what's going on today guys Dean from
dates at garage here in today's video
we're going to be cleaning and testing
the fill sending unit as well as zinc
plating it you're going to want to stick
around for this one
hey guys in this video I'm gonna show
you how to check resistance and fuel
sending units so I'm sending the proper
signal to the fuel gauge inside the car
show you how to clean it up it'll show
you the wrong way how to clean it up and
if you do it that way hopefully you
don't but if you do I'm gonna show you
how to zinc plate it to prevent further
corrosion check it out then lift up the
sending unit here and we're gonna take
off this bottom cap here and I'm gonna
clean this thing up you can see I got a
bit of junk in there I'm gonna want to
clean it so just run the hose to that
that cleaned up I'm also gonna get the
strainer and this guy cleaned up as well
okay before I send this sending unit
back into the car I'm gonna test to make
sure that it's reading correctly so this
is I'm gonna tell you your fuel level
vehicle you can hear there's a piece in
there that winds up and down and that's
actually going to change the resistance
level across these two terminals which
will be sending a signal back to your
fuel gauge so we're just going to
measure the resistance across here and
there's a good article on Clark's garage
that will tell you what the resistance
level should should be you can actually
do this test in the vehicle but it's
only effective if you really know how
much fuel you have in your car so it's
good to do this test out of the vehicle
then I can test the measurement with the
piece all the way at the bottom then I
can just flip it upside down and then I
can test it with the piece all the way
up at the top and see what our
resistance levels are so it's gonna do
the test first down at the bottom and
set the multimeter to poems test and
we're just going to put our meter across
terminals G and T now in your vehicle it
might be labeled something else but
it'll probably still be these two pins
here so we're just gonna measure that
here and it should be I think 63 or 67
something like that so yep we've got
sixty three point seven ohms so
it's good that's showing that the
vehicle would be low on fuel at that
point and then we're gonna move the
piece that's in sight here all the way
to the top just by flipping it upside
down then we're gonna measure here again
and I think it should be two point seven
ohms so we've got two point five ohms
across there which is good
so here I'm just going to check the
resistance as I move the sensor up
through the chamber here just to see if
we're getting a smooth consistent
measurement
and you can see the resistance slowly
going down is I'm shaking the ball down
inside here so we're just moving farther
down the the chamber and resistance is
slowly dropping see I've got it up here
on an angle oh we've just dropped it all
the way to the bottom so yeah we're
getting our 2.7 I'm gonna slowly go the
other way and you can see resistance
slowly going up which is just imitating
the fuel level getting lower and lower
so it looks like we're getting a pretty
good reading on this sending unit which
means it's working quite well and we're
just bottom right out the rate in spec
is depending on the year of your Porsche
the reading might need to be a bit
different I know the older cars it'll be
a different reading there so just check
out that link and there'll be a little
chart there that will show you what
resistant level you should be receiving
on your sending unit you can determine
whether it's good or bad needing to be
replaced or not this appears to be good
so I'm gonna keep it clean it up and pop
it back in I'm just gonna take this part
here because as you can see there's a
bit of corrosion there so I don't want
this coming back into the fuel so
obviously there's some junk in there so
I'm just gonna take this nut off here
that nut is a 7/32 size and this should
allow me do then remove this piece and I
just had to wiggle it to get it off this
piece here so that's what the inside of
your sending unit will look like it's
gonna be careful with that metal rod now
because there's a plate that slides up
and down on the post nuts in there
and very small wires in there that are
measuring the resistance of that plate
as it slides up and down so just be
careful that you don't knock this too
much otherwise you could break it then
you're replacing the hull sending unit
as you can see this tube brain here
it's rested all the hell inside so I'm
going to try and get that rust cleaned
up the best I can
it's on both ends so this is the same
tube at the top end it's also very rusty
inside there so I'm gonna just trying to
soak this in vinegar
hopefully it cleans up that rust and
doesn't ruin anything in the process and
I've just got this tray here and I'm
gonna let this sit in and we're gonna
let it soak you sort of put enough in to
cover that pipe entirely both ends just
to make sure we've got liquid going
through the whole thing as you can see
where you got some rust letting go
they're coming out of the pipe so I'm
gonna let the sit I don't know maybe for
a day or two and hopefully we can get
