's still loose... ANyone know what this does?

Could this be causing my oil pressure problem I've been having when Im at like 3k and the floor it and the pressure starts to go the opposite direction?

thanks
Old Jan 10, 2004 | 08:35 AM
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The baffle in my stock pan looks a bit different than that one. At any rate, it should not be moving around.
Old Jan 10, 2004 | 03:45 PM
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Originally posted by shoebox
The baffle in my stock pan looks a bit different than that one. At any rate, it should not be moving around.
Really, what does yours look like...

See that little tray that I have circled in red is SUPPOSED to be UNDER the other tray in there. I just have it pulled forward so people can see what Im talking about... I wouldn't even be able to pull it forward if it was welded in place like its supposed to...

You know what the tray does Rob? Im just trying to figure out if this is my prob..
Old Jan 10, 2004 | 06:36 PM
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While your waiting for Rob to answer you, I thought I would jump in with what I had said before and I won't say another word.

You said you have a problem at high rpm with decreased oil pressure. You also said that you didn't think the oil was sloshing backwards since you were at a decent speed when you jumped on it and still had the problem. I agree, although you could try a pan with a trap door baffle like I have from Steff's. Very nice piece.

I personally think you have a cavitation problem. As you know I mentioned it before. There is not many folks that understand hydraulics or fluid flow. I do not profess to be a scholar in the field either. But in some of the pumps I deal with, I know what cavitation is and I know that some in the engine profession deal with this by preventing it from being an issue.

What I suggested to you before was to chamfer the hole in the rear main cap where the oil enters from the pump. If you look at the cap with the pump removed you will see 2 holes. One where the bolt goes in that holds the pump to the cap and the other where oil passes into the cap from the pump. This oil passage has square shoulders and many pros, Nu-tek being one of them, rounds the shoulders and smooths the cap out so the oil does not get turbulent.

The process is easy to do if you have the pump off with simple dremel type tools. I highly think it is worth the small amount of trouble and think you should talk to someone about your concerns like the folks at Nu-tek.

I won't bother you with my opinion any further. The best of luck to you.
Old Jan 10, 2004 | 06:53 PM
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Originally posted by slopokrodrigez
While your waiting for Rob to answer you, I thought I would jump in with what I had said before and I won't say another word.

You said you have a problem at high rpm with decreased oil pressure. You also said that you didn't think the oil was sloshing backwards since you were at a decent speed when you jumped on it and still had the problem. I agree, although you could try a pan with a trap door baffle like I have from Steff's. Very nice piece.

I personally think you have a cavitation problem. As you know I mentioned it before. There is not many folks that understand hydraulics or fluid flow. I do not profess to be a scholar in the field either. But in some of the pumps I deal with, I know what cavitation is and I know that some in the engine profession deal with this by preventing it from being an issue.

What I suggested to you before was to chamfer the hole in the rear main cap where the oil enters from the pump. If you look at the cap with the pump removed you will see 2 holes. One where the bolt goes in that holds the pump to the cap and the other where oil passes into the cap from the pump. This oil passage has square shoulders and many pros, Nu-tek being one of them, rounds the shoulders and smooths the cap out so the oil does not get turbulent.

The process is easy to do if you have the pump off with simple dremel type tools. I highly think it is worth the small amount of trouble and think you should talk to someone about your concerns like the folks at Nu-tek.

I won't bother you with my opinion any further. The best of luck to you.
LOL dude your not bothering me by all means

Have you read up on my progress in the FIRST THREAD?? I will prolly be more than likely pulling the pan back off again... One thing Im noticing now after redoing the pickup is that at high RPM's the psi isn't coming down NEAR AS MUCH as it did before.. So Im sure that the pickup as prolly put on a little high the first time. But now Im not sure what the prob is.. It's prolly a mix of everything, No windage tray, oil sloshing around etc.. I just don't know if I should just get a bigger pan, a windage tray or what... This is all really aggrivating
Old Jan 10, 2004 | 07:04 PM
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This is what mine looks like. Under the flat piece, there is a piece of metal that slopes toward the front of the pan and keeps oil from sloshing to the front (you can see it with some numbers stamped on it).
Old Jan 10, 2004 | 08:42 PM
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Originally posted by shoebox
This is what mine looks like. Under the flat piece, there is a piece of metal that slopes toward the front of the pan and keeps oil from sloshing to the front (you can see it with some numbers stamped on it).
Yea that's it, I have the same thing, except I have my pulled OUT on one side as you can see in MY PIC.

So you say it's to keep oil from sloshing to the front? Hmm I dunno if that would still be causing the problem Im having
Old Jan 10, 2004 | 09:21 PM
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Oh, I think I see, now. Your circle obscured part of the upper part and I was a little confused.
So, it looks like the part underneath is what is loose, eh? I would say that part keeps oil from sloshing forward under hard braking. Perhaps with it being loose or out of place, it is keeping oil from draining back to the pump properly? At any rate, it should be fixed and IMO have that windage tray back on the main cap studs.
Old Jan 10, 2004 | 11:05 PM
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Like shoe box said I would definately have the windage tray on and I read your other post and I wouldn't set the oil pump pick-up any higher than .375 off the bottom of the pan or closer than .275. Mine is set at .300 and haven't had any pressure problems , I am using the stock pan with windage tray and a blueprinted speed pro pump
Old Jan 10, 2004 | 11:39 PM
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Originally posted by shoebox
Oh, I think I see, now. Your circle obscured part of the upper part and I was a little confused.
So, it looks like the part underneath is what is loose, eh? I would say that part keeps oil from sloshing forward under hard braking. Perhaps with it being loose or out of place, it is keeping oil from draining back to the pump properly? At any rate, it should be fixed and IMO have that windage tray back on the main cap studs.
lol yea now after looking at my pic again I can see where you would be confused.. Yes the red circle is blocking your view of the tray etc.. I wish I could get the tray back in there but it won't fit with my stroke Im looking into some aftermarket ones right now but am still undecided...
Old Jan 10, 2004 | 11:43 PM
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im pretty sure that that tray is supposed to keep the oil pump from staving of oil as your driving, it keeps oil close to the pick-up, it could be you problem if its directing oil away from the pick-up, i would fix it and see if that helps...but thats just my opinion
Old Jan 10, 2004 | 11:52 PM
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Originally posted by z28s
im pretty sure that that tray is supposed to keep the oil pump from staving of oil as your driving, it keeps oil close to the pick-up, it could be you problem if its directing oil away from the pick-up, i would fix it and see if that helps...but thats just my opinion
WERD, yea Ill prolly put a new stock pan in this week and see if that changes anything... I Hope it does
Old Jan 11, 2004 | 08:16 AM
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Just an opinion but the ways in which your using the car (I believe you said low 10's to high 9's) Doesn't really work with a stock oil pan. For extra protection, I would recommend one with a trap door baffle.

Just something to think about.
Old Jan 11, 2004 | 03:30 PM
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Originally posted by slopokrodrigez
Just an opinion but the ways in which your using the car (I believe you said low 10's to high 9's) Doesn't really work with a stock oil pan. For extra protection, I would recommend one with a trap door baffle.

Just something to think about.
Yea I know, I just hate spending money on things that won't give me anymore power But I mean if it's something that I know will cure this problem them Im all about it
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