Thread size on FJ80 Oil Sender

[Deathvalleypaul]

Can anyone give me the exact thread size of the Oil pressure sending unit. I am replacing it with an aftermarket guage, and I am unable to find an adapter that fits well enough to seal. I know that I am close, but it must be exact. I have used a thread guage and tried it by running dies over the thread, but cannot get exact enough.

THANKS

 

[half k cruiser]

Isn't it 1/8 or 1/4 BSPT. Pretty sure the difference is only one thread per inch over NPT. Probably hard to find a sender in that size.

 

[Deathvalleypaul]

Neither, that is for sure. That one thread per inch means everything when it comes to sealing the sender. I have just watched 2 to 3 quarts shoot out with and without teflon tape.

I am sure there is an exact answer to this question

 

[half k cruiser]

No i'm pretty sure its BSPT, do a search I know I've seen it before when looking to install an aftermarket oil pressure gauge. You can always get a tap set and run it out to whatever size you want. Probably give you more options that way.

 

[Deathvalleypaul]

So what is BPST - a different type of Metric measurement of thread pitch?

 

[half k cruiser]

british standard pipe thread

 

[VooDooBlu72]

Try looking at Maryland Metrics (http://mdmetric.com/prgde3b.htm). They have all sorts of metric and non-US pieces and parts. I was looking to adapt my FJ40's F engine oil sender and found the same weird thread. It turned out to be BSPT and Maryland Metrics was the only place I ever saw that even listed.

 

[rockrod]

It's 10mm x 1

 

[69rambler]

It is 1/8" BSPT.

You could use a BSP to NPT adapter fitting. They are common. Any commercial fitting vendor will have these in whatever material you want. I typically buy them from McMaster-Carr.

 

[rockrod]

Stop posting if you don't know the answer.

It's 10mm x 1

I went down this road with my engine swap because I wanted to use the original oil pressure sensor that was in my 1fz motor so that the stock gauge would work. I had to buy a tap and surprise, the threads on the sensor are 10mm x 1.

 

[69rambler]

Stop posting if you don't know the answer.

It's 10mm x 1

I went down this road with my engine swap because I wanted to use the original oil pressure sensor that was in my 1fz motor so that the stock gauge would work. I had to buy a tap and surprise, the threads on the sensor are 10mm x 1.

So we're perfectly clear here the threadform used on the oil pressure sending unit on Toyota engines is a tapered pipe threadform. That's how it seals. Straight threadforms require some other form of seal.

M10X1 is not a standard thread. Toyota is pretty good at using DIN standard metric fasteners, they even use standard fastener pitches for Banjo bolts and specialty fluid fittings which is generally considered poor design engineering, but it makes sense from a manufacturing engineering perspective.

1/8 BSPT has a major diameter of 9.40-9.728 MM and a pitch of .907 MM.

You could tap an existing female 1/8" BSP hole to M10X1 if you did not know what you were doing.

To verify I just pulled the oil sender from 1FZ, measured the pitch at .9 MM, the minor diameter at 9.42 MM, took an 1/8" BSPT pipe plug from the hardware stock and threaded it right in to the standard 3.97 MM BSPT gauge length before it snugged up.

I hope this is educational for you.

 

[Deathvalleypaul]

I just hope it seals and keeps the oil from squirting out! I will let you all know, once I get it done without blowing my engine because it will shoot 4 quarts out in less than a second with the wrong size threaded into the sender hole.

 

[Douglas S]

Every single tapered thread on an 80 is BSPT. No exceptions.

 

[9180ltd]

I know it's not a gas engine but on my Toyota 1HD-T diesel it's BSP, and I had no problem getting a "T" fitting so I could run the stock sender and a cross over fitting to run NPT at the first hydraulic shop I stopped at. Cost me about $10.

 

[Deathvalleypaul]

Thank you all for your help. I purchased a 1/8British Standard Pipe Thread adapter to 1/8 National Pipe Thread and it sealed right up. 1/8BSPT to 1/8NPT

 

[Billy Skaggs]

So is the block thread 1/8" npt so the adaptor always you to use a 1/8"bspt sensor. because i found 1/8" npt sensor (pressure) and i want to buy but im trying to figure the block threads.

 

[maxamillion2345]

So we're perfectly clear here the threadform used on the oil pressure sending unit on Toyota engines is a tapered pipe threadform. That's how it seals. Straight threadforms require some other form of seal.

M10X1 is not a standard thread. Toyota is pretty good at using DIN standard metric fasteners, they even use standard fastener pitches for Banjo bolts and specialty fluid fittings which is generally considered poor design engineering, but it makes sense from a manufacturing engineering perspective.

1/8 BSPT has a major diameter of 9.40-9.728 MM and a pitch of .907 MM.

You could tap an existing female 1/8" BSP hole to M10X1 if you did not know what you were doing.

To verify I just pulled the oil sender from 1FZ, measured the pitch at .9 MM, the minor diameter at 9.42 MM, took an 1/8" BSPT pipe plug from the hardware stock and threaded it right in to the standard 3.97 MM BSPT gauge length before it snugged up.

I hope this is educational for you.

SNAP

 

[SoularVibe]

In the form of a question:

? Squirrelly Oil Pressure Sending Unit Adapter 1/8" BSPT Port Male Female T https://www.amazon.com/dp/B00QXK0QSW/?tag=ihco-20

 

[Gabriel 71]

1/8 British pipe thread 28 thread per inch npt 27 cheerio

 

[Skrewball]

This is a very handy kit if you are trying to put aftermarket senders into either a stock 80 engine, or a swapped engine.
Equus 9848.


You can kind of cheat and put a bsp fitting into an npt hole, but it doesn't really work the other way around.