Sending units?

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General Sherman

General Sherman

Joined
Oct 17, 2005
Threads
79
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442
Location
Placerville, CA
Who knows the correct size and thread pitch for the Oil Preasure and Water Temp sending units on a 2F. Just to clarify i'm looking for the size of the hole on the block not the sending units themselves
Thanks
N
 
Water is 1/2" npt. Oil is metric, but very, very close to 1/8th npt.

You planning a 2F swap into your rock rig before Dusy?

;p
 
Thanks Mark

I new yould come through with the info.

No 2f in the General...Got to used to 350 horsey's. Put an Orion HD in Dave Thomas's Truck and that led to Guages(speedo VSS) Puting the finishing touchs on the Autometer's

Please don't remind me about the Dusi. I hate missing it---were just so busy i can't get away. The city of Vacaville is buying our building and forcing us to move---Sucks, but what are you going to do. We just roll with it and hope for the best.
God provides
Thanks again
Neil
 
1/8-28 Bspt

Oil sending unit is 1/8 -28 BSPT(British Standard Pipe Tapered).
(On F engines the tapped holes where the oil lines go into the regulator housing and the block are also 1/8-28 BSPT)

I have researched this a bit and thought some folks might find the following information useful for future reference.

There are 3 features that are different between a 1/8 BSPT thread and a 1/8 NPT thread.

BSPT has a 55 degree included angle thread,compared to 60 degrees for NPT, rounded crest and root radius and a different number of threads per inch.

AUTO METER part # 2269 is a 1/8" NPT Female to 1/8" BSPT Male adapter and will allow the use of 1/8-27 NPT sending units.

If you need to make a hole for this thread the Tap drill for this is a 8.4mm or a 21/64.

1/8-28 BSPT Taps are available from the following places: Be warned! They are not cheap... :eek:

http://www.tapdie.com/html/bspt__taps.html
http://www.goliathinternational.com/categorypage.php?cat=1&sub=BSP
http://www.enco.co.nz/ViewSubCategory.aspx?id=IMT&catid=TPS&gpid=CT
http://www.amazon.com/Value-8-28-Bs...8&m=A3GWFGDE3FDRVJ&s=hi&qid=1189173533&sr=1-5
http://www.ppe.com/pdf07/0888.pdf


Hope this helps someone else!
 
1/8" NPT has always threaded into the block for me..

May not be perfect, but hell it is a tapered thread..
 
If you are looking for a plug, I believe that the Oil Pressure sender is the same BSPT as the small manifold plugs which are available for a couple bucks at SOR. I can't swear to it though.
 
65swb45 said:
Water is 1/2" npt. Oil is metric, but very, very close to 1/8th npt.

You planning a 2F swap into your rock rig before Dusy?

;p
Click to expand...

All the pipe threads on 2F engines are BSPT, Toyota never used NPT on the 2F. On my '78 the adapter that the temp sender is mounted in is metric straight thread with a taper seal. If you do a search, this has been discussed at length. And yes, you can force a NPT sensor in till it seals. That does not make it the correct fitting.
 
"AUTO METER part # 2269 is a 1/8" NPT Female to 1/8" BSPT Male adapter and will allow the use of 1/8-27 NPT sending units.

If you need to make a hole for this thread the Tap drill for this is a 8.4mm or a 21/64.

1/8-28 BSPT Taps are available from the following places: Be warned! They are not cheap... :eek:"


so do i need to buy AUTO METER part #2269 if i just want to make the existing hole fit the elbow from the extended oil lines kit (from JT)? I only need the AUTO METER part #2269 for the 1/8-27 NPT sending unit, correct?
 
If you have an oil pressure regulator you will need two #2269 adapters, one for the engine block to oil filter housing return oil line and one for the oil pressure regulator output to oil filter housing line.

One adapter threads into the block then the elbow on the extended line threads into the adapter.

The other adapter threads into the end of the oil pressure regulator then the elbow on the other extended line threads into the adapter.
 
2/40's said:
"1/8-28 BSPT Taps are available from the following places: Be warned! They are not cheap... :eek:"
Click to expand...

They are available at mscdirect.com for $39
 
bsevans said:
And yes, you can force a NPT sensor in till it seals. That does not make it the correct fitting.
Click to expand...


