Sorry to sound like a noob but I have a B18A OBD0 Block and it has an Xtra sensor I've never seen b4

I know one is the oil pressure the single prong and the 2 prong is the fan switch but what about the green round one??


Modified by zCivic at 6:19 PM 7/28/2003

 

bump..i wanna know too

 

The single prong is actually the oil pressure sensor and the sensor you want to know about looks like an obd 1 temp sensor that someone put in later.

 

yeah I realized I had the oil pressure switch named wrong I'm sickly is that round green a coolant temp switch of some sort and is it used in a EF swap??

 

I think it might be. Did the person that had that motor befor you do a swap with it? If so he probabally used the newer style sensor (the green one) instead of hooking it up the the two prong sensor.

 

I think its the coolant temp. And the other one beside and above it is to activate the fan. The one below that one is oil pressure.

 

Could be a knock sensor...

Blaze

 

nah it looks like an ECT sensor,

the one usually under the distributor?

maybe for a guage???

t..

 

that's a knock sensor

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D-Man &raquo;</TD></TR><TR><TD CLASS="quote">that's a knock sensor</TD></TR></TABLE>

ah, dont think so.

a knock sensor has 1 prong, not two like in the picture.

dunno why you would put an ECT sensor into the oil gallery though?

t..

 

Is that an oil gallery it looks to me like its in a coolante chamber.

 

you have obviously never looked inside a block before then...

 

its not in the oil gallery,the one prong sensor on lower right is oil sensor in oil gallery..the one he is talking about is were honda usually puts its knock sensors..I dont know about all honda knock sensors only using 1 wires,the pic underneath dont look like a 1 wire, ill have to check that tomorrow but maybe somebody change it out...a typical stock location looks like this....which BTW looks exactly like the sensor in the pic above...so who hasnt looked inside a block lately

 

here is a better picture

the red circle is where teh KS goes...

the two other blue and green highlights are oil gallery plugs,

more correctly "oil return galleries" where the oil falls abck down from teh head...

 

doh!

wrong picture, but teh red circle is where teh PCV usually goes (on a B16A) and it IS an oil gallery...

teh threaded part of teh block circled in green and yellow in this pic is teh KS location




Modified by tinkerbell at 2:01 PM 7/29/2003

 

did the b18a's come with oil coolers...cause thought only GS-R's and Type R's came with that...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tinkerbell &raquo;</TD></TR><TR><TD CLASS="quote">you have obviously never looked inside a block before then...</TD></TR></TABLE>

Sorry tinkerbell no need to be a smart *** about it I was just putting in my two cents. By the way I have built 2 b-series engines but can't recall every cambers function. You probabally are right.

 

i want to know what's the plug with the two prongs sticking out..i am using my first gen wiring harness on a civic si(99-00) block and it does not have that lightgreen plug..if i dont' plug anything to it..would it matter? or what is it? because i am not sure of what it is.

 

there are two light green two pronged plugs teh one on the RHS is for the radiator fan switch, the one on hte LHS (the one we are arguing about) is an ECT sensor that has for some reason been attached to the oil gallery plug...

here is a link to my picture:

http://forums.clubrsx.com/gall...?1956

the blue circle is the oil gallery plug

the red circle is where the PCV goes on B16A

the green square is another oil gallery plug (where the PCV can goes on B16A)

the green and yellow circle is where the KS goes

 

D-man,

It is NOT a knock sensor. That is a fact. Tinkerbell was correct when he said that the Honda knock sensors are one wire. Honda knock sensors get their ground when knock occurs and causes the sensor to go to ground and complete the circuit.


To answer the question, it is the ECT sensor. The older B18A blocks did not have the ECT in the thermostat housing. It was on the back of the block near the oil filter.

zCivic,

Check the thermostat housing that came with the motor in question. I bet that there is no ECT sensor on it. Let us know...

-kenji

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kenji &raquo;</TD></TR><TR><TD CLASS="quote">D-man,
It is NOT a knock sensor. -kenji</TD></TR></TABLE>

Yeah I know I was wrong but I said I wasnt sure until today...I just looked over my wire diagrams for just about every honda,every one was 1 wire.


Modified by D-Man at 11:55 AM 7/29/2003

 

I know that my buddy's b16a had that green two pole sensor on it. Also, i believe that the DPFI EF models also had that sensor. There is a yellow wire and a black wire that lead to it with a big black rubber boot to cover it up. SO what is the verdict here?- if your harness has the wires for that sensor is it necessary?

Both cars that I am swapping right now had that sensor/wires on the harness. SO what do I do with those wires?

 

Ok So far I've came up with its a coolant sensor which I'll just leave unplugged. Its a PR3 head so the coolant sensor is in the head problem fixed Funny thing is the B18A head also has the coolant sensor. That is a B18A block with a 1st gen B16 Oil cooler getting it drilled and taped to accept the fitting for the block and I have the coolant line that comes off the water pump so I sould all be done this week. Taking it to have it balanced today. B18A, LS shot peened rods, P73 AO pistons, ITR crank girdle, oil pick up and oil pan. GS-R Water pump, oil pump. PR3 3 angle p-p and GS-R cams. Fully broke down and rebuilt all new cann't wait to drop it in


Modified by zCivic at 12:09 PM 7/29/2003

 

zCivic- The green round sensor with 2 prongs is either not a coolant sensor or it is not in the head- because it is on my friends pr3 block

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by powerofdreams8 &raquo;</TD></TR><TR><TD CLASS="quote">zCivic- The green round sensor with 2 prongs is either not a coolant sensor or it is not in the head- because it is on my friends pr3 block</TD></TR></TABLE>

They're both thermoswitches. The round, glass one with the 2 prongs is the old style, the plastic green one is the newer style. The green plastic one is typically installed in the thermostat housing cover, but there is no sensor bung on the housing on older motors. You could buy a new thermostat housing for about $10 if you'd like to return it to it's stock location, otherwise, if you're using newer harness, you're going to have to add wire to the harness so that the plug will reach the switch at this location. On my motor, I chose to buy the new housing cover so that I wouldn't have to cut the harness.