can you tell it like interviews it is the remax spring pressure testing tool
the school is used to to establish the installed spring tension of the spring
that
holds the valve in position when it's reassembled in the film their head
the other relative uh...
measurements that we need to take a look at
is this spring the open pressure
in the spring close pressure
so it's how this spring is sitting assembled in the cylinder head
so the two more here it has a scale on the side
begins is a very asian of readings
the readings goin increments
of typical e
twenty to forty thousand seven inch at a time
if your specification falls between those rangers then it's going to be hard
to establish the exact measurement
sold what we're going to do is we're going to use our
uh... vernier caliper
and then adjust the to rule
tumi that table height
to fall within exact specifications
now the manufacturer of this particular style of spring
happens to use
uh... p double well nor counter wound spring assembly
the one mean spring in the wire diameter this brain controls the opening and
closing in the meantime spring tension
on the valve assembly while it's put together
in the cylinder head
the other spring that's on the inside
his account or wild
seen type spring
and what that does it sets up the equal indoor opposite
reaction of the osc deletion of the primary spring
that actually
mood spin creates an imbalance in the valve train as its opening and closing
the counter one spring sets up the equal and opposite reaction to control that so
that we minimize
dynamic valve flutter
that's in our skin lesion that happens in the valve trained
that is a destructive force on the seat
and the
valve
uh... fees itself
so the manufacturing again looking at the specifications for this
particular assembly his were looking for free lanes installed laying open
pressure and close test pressure
though the manufacture gives us
particular dimensions in inge value
indeed the reserves the
pressure valued in pounds per square inch
so what we need to look at is one
the dimensional amount and to the amount of pressure
that's related directly to the test procedure for the valve springs
so the manufacture of this particular val
says that the
three length of the valve
which weekend very simply measure with the vernier
caliber
is two inches two hundred and twenty five thousand seven edge
now if i take that dimension hike and check each and every one
in this one seems to be a little looser or smaller
worried about
on the money and
last month
seems to be slightly
tigers
tinted so that's one way of doing it the
height or free delaying of the springs
now if we had all of this spring's on the bench
we could take a straight edge in leah directly across the top of them to want
to check to see if they're all at the same height
anyone that's lower or higher would be in question four
installed spring hike we don't want it lower because of its lower than we have
the last spring installed tension holding the valve on etsy and
controlling it through its movement open
enclosed as akin shaft allows
the rocker arm to opening close at the house for it
so the next thing we're going to do is to check it
on the remax bring casters solemn vow to do is instead of trying to read the very
fine
small each
which i think it does not even fall into my specification
because that's what i have
is one eighty seven
or two point one eight seven thirteen point
to five all and our spring free laying is two point two to five inches
by guessing
or not falling within manufactures bacque we already have the measurement
established so what we're gonna do now is we're just gonna put it on the table
and we're going to bring it the tool anvil down
but if you watch here
you'll see it just start to move as they may contact
fruitcake
and once they've made that contact i can now
set the lock
checking that i'm not deflecting the pressure gauge
now it is set at
two inches
two hundred and twenty-five now
and i can check
all four springs in question very quickly and rapidly to determine
do i have
good springs to actually start testing
the scale just starts to read
just starts to read
and
reading it a little more than it should
which tells me that this spring
and like i a richly measured with key bernier
that this spring was one in question
being
slightly larger
or tighter than the rest which it is also with the vernier caliper
so this one here is a warning question
that could be that may have the
dimensional problems the rest
are adderall below spec
or they're right on
so that that's fast we're going to do one is we've established a free heights
relax
does this spring
have he three height available
to do the work one six point into position
in respect to where it's it's been the cylinder head
so the next one is our installed height
which is one inch eight hundred and sixty thousand
soul i'm gonna look at the scale on here just to see if we have a
or denge
paid under two eighty seven fifty two
eight seventy-five so no it doesn't fall within specification
on that scale so now i'm gonna set it just like they did with my free hide it
one h eight hundred and sixty thousand
so one inch
eight hundred
twenty five
fifty
and ten
kansas needs sixty
yeah
political backing here and it just the table again now to come down until it
just starts to deflect the gauge at the bottom
which is just touching you can see the needle moving
back it up just a little bit
and now i'm gonna set the lock
now
this table is set
for all the installed spring height
uh... on
this particular about
solid for pardoning a spouse bring so now if i take it in here
and i bring it down till it stops at the top
and i read the pressure
it showing me on this scale here that the pressure
is just under one hundred psi
the manufacture spec for installed height
is a hundred psi
and i'm coming in
jest at about ninety five
the next one
this was coming in at ninety
to the next one his coming in
ninety
psi
and the very last one out of the four that we're testing today
comes in and about
seventy five
okay so manufactures bacque says at
one
that we should have a minimum of a hundred psi spring installed spratt
pressure
that's the pressure installed heightened
is where we're going to have the valve springs sitting compressed with the
keepers
and the retainer and the valve assembled in the hat
that's the pressure that we need a hundred psi to maintain consistent
contact between the valve face
and the valve seat
and giving is that correct position of the valve
when it's sitting in the solar hat
so at this particular point we have one in question
tends to be out of range for freewheeling
and we have
for a dom
three out of four that fall that fall below manufactures specs of a hundred
psi install
so now the open spring pressured so that's now on the campus shab cycles
around
starts to push on the rocker arms
opening the valves so what we have to do that was take a look at the open
pressure
which is one point four three zero inches
and i'm just gonna darlene money vernier caliper at one point
for kongers ind
syrian
series of
cleveland
okay now i'm gonna take that measurement
and it's going to have a look to see
here for close at one point four three zero on the scale on the tour
one point
for one point three seventy five to one point
four three seven
so again
it doesn't fall within the stacked on the scale
so i'm going to use my established measurement
put it on the table again to bring it down to the
spring the opened pressure just alot starts to touch
can deflect the scale
now i can lock it
to sri jacket
now this is a squad that smaller differences are distance that we're
looking at now compared to
of the free lengthy indian style type
so if i
open it to a backup now will take the one that's
in question that has failed both tests to begin with and i'm gonna bring it
down manufacture speck on this is two hundred and twenty-five pounds of
pressure
act one point four three o_ inches
so i'll bring this one down
and we are sitting at two hundred and thirty psi
manufactures speck on this one is two hundred and twenty five
so the top end of this spring pressure
is greater than the bottom end of the spring pressure
the bottom end it is
i'm very crucial one because that's what's actually holding the valve
on the valve seat
when the valve is closed in the head
the top and pressure having a little bit higher than manufactures spec
it's going to help control valve float
and to it's also been a creed a bit of a slight problem where we have too much
insult open pressure
and that can cause hammering on the seat one would slam shot
depending on the camp shot profile
checked the next couple in question here
when we get back on the side
than this one comes in dad about two hundred and ten
so the end
this one
fails compared to the other
so the one that was a question for free length and installed height failed
but passes the open
the next one fails
this one sales also at two ten
prescribed right
and then this one
probably fails also at two ten also
so the springs here
there'd be no question in my mind because of the variation of the
installed
free hidin open test pressures that we're checking
that these
springs fail
so to put them back in the engine uh...
is not a very good insurance policy for the customer or even for your own
equipment
uh... the problem happens as when we over speedy engine
can we get valve flow
the
opens bring pressure is below stack
except for the one spring which is not going to control
the valve being able to follow the camshaft profile down till it shot and
then the installed spring hike
pressure
to maintain they don't exceed to provide the ceiling
so in the justices how uh... we go about checking are
freeway installed height and opens bring pressure
for engine valve springs