what is the thread pitch of the ECT sender on a gsr engine? is it 1/8" BSPT like the oil pressure switch? reason i ask is because im going to install a water temp guage and im gonna replace the stock sender with the one for the guage. thanks.

 

bump

 

bump, does no one know?

 

Easiest thing to do is go buy a thread gauge,
McMaster-Carr.com should have them, thats where I buy most of my measuring tools and stuff for my machine shop from them.

 

thread guage? please explain. and im not gonna buy a guage if someone knows the answer, and i know somoene does.

im 80% sure its 1/8 BSPT but i want to be sure.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GSRCRXsi &raquo;</TD></TR><TR><TD CLASS="quote">thread guage? please explain. and im not gonna buy a guage if someone knows the answer, and i know somoene does.

im 80% sure its 1/8 BSPT but i want to be sure.</TD></TR></TABLE>


what you COULD do is bring the ECT sender down to napa, they have a board with holes and bolts and ****, and they can match it up. They try to screw the bolt or in your case the sender in those holes, till they find one that matches.


EDIT, If I remember right, all bolts on an honda are .25 thread pitch.

 

well all the bolts arent that pitch.

but a thread pitch in tems of bolt size and thread pitch is not what im talking about here. these are pipe fittings and are categorized differently.

BSPT is British Standard Pipe Tapered
NPT is National Pipe Tapered

the threads are tapered and not straight, meaning that the threads are actually in a conical shape.

the size designation is the size of the ID of the pipe.

so i need this kind of thread classification. just like how the oil pressure switch is 1/8" BSPT. i need to know if the ECT sender is the same or not. like i said, im 80% sure it is, but i want to be 100% sure

 

F-it...go to home depot, grab a handfull of NPT pipe fittings that are near to the size you need and just test it out.

And the gauges are cheap...similar to a feeler gauge (design wize) but with teeth cut into it so you can match it up to the threads.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GSRCRXsi &raquo;</TD></TR><TR><TD CLASS="quote">well all the bolts arent that pitch.

but a thread pitch in tems of bolt size and thread pitch is not what im talking about here. these are pipe fittings and are categorized differently.

BSPT is British Standard Pipe Tapered
NPT is National Pipe Tapered

the threads are tapered and not straight, meaning that the threads are actually in a conical shape.

the size designation is the size of the ID of the pipe.

so i need this kind of thread classification. just like how the oil pressure switch is 1/8" BSPT. i need to know if the ECT sender is the same or not. like i said, im 80% sure it is, but i want to be 100% sure</TD></TR></TABLE>


let me check my helms really quick.

Im not to sure, but are all b-blocks\heads about the same? like I can put my b16 sender in your GSR?
EDIT

are you talking about the small sender, thats in the head, below the DIZZY?

 

yes thats what im talking about. and i already checked the helms. it doesnt say the right pipe fitting size.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Newark Built Kandy SiC-RX &raquo;</TD></TR><TR><TD CLASS="quote">F-it...go to home depot, grab a handfull of NPT pipe fittings that are near to the size you need and just test it out.

And the gauges are cheap...similar to a feeler gauge (design wize) but with teeth cut into it so you can match it up to the threads.</TD></TR></TABLE>

in all likelyhood, the threads will be BSPT since everything else on the car is metric. NPT isnt compatible with BSPT. it MAY work, but i wouldnt trust something like that, and i prefer to do things the right way.

 

If your factory ECT isnt installed vtec wouldnt engage right? cause vtec engages when the engine is up to temp?

Im new to vtec, so excuse me if im spouting wrong ****.

 

thats true but im not removing the ECT sensor. im removing the ECT sender. the sender is for the guage only and is simply just a thermistor. the ECT sensor is for the ecu and i wont be touching it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GSRCRXsi &raquo;</TD></TR><TR><TD CLASS="quote">thats true but im not removing the ECT sensor. im removing the ECT sender. the sender is for the guage only and is simply just a thermistor. the ECT sensor is for the ecu and i wont be touching it.</TD></TR></TABLE>


Im sure you know more about b's then I do, but I was under the impression, theres only 1 sensor\sender to monitor the temp of the motor.

If you remove\unhook that wire. Where is the motor to get its temp reading from?

not from the coolent temp switch. Thats just a thermal switch. to turn the radiator fans on and off, and thats on the back of the block by the Oil filter.

from what I remmber when I was looking at getting water temp guage, you have to kinda T into the hole and keep your exsiting sender, to retain vtec.

I have a mechinical Water temp guage, I got one cause my ECT swtich went bad. and I had to make sure that the temp on my cluster wasnt reading wrong.

https://honda-tech.com/zerothread?id=1230480
https://honda-tech.com/zerothread?id=1232567

 

well reading in my helms, the wiring diagram shows the sender under the dizzy as soley for the guage in the guage cluster. as the sender is just a thermistor.

and the ECT signal for the ecu comes from the ECT sensor behind the head right near the thermostat.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GSRCRXsi &raquo;</TD></TR><TR><TD CLASS="quote">well reading in my helms, the wiring diagram shows the sender under the dizzy as soley for the guage in the guage cluster. as the sender is just a thermistor.

and the ECT signal for the ecu comes from the ECT sensor behind the head right near the thermostat.</TD></TR></TABLE>

yah, like I said I dont know GSR blocks, my little b16 doesnt have any snesor by the Thermostat.

 

ok we are all getting confused. i think mostly from terminology.

theres 3 ECT units on the gsr engine.

ECT sending unit - for the guage
ECT switch - for the fan
ECT sensor - for the ecu

the ECT switch is in the thermostat housing (2 wires)
the ECT sesor is in the head under the dizzy (2 wires)
the ECT sending unit is also in the head under the dizzy (1 wire)

thats how it is layed out in my helms for my gsr engine. i should be able to replace the sending unit with the one for the autometer guage, ill just have the issue that my stock guage will no longer work. but that shouldnt be a big deal since ill have the autometer guage to tell me the temp.

now that we got that out of the way, is it 1/8 BSPT like i suspect?

 

have you called autometer???

 

i didnt have time to read it all, but its 1/8

 

why would i call autometer? i know the thread size of the autometer sending unit. its 1/8" NPT. i just need to know the size of the honda stock sending unit. so i know what adapter i need to buy

dropped. are you saying its 1/8" BSPT?

 

1/8
yup!

 

thank you. thats all i need