b18a block, no pics right now...but if you are looking at the back of the block, this hole is located about 1 inch to the right, and 1/2 inch above the left port that you remove for a catch can. The hole is threaded and large enough for your pinky to fit in... oil temp sensor?

 

knock sensor...

 

It looks as if it goes all the way into the block, like you can see the backside of the sleeve...

 

?

 

if its right under where the head bolts up
& its a pre-threded hole that does not lead into the block then its 4 a knock sensor

if its to the left of the oil filter & it leads into the block its where u oil pressure sensor goes

 

there used to be a little nipple there that connected to the black breather box on the back of the block.

-joseph

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tha_badguy &raquo;</TD></TR><TR><TD CLASS="quote">knock sensor...
</TD></TR></TABLE>

he said b18a, no knock sensor.

Yes its for the breather box, like the dude above me said.

 

yea like i said

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybrid1990crx &raquo;</TD></TR><TR><TD CLASS="quote">

he said b18a, no knock sensor.

Yes its for the breather box, like the dude above me said.</TD></TR></TABLE>

the breather box hole is to the right of the oil filter, already plugged it... this one is to the left of the oil filter, threaded... and large enough to stick your pinky in. Oil pressure sensor?

 

oh duh me.

yeah i replace one of those yesterday. sounds like oil pressure.

 

any idea where I can get a plug for it?

 

you could just take the sensor off a d series block and put it in. or a b series.

or im sure you could go to a hardware store and find something that will thread into it to block it off.

 

so are you talking aout the breather nipple or the oil pressure sender hole....

-joseph

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lightcrx &raquo;</TD></TR><TR><TD CLASS="quote">so are you talking aout the breather nipple or the oil pressure sender hole....

-joseph</TD></TR></TABLE>

I have the breather fittings from honda, we are talking about the hole between the left breather fitting, and the oil filter...

 

Yea dude, thats for oil. You can plug it with a 1/8 BSPT (NOT NPT FROM LOWES) plug. Or, just get the switch off any old Honda motor and screw it in there. Dont over tq it.