NPT are basicly a force fit thread any way. who cares if it works???
 
Mace said:
NPT are basicly a force fit thread any way. who cares if it works???
Click to expand...


Hee, hee, hee................................;)
 
BTW, what is the thread pattern of the stock sender?

I have to make an adapter for my 5.0..

I HATE it when the stock gauges do not function..
 
Mace said:
NPT are basicly a force fit thread any way. who cares if it works???
Click to expand...

To each his on. That's why, at 61, I still twist my own wrenches.
 
Coolerman said:
No they are not the same. Read this: http://en.wikipedia.org/wiki/British_Standard_Whitworth
Click to expand...

The Whitworth 55° angle remains commonly used today worldwide in form of the 15 British Standard Pipe threads defined in ISO 7, which are commonly used in water supply, cooling, pneumatics, and hydraulic systems. These threads are designated by a number between 1/16 and 6 that originates from the nominal inner inch-diameter of a steel pipe for which these threads were designed. These pipe thread designations do not refer to any thread diameter.
Click to expand...

Am I missing something? From this paragraph, it sounds like they are.

XZ5T4Jp.gif



p = pitch of the thread
d = depth of the thread
r = radius at the top and bottom of the threads
then:
d = 0.640327 p r = 0.137329 p

1ohT7dd.gif



BSP (British Standard Pipe Thread) Profile

r = Basic Radius = 0.137329 p
h = Basic Depth of Thread = 0.640327 p
p = Pitch = 1/t.p.i.
Angle of Thread = 55o Degrees.


According to the interweb invented by hte fine and dandy ex-VP they certainly appear to have the same radius and depth and based on the angle the pitch would have to be the same, right?.Whether or not they come in the same sizes I do not know.

If this is true it widens our selection of fittings for many applications. (and lessens the expense)
 
Last edited:
First off, I stand corrected. After further research it appears the Whitworth (BSW) thread specs are the same as the BSPP (British Standard Pipe). The BSPT (British Standard Tapered) fittings WILL fit the BSPP fittings.

Using this site: http://www.royalbrassandhose.com/catpdf/RBH Thread and Hose Identification 485-502.pdf I found the following:

The Japanese tapered pipe thread connector is identical to and
fully interchangeable with the BSPT (tapered) connector. The
Japanese connector does not have a 30° Flare, and will not
mate with the BSPP female.
The threads conform to JIS B 0203, which are the same as
BSPT threads.
The seal on the Japanese tapered pipe thread connector is
made on the threads.

This brings up the question of what the FJ40 BLOCK is tapped for BSPT or BSPP?
From looking at it it looks like BSPP. Still researching some things... :D
 
Coolerman said:
First off, I stand corrected. After further research it appears the Whitworth (BSW) thread specs are the same as the BSPP (British Standard Pipe). The BSPT (British Standard Tapered) fittings WILL fit the BSPP fittings.

Using this site: http://www.royalbrassandhose.com/catpdf/RBH Thread and Hose Identification 485-502.pdf I found the following:

The Japanese tapered pipe thread connector is identical to and
fully interchangeable with the BSPT (tapered) connector. The
Japanese connector does not have a 30° Flare, and will not
mate with the BSPP female.
The threads conform to JIS B 0203, which are the same as
BSPT threads.
The seal on the Japanese tapered pipe thread connector is
made on the threads.

This brings up the question of what the FJ40 BLOCK is tapped for BSPT or BSPP?
From looking at it it looks like BSPP. Still researching some things... :D
Click to expand...
It sounds as though it would not matter though, right...I mean, it appears all three are the same which is great (or at least better) for aftermarket replacement as the pipe thread is all over the place where as the BSW is hard to find. An adapted can be purchased to mate to NPT or flare allowing the use of such things a Jegs fuel line. Handy for the fuel tank and carb.
 
Hugh Heifer said:
It sounds as though it would not matter though, right...I mean, it appears all three are the same which is great (or at least better) for aftermarket replacement as the pipe thread is all over the place where as the BSW is hard to find. An adapted can be purchased to mate to NPT or flare allowing the use of such things a Jegs fuel line. Handy for the fuel tank and carb.
Click to expand...

Exactly. I have not even begun to address the Japanese fuel line fittligs. :D
 
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