that rest flushed out of that okay give
these parts a good rinse
I'm just gonna clean them off a bit and
it really doesn't take much effort all I
did for this here was just sprayed it
with some water and wiped it down with a
rag and now she's pretty clean that's
ready to go back on fuel sending unit
once that sits in there get some of the
rest off with vinegar I'm gonna give
this guy another rinse now before we did
this we just want to remove the tube
surrounding mechanism and after the
black plastic end cap was removed the to
actually just pulls off in our first
room here with my assistant she's
helping to stir the Epsilon's
in the vinegar doing an awesome job
almost completely dissolved
good job Leakey thank you for your help
and better little tray here as you can
see this is gonna be our tray where
we're gonna be the fuel sending unit and
the vinegar tips and salt bath and we're
gonna be rethinking this unit so I did a
good number on it taking off the finish
as you can see on the bottom side there
so I've got this little bath here and
we're mixing up our vinegar Epsom salt
and we're going to be charging up three
volts really electricity just off these
batteries here and we're gonna be
hooking them up the positive leads to
this piece of zinc that I bought off
Amazon so after we charge it up we're
gonna let it sit for 10 or 15 minutes in
the bath you know pull it out probably
scrub it a little bit and we're gonna
set it back in the bath so to make the
mixture for the zinc plating you want to
mix Epsom salt and vinegar so we've got
you mix 1 liter of vinegar with half a
cup of Epsom salt and you can move that
upward down and just change your mixture
is equally so if you wanted to do a
bigger bath you can do two liters of
vinegar and a cup of salt and you want
to use the Epsom salt and just mix that
together when I make sure all these salt
crystals are dissolved and then you just
pour that in the bath and then you get
zinc plates hook them up to the positive
side of batteries and you want to hook
your negatives up to the actual device
you want to take on the zinc plating and
so I got my wires hooked up to my
batteries
these are putting three point two volts
so I've got a white in the red lead
going down to the positive side and I've
got them hooked up in series here and
then I've got my green on my black
hooked up to the negative side so that
I've got two ends here and I'm gonna cut
the pieces ink that I have and I'm gonna
run it to either side of the tank here
I'm just kind of twisted together right
now cuz I was just testing to see how
much voltage I had across both the wires
we're ready now to pour
our solution in here I put this piece in
here just so yeah the pipe can rest on
it and then the fuel sending unit they
pretty much straight sitting in this pan
here so you're gonna pour this in here
where you guys do this to you're going
to want to make sure you decrease the
pieces and then rinse them with
distilled water so I'll be doing that
with this piece okay so I got my piece
of metal here I've just wrapped the
negatives around it and I've got my
pieces of zinc with positive leads just
deep down here
doesn't need to be anything fancy just
need to make some contact so I'm gonna
put the bit in here just to take some of
the contaminants out of this water
and I'd rather them go on this red
Robbie bit rather than the piece I'm
trying to rethink all right so I've got
the bit in there with the negative leads
on it and I've got my zinc over there
the positive lead coming back to our
battery here and I've got our other
pieces inked on the other side the
positive lead also coming back to the
battery so just got it wrapped
underneath here just because it's health
and hold it in place a little bit you
can see the vent it's starting to bubble
up because the reaction is taking place
and it's starting to take on a bit of
that zinc so we're just gonna let that
sit for a few minutes take some of these
contaminants out of here and we'll pull
out the piece and then we'll work on the
actual piece our fuel sending unit piece
and we'll finish this off my assistant
here again and and we're gonna pull out
the bit here and see what what it looks
like you know yeah she's definitely
taking on the zinc coating I don't know
if you can tell that she definitely has
a bit of a shine to it now I could
probably leave that outside and that's
never gonna rust it's the beautiful
thing with zinc coating so we're gonna
unhook this and then we're gonna hook up
the fuel sending unit and drop the fuel
sending unit and letters ink away okay
so we got her piece in there and you can
see the reactions taking place again
see right there it's bubbling up
now I don't really know if that's the
reaction of the epsom salts and vinegar
or what but I do know that when I did
have the soaking in vinegar before it
wasn't doing that so that probably is
the electricity being put in here by
these two plates the zinc plates and
yeah it must be because as you can see
it's quite a bit of reaction going on
down here
but not too too much going on here in
the middle but I bet if I move this
plate to the little I'm probably gonna
