hello and thanks for tuning in if you're new to the channel please hit the subscribe button
if you're returning thanks it means a lot today we're going to look at installing a 1 8
mpt fitting inside of a fuel rail so we have to tap it this is just a standard aluminum fuel rail
it's off of a fuel machine so we want to measure out where exactly you want to put that
1 8 tap and we'll set it in between the two ports down there so we get even flow through
mark it off
and then we're gonna get a 1 8 drill bit and drill our pilot hole down
and be careful not to go through the other side so let's get that drilled out
okay i left the drill bit in there so you can see
it's just a little bit of thread sticking up so if we pull the drill bit out
and do the same measurement transfer it there you'll see that the holes actually
straight across the middle and don't go through the other side now we want to drill out for the
actual um 1 8 mpt fitting let me get that drill bit because it's a very unique size
okay in order to cut the 1 8 let's hopefully get that in focus there
1 8 mpt by 27 in order to tap that correctly into a fuel rail or somewhere where you want
to get a pressure reading off of it and not leak the drill bit you need to have is an 1160
1164.
let's try and get that in focus there there it is 911 i'm sorry um 2164. there it is
2164. that's the drill bit that you're going to need to drill the size to and then use this
tapper to get everything tapped out so i'm going to drill this make sure it's all flush and then
we'll take a look at it clean it and then we'll go into the tapping process another way you can
verify is by squirting some fluid through the hole and seeing if it sprays through and there it
is so we know that that hole is tapped properly through let's keep drilling to the proper size
all right we got the hole drilled out the 2160 force i just hit it with a little round file
to knock the burrs down around the edge so it's nice and smooth now we're going to go in with
the 1 8 mpt tap gonna go about like two to three threads down and back it all the way out clean
the shavings two to three threads down back it out clean all the shavings and the object is not to go
all the way down you want to leave a little lip before you go through the rail so that you don't
bottom out the fitting that's very common see a lot of people will run the fitting all the way
down into the actual middle of the area here and that'll obstruct flow between injectors or
whatever you're trying to flow so just be careful on that you only want to go about three quarters
of the way down and leave the rest as a you know just a drilled out portion that's not threaded
all right as you can see we ran the tap all the way down except for about like two turns
run it back in by hand a little bit of oil on it
just back and forth make sure it's all cleaned out and then you want to test fit your part
all right we're going to test fit the piece here
runs down nice and smooth
and it doesn't interfere with any of the ports there so it runs in about half the way
and this is just going to be a drain port i'm not going to get any reading from this
so yeah that's that's about it real simple to do just make sure you're really careful you have
the right drill bits and don't go all the way through the fuel rail and you do not want this
fitting to be like in line blocking any of the fuel going through the ports or
anything you want to kind of have this either flush or just recessed back a little bit
okay that's what i ended up with the 1 8 mpt um hole that i drilled and tapped and then
i ran it up into a ball valve out to a drain like i said this goes on a fuel machine that
tests injectors so i wanted something to drain the fuel out of the rail but this can apply to
all types of fuel rails and vehicles hope this helps thanks for watching please subscribe