RB25 Oil pressure gauge question! - Nissan 240SX Forums
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#1 Old 06-30-2008, 01:08 AM
 
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RB25 Oil pressure gauge question!

So I've just acquired a decent S14 with a S2 RB25DET. I love it!

I'm in the process of adding a few little things to monitor it, until I can pull the RB and rebuild it!

Anyhow, I'm unable to get under the car for the time being, so I need to know what I'd need to install an oil pressure gauge.

It will be electric, no mech gauges for me! I believe the threads on the block are 1/8 BNPT, correct?

I don't think theres anything out-of-the-ordinary with the oil system on this engine. No oil cooler or spacer or anything like that. So can I just get the proper adapter and thread it in place of the stock sending unit?
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#2 Old 06-30-2008, 01:46 AM
 
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The gauges usually come with the installation directions. I bought an oil pressure sensor from Megan and never hooked it up, but I recall having the manual in the box. BTW - I'm selling that unit if you're interested. =)

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#3 Old 06-30-2008, 01:55 AM
 
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The gauges usually come with the installation directions. I bought an oil pressure sensor from Megan and never hooked it up, but I recall having the manual in the box. BTW - I'm selling that unit if you're interested. =)
Well, I already know what it takes to hook one up, I just need to know what exactly needs to be installed on the block....ie: thread size of oil pressure sending unit.

Thanks.
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#4 Old 06-30-2008, 01:56 AM
 
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I don't know that answer. =(

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#5 Old 06-30-2008, 03:48 PM
 
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you should get a sandwich adapter so the oem oil pressure light works as well. then you can take it to autozone, find what thread it is and be done with it.

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#6 Old 06-30-2008, 05:51 PM
 
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you should get a sandwich adapter so the oem oil pressure light works as well. then you can take it to autozone, find what thread it is and be done with it.
That's kinda my last resort....I don't like sandwich adapters, seems they can mess with pressure. Then again, it'll be more reliable than a brass fitting threaded into the block, holding the sending unit/stock sensor.
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#7 Old 06-30-2008, 08:46 PM
 
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I will probably be installing mine on Thursday afterall. If I learn anything I'll let you know.

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#8 Old 07-03-2008, 06:10 PM
 
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I decided to go with a sandwich adapter too. Hopefully everything will work out.

RB25's use the same size oil fiilter as the stock KA dont they? Isn't it 3/4-16 thread?
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#9 Old 07-05-2008, 05:58 PM
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correct

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#10 Old 07-06-2008, 12:37 AM
 
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#11 Old 07-20-2008, 09:18 PM
 
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Ok, I went with the sandwich adapter, got everything installed....no leaks!

However, my gauge isn't working. It's a run-of-the-mill Autometer elec.pressure gauge and the needle never moves.

Got everything wired according to the basic instructions, but no go. The gauge is getting power, and it's grounded properly, so I'm left assuming the sender or gauge is bad.

Anyone know a way to test either out?
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#12 Old 06-18-2010, 07:31 PM
 
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You could always jsut take the gauge back and say that it doesnt work. try another one out. or you could borrow someones gauge and check it out.

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#13 Old 04-17-2013, 12:22 PM
 
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Oil Take Off - Dual Outlet there you guys go


has anyone purchased one of these before??


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#14 Old 06-04-2013, 12:09 PM
 
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This is another option, Autometer makes a metric adapter for the sender:

Auto Meter

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#15 Old 06-18-2013, 07:22 PM
 
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you need a bspt port that goes to the block.


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