Oil pressure gauge benefits Options

[DC_neun_vierzehn]

I've seen a lot of 914 owners incorporate a 911 oil pressure gauge (and aftermarket oil pressure gauges) into their 914 dash. Since oil level and oil pressure are two different things, what is the oil pressure helping a 914 driver monitor or prevent from happening?

I've never owned a car with an oil pressure gauge. The stuff I'm reading on Google is all over the place and I can't find anything specific to 914s.

Thanks in advance for the education.

[emerygt350]

I agree that it really isn't going to help you if there is a problem but it will help you see the problem coming. Oil pressure lights come on way too late to help minimize damage. Oil pressure gives you a sense if something is going on with your engine. I know how much I get when the oil is cool, hot n hot, on the highway cruising at speed etc. If those numbers change I know something is unhappy (low oil is one of the first things it warns me about). The engine temp gauge + the oil pressure can tell you all kinds of valuable things that can keep you from causing damage. Personally I like it there for that reason. Oil temp, oil pressure, and head temp. I think they are critical to stop you from hurting something. But it is sometimes better to just not know...

that said, putting the sender in isn't fun. The threads in the block are unobtanium for a fitting these days.

[Superhawk996]

The threads in the block are unobtanium for a fitting these days.

Not sure what is meant here.

Threads in block are no mystery. M10x1.0 Metric pipe taper.

However, a 1/8" NPT will also work. I know people get mad and say that 1/8" NPT isn't the same as M10 x 1.0 taper. They are correct.

However, are so close as to be interchangeable in a pinch. Sort of like a 19mm socket and a 3/4" socket either will work.

Either way, any decent hose fabrication shop can obtain and build to your specification. The key being the fitting has to be a pipe taper.

[emerygt350]

The threads in the block are unobtanium for a fitting these days.

Not sure what is meant here.

Threads in block are no mystery. M10x1.0 Metric pipe taper.

However, a 1/8" NPT will also work. I know people get mad and say that 1/8" NPT isn't the same as M10 x 1.0 taper. They are correct.

However, are so close as to be interchangeable in a pinch. Sort of like a 19mm socket and a 3/4" socket either will work.

Either way, any decent hose fabrication shop can obtain and build to your specification. The key being the fitting has to be a pipe taper.

When my hose broke I bought a whole selection off amazon (nobody around here, even the shops that specialize in fittings, can get m10x1 pipe thread to 1/8NPT needed to fit a hose). None of the amazon versions were correct. Eventually I sucked it up and forced the closest one I could get and used copper tubing to the sender.

[Superhawk996]

When my hose broke I bought a whole selection off amazon (nobody around here, even the shops that specialize in fittings, can get m10x1 pipe thread to 1/8NPT needed to fit a hose). None of the amazon versions were correct. Eventually I sucked it up and forced the closest one I could get and used copper tubing to the sender.

I think you misunderstood. No adapter needed. Just thread the 1/8" NPT in. Done.

I don't expect folks to take me at face value. It is the internet after all. (IMG:style_emoticons/default/happy11.gif)

Here is a side by side comparison of 1/8" NPT spec obtained from 27th edition Machinery's Handbook vs. DIN 158 spec that I could find on the web. Was actually surprised I couldn't find the Metric Pipe Thread Spec in the Handbook so i used what I could find on the web and actual measurement of VW sender P/n 021 919 081B

You will see the thread forms are the same until you get to the 3rd significant digit. Since pipe taper threads work via interference fit due to the taper, what happens is that you will get a little bit earlier or later engagement when the thread forms (primarily due the Threads per inch differences) are intermixed. However, the liquid tight seal will still be established by the interference fit of the tapers and thread forms.



As noted previously, the thread forms are not exactly the same. However, they are close enough that M10 x 1.0 taper and 1/8" NPT have been intermixed on 914's for decades and many people never even noticed that they had done it.

Metric thread form sources:

https://www.pressol.com/informationen/spezi...in-158/?lang=en

and

https://www.yumpu.com/en/document/read/3032...aryland-metrics