so i had lsvtec last year and sold my block with the oil line had my had freshened and they forgot to take the plug out of vtec passage so i am forced to either run external line or take head off
i need some fittings i tried using -4an line with 1/8 fitings went in well to oil sensor on block but wont fit the head well any help would be wonderful thanks

 

You need a -4 male to 3/8 npt female fitting or 1/8 npt male to 3/8 npt female adapter.The last one you can find at home depot and some auto parts store.
Glenn

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NJIN BUILDR &raquo;</TD></TR><TR><TD CLASS="quote">You need a -4 male to 3/8 npt female fitting</TD></TR></TABLE>

 

its not npt, its bspt which is british standard pipe thread.BSPT has 27 threads per inch and NPT has 28 threads per inch.So if you use an NPT you risk the chance of stripping the hole out or breaking it off in the block.I know this because i have done it, and today i found out the the honda blocks and heads all have BSPT threaded holes and i ordered the right fittings less then 1 hour ago.I ordered a 1/8" BSPT to -4 AN fitting for the block and a 3/8" BSPT to -4 AN for the head.

 

Holy **** he's right about the BSPT, I knew it felt a little too tight screwing in, but I tightened it anyway. Where do you get the BSPT fittings? Ive never even heard of them.

 

I have never once ever had any problems using NPT fittings on a honda motor. You don't need BNPT. It feels tight because its tapered pipe thread. Thats what its suppose to feel like. Just don't over tighten anything and you will never have a problem

 

There is such a thing as a BSPT -&gt; NPT adapter. Sold at hardware, Plumbing, High Perf shops. Then screw the 1/8 NPT into that....