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Post Info TOPIC: LS/LQ oil pan cooler ports?



- Mike -
Olalla, Wa


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LS/LQ oil pan cooler ports?
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I’ve searched for hours and maybe I’m just not using the correct terms, but I cannot figure out of the two ports used for the factory oil cooler, which is inlet or pressure port? 

I have a Mast Motorsports pan (owned and produced by Holley now) and it comes with -10an plugs in these ports. There is no provision for the common two bolt adapter. I’m wanting to drill and tap a plug for a mechanical gauge, but which plug?



-- Edited by 66SSFan on Monday 23rd of October 2017 09:16:37 AM

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- Beemer Brett - Redmond, WA

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I guess you could try both. Pretty sure the forward one is the out, with the rear being return. I used port at top of valley behind intake.

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- Erik -
Snohomish, WA


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Forward hole is the outlet, rear hole is the return.

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'69 Chevelle Sport Coupe, EFI355, TH350
'68 Chevrolet C10 Stepside Project, 292, t-56, C4 IRS (project)
'77 Chevrolet K20 Silverado LWB, 400CI, TH400
'91 Chevrolet V3500, TBI Gen V 454, 4L80E, Lifted



- Mike -
Olalla, Wa


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Since they are blocked, I need to drill and tap the rear return plug then, right?

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'66 SS Chevelle LQ4/4L80E

'65 Malibu SS (Best of 10.86 @ 125mph 1.51 60')

'65 GTO 455/th400




- Erik -
Snohomish, WA


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Most aftermarket adapters have a gauge port on the outlet side of the adapter, but some have ports on both the outlet and inlet. If you are not flowing oil through an adapter, then I would think you would want to use the outlet side for your gauge, but I am not certain.

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Erik
'69 Chevelle Sport Coupe, EFI355, TH350
'68 Chevrolet C10 Stepside Project, 292, t-56, C4 IRS (project)
'77 Chevrolet K20 Silverado LWB, 400CI, TH400
'91 Chevrolet V3500, TBI Gen V 454, 4L80E, Lifted



- Mike -
Olalla, Wa


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Posts: 3616
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That’s my confusion, if it’s blocked, there is no flow. The outlet wouldn’t see any pressure?

__________________

http://www.u11racing.com

'66 SS Chevelle LQ4/4L80E

'65 Malibu SS (Best of 10.86 @ 125mph 1.51 60')

'65 GTO 455/th400



- Beemer Brett - Redmond, WA

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I agree, I think should be on outlet. There is still pressure, just no flow. Oil trying to flow at the outlet, but can't, hence the pressure. think about your tires for example, there is no flow at the valve but still pressure there.

Any reason you don't like the location at back of valley on top?  I can look for a picture of mine when I'm back to my computer. If I recall correctly the computer doesn't look for oil pressure so that location can be used for stand alone gauge. 



-- Edited by Brettd85 on Tuesday 24th of October 2017 07:36:59 PM

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- Mike -
Olalla, Wa


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That’s a possibility since the computer isn’t using that. There must be a fitting that can be used for the mechanical gauge instead of the electronic sender that’s there now.

__________________

http://www.u11racing.com

'66 SS Chevelle LQ4/4L80E

'65 Malibu SS (Best of 10.86 @ 125mph 1.51 60')

'65 GTO 455/th400



- Beemer Brett - Redmond, WA

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Yes, I just don't remember the threads. I had to use adapters for my electrical sender. I got them all from summit. Heres a pic:




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1966 Chevelle, 1972 K20, 1967 GTO, 1955 210 Coupe, 1969 Chevelle

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