Where is the plug on the block for oil pressure - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 10 (permalink) Old 09-27-2008, 06:02 PM Thread Starter
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Where is the plug on the block for oil pressure

Putting an oil pressure guage in today. Got to looking and found several plugs which on is good to use for oil pressure. Thanks
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post #2 of 10 (permalink) Old 09-27-2008, 06:09 PM
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Re: Where is the plug on the block for oil pressure

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Originally Posted by thedieselkid View Post
Putting an oil pressure guage in today. Got to looking and found several plugs which on is good to use for oil pressure. Thanks

You can use the one on top of the HPOP Res, or down by the oil filter...
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post #3 of 10 (permalink) Old 09-27-2008, 06:13 PM Thread Starter
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Re: Where is the plug on the block for oil pressure

Just curious do you know the thread size so I can go get an adapter before I start. Thanks
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post #4 of 10 (permalink) Old 09-27-2008, 06:28 PM
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Re: Where is the plug on the block for oil pressure

1/8" NPT if you go off the oil filter adapter, this is a better place to pull oil galley pressure from as the HPOP reservoir will sometimes show lower than actual pressure due to the HPOP drawing more than is fed, needle shake is also annoying when using that port.

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post #5 of 10 (permalink) Old 09-27-2008, 06:44 PM
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Re: Where is the plug on the block for oil pressure

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Just curious do you know the thread size so I can go get an adapter before I start. Thanks
As was said: the port by the oil filter is 1/8 npt (pipe thread).

The one on top of the HPOP reservoir is an SAE ORB (o-ring boss) thread, either a -3 or -4 size (pretty sure it's -4).

Also, the port by the filter is right off the pump, before cooling or filter, so it's naturally always going to give a higher reading (no restriction loss through the filter & cooler). The HPOP res location is probably more representative of the actual pressure in the engine, IMO.

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post #6 of 10 (permalink) Old 09-27-2008, 09:50 PM
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Re: Where is the plug on the block for oil pressure

There is one right at the very most part of the block, on the drivers side. It kinda sticks out at you, where the tranny mounts up.

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post #7 of 10 (permalink) Old 09-27-2008, 10:31 PM
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Re: Where is the plug on the block for oil pressure

You're looking for block port - here is the location:

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post #8 of 10 (permalink) Old 09-28-2008, 12:41 AM
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Re: Where is the plug on the block for oil pressure

Ok so there have been what 3 or 4 different locations given for oil pressure ports? Which one is best?

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post #9 of 10 (permalink) Old 09-30-2008, 05:11 PM
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Re: Where is the plug on the block for oil pressure

There is not a "best" location. It simply depends on what you want. If you want a higher, steady reading, use the ports down by the filter. If want a lower (and IMO, a "truer") pressure reading, use the one up on top. There is no "good" or "bad", just different based on where it is, and what's easiest for you. It's all the same oil...

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post #10 of 10 (permalink) Old 09-30-2008, 08:18 PM
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Re: Where is the plug on the block for oil pressure

I want to see the pressure at the main/rod bearings.

If there is no oil pressure up top, the injectors won't fire.

I used the rear most port on the block. 50 psi cruising down the road at 1950 rpm.

Marc

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