I have continued to have trouble finding the right thread for the VG block. I originally had a mechanical guage and was able to run the line by using a barbed fitting which was just a tad small so it fit fine with lots of teflon tape. However, I've now ordered an electronic guage from Autometer and expected the sensor unit would be the right size to fit. But, it is just a tad too big and will not thread in. The Automoeter sensor came with a 1/4 adaptor which it screws into perfectly, of course. The stock Nissan sensor/sending unit will fit just a bit loosely into the adaptor, but with some teflon would fit fine.

Long story short, What is the size and thread of the oil sensor port off the block? This way, I can purchase an adaptor for it and get things hooked up! I know others have connected guages and would like to know what others have done to resolve this issue. I'm assuming my issue is not thread so much as size...SAE versus Metric. Thanks!

Chris

 

It may be this one http://www.stealthmodeperformance.co...blockfit.shtml This is what I used on mine, I would imagine it would be the same threads for the vg.

 

I don't think that will work either. That adaptor uses 1/8 thread. The Autometer sensor is 1/8 size too and is just too big to not begin threading.

I should have been more clear about the sizes. What I failed to communicate previously is that the sensor is 1/8 size. The adaptor it comes with enlarges it to 1/4. The threads it screws into on the adaptor is naturally 1/8 female. The stock Nissan sensor will screw somewhat loosely into the 1/8 female adaptor....with some teflon tape it would probably be fine. So, what this tells me is that the female opening on the block is either an SAE size smaller (which I don't think it is) or that the block opening is the metric size just below 1/8.

I know I'm using an old "A" block, but I've got an '89 and '92 "W" blocks which have the same opening for the oil sensor.

If I can't find anything, I guess I may be left to tapping the block for 1/8.

 

Maybe it's the one on this page. http://www.z31parts.com/engineparts.html

 

I do believe so! It still does not state what size the block thread is. Is this a safe place to order from? Never done business with them. Thanks!

 

Im pretty sure its 12x1.25

Thats what the oil feed hole in on the Z31 VG30ET is.

 

Whatever size it is, I bought the adaptor off the Z31parts site. Not installed it yet, but matched it up and it appears to be exactly what I needed. Owner of z31parts got it shipped out fast $12 shipped. Worth it to save me all that time and running to find what I needed locally, if it even exists locally.

Really just wanted to inform others about my positive experience with z31parts!

 

it's 1/8 BSPT

 

On my VE and KA engines, I've just put a thin layer of teflon tape on the autometer sending unit and it screwed right in. It wasn't easy to get started (have to hold it at the *perfect* angle), but once I got it started, it threaded right in. it's been in there for 3 years now and hasn't leaked a drop.

 

Danny: The sender is 1/8, but the block size is smaller.
Matt: Autometer sender was too large at 1/8 size. I messed trying to thread it for more than an hour, even tried on two other VG blocks I have sitting around in my garage and it would not even begin to thread.

I know I'm not the brightest bulb in the box, but surely I've not missed something threading a round sensor into a round hole? :-)

A further update, I have since installed the adaptor. The autometer sensor screwed in perfectly. The adaptor screwed in a bit tight....however, I'm certain this is ONLY due to the fact I've already buggered up the block threads on a prior attempt to install an adaptor I thought would work (wrong thread pattern). I taped the fire out of the adaptor and will monitor for leaks when the car is back running. If it should leak, I will remove and rethread both the adaptor and block.

Thanks for all the input!

 

i'm 99% sure i used 1/8 BSPT to the block. then i have a T that's shared w/ the gauge and the factory light.

 

Nissan uses BSPT but gauges come in NPT.

 

NPT= National Pipe Thread.

What the frag is BSPT? British Standard? Bull Sh!$ Pipe Thread?

I hate plumbing! Urgh! I never learned this crap...my bad. Looks like I'm in for a crash course and better do some reading.

Thanks guys!

 

http://tinyurl.com/cdph2f

 

VE i took off the oil filter bracket and re tapped the hole for oil psi, by far the best imo.. it was jus for oil psi gauge also,

it was a autometer

 

I just screwed the autometer gauge in. *shrug*

 

I remeber it was a pita to find and it was something odd. wish i could help but its just been so long ago!