see some more reaction yeah there you go
now the middle reacting you see the end
here isn't doing very much so if I move
this plate down here again you'll see in
this end starting to react right away so
I'm gonna have to move this back and
forth just make sure I'm getting the
everything hit here properly you can
already see that this bar starting to
turn silver rather than being that the
brown color it was when I first placed
it in here to ten minute baths is all
the products need so we'll see what it
looks like after another ten minutes in
here okay so it's been in for about ten
minutes now and it's already looking
pretty good I see the metal starting to
turn here lot of the rest has come off
still a fair bit in there though it's no
we're definitely gonna have to attack in
there for a bit saving between baths
that you should scrub it down so I got a
pan here I'm gonna scrub it down a bit
and then we're gonna soak it again so we
got round to go in here end up the zinc
plates just kind of moved here so what
we really want to attack this top piece
on the underside it was pretty bad
hopefully we can get moving on that a
little bit
all right so our zinc plating process is
complete here's a tray you see all the
debris that's in there that came out of
the sending unit and here's what's left
over on the zinc plates after the
chemical reaction and the batteries here
they still got quite a bit of charge in
them so this doesn't really take a lot
of power to do this and here's our fuel
sending unit so as you can see kind of
like a primer gray look when you do it
this way you see the original plating
let's go back like gold color to it it's
not in the greatest shape but it's still
fine the only reason why I didn't turn
out that way is because you need yellow
chromate to do that or a chromium type
chemical I was having trouble sourcing
that myself there are some companies
that offer those services but they said
they couldn't do just half the unit they
were gonna dip the whole thing in and I
didn't think there would be the greatest
idea for these wires and this unit here
so decided I just do it myself in this
little bath and just skip the chromate
process well as you can see in there it
didn't do the greatest job but not too
too bad never what it was and this is
what the side looks like in the top here
so yeah I'm pretty happy with that I
think it should work fine I've tested it
already have tested the resistance on
these terminals and the resistance is
exactly inspect so I should be getting
proper fuel rating spill with this now
inside the tube was a real bitch I
couldn't really get in there to clean it
up used a bunch of q-tips here to clean
it up best I could
and each time I seem to put a q-tip in
they were coming out dirty i rinsed in
there the bunch of distilled water ran
quite a bit through there water comes
out clean now but each time I put a
q-tip in still came out dirty but only
so much I can do yeah so there it is now
we're gonna reassemble it all right if
you wanted to make this a little bit
shinier like you're doing a piece of
metal that's going to be maybe exposed
and you want it to look a bit nicer you
can actually take steel wool and you can
scrub it down really good with the steel
wool and you can get it to shine up
actually pretty well I took a little bit
of steel wool to this
to kind of make it a little bit shinier
but I didn't go too aggressively on it I
don't know how much of the coding it
takes off if it really takes any coding
off
I saw a couple videos where the guys are
doing and it made it look pretty good
and they said it's still fully protected
so that's something you want to do you
can go right ahead but I'm not going to
bother doing that this is just going in
my fuel tank anyway so I'm not too
concerned so I'm gonna it's there to
assemble it there's little notches and
all these pieces that you're gonna watch
out for I'm gonna make sure everything
gets all lined up now you've got this
bar in this pipe in there that you're
gonna get lined up into this piece so
I'm pretty straightforward there's also
a notch at the top of this and then you
just want to take this and you want to
place it over this you go and then you
just wanna start putting your nuts and
washers back on I also zinc-coated these
as well just because they were pretty
rusted because they also got hit with
the vinegar and this is a 7/32 size nut
so you don't want to tighten that up too
much just be a plastic girl then you
take at the bottom piece here I don't
have the tactical names for any of these
parts no idea what they're called but
just gonna put that back on then your
washer goes on now I took this apart and
didn't notice that there were some
Loctite on here now red was on there I
don't have red so I'm gonna use just a
little dab of blue loctite and then
you're finding that that's another 7/32
that as well
well just help prevent the nut from
coming loose
we've gotta feel setting unit back
together
ready to go back in the vehicle I hope
you guys enjoyed the video don't forget
to like the video subscribe to the
channel hit that notification though see
you guys in the next one
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