located next to see if you were going to take a look at all in this crankshaft in
bearing install
our goal is to actually establish what the vertical world clearance for the
bearing clearance appears between the main
in the mean the rings that we have just installed in the engine
the manufacturer has laid out being very good crankshaft clearance
is in the range of one day be ten thousand warble mostly a one thousand
forth our foreign seven tens
so we need a dime
arrange up for a quote clearance between one
and fourth out
that helps establish
plastic each
we're going to use
missus cleaver i'd seventy-seven engineering plastic gauge
elastic gauge on the end of the box tells us which one we need to use
the red one in particular runs specifications from anywhere from two
thousand two six thousand submitted
the green line
runs anywhere from one now
to three thousand seven eighths
so we have to know what they're running clearances based on specification first
so we know which dat using were tracking it in transit
the manufacturer has told us that were in the region one before
so we're gonna pick
a two to six thousand flee falling within the range in being able to use
this particular gauge to establish
vertical oil clearance for the clearance it's available between the bearings
and that means you're in all
when installed in the engine
okay carrying on what we're going to do is detour is made
we party forty didn't accept the bearing in the position so that we know that is
correct we installed the craig chapter and no problem now we're gonna release
it to work
need so now once we've removed the bolts that fascinates release was going to use
a fasteners again to help was remove
the bearing down
emergency we have a nice clean surface on the very
place clean surface on the current staff
presence play what we want to do with what to make sure that the crane
journalist completely clean
and free of any whale or debris
so they were going to commit was a break clean
florida white the journal surface mason clean
and what we want to do is we want to have this completely free and dry up any
quayle so that it does not
the plastic gauge when we install it
to check the clearance too
so now carrying on we felt we have the plastic each other and you can see each
one of these is it d
point that helps has established the running clear in sydney and jim
so it tells us here that this fact that we are using with this gauges two
thousand six thousand the red
and we want to try and fall within that one before it valid manufacturers
specifications for running vertical oil clearance
so we need to do is to use this gauge now
cut it to the right size
and then we're gonna install it on the crate journal
book okay so now that we've established the width of it for the journal we're
gonna open it up
and we're gonna take out the plaster seemed each or the plastic due to its
nothing more than a little piece of
uh... party that's made up of the oil-based material very similar to
plaster saint
so what we're going to do is we're gonna flat mad
in the vertical oil clearance we re install it in the engine and then delete
ur we're gonna take it apart and then measure the clearance to give us our
actual established vertical oil clearance
in the engine
now we're going to take this teaching and we're gunna said it
directly across the crank shaft
the next thing we're going to do
has to take a little bit of fresh clean engine oil and work in the loop the
berry
the reason we're doing that is because the burying does not like to have
anything to put on eight cluding your fingerprints
so we don't want the plastic each to be impregnated into the
babbitt fourteen overlay of that
babbitt bearings
sort of dot is but lots of luv on it so now what we put it into its position it
will compress
and not stick to the varying
but be squeezed out onto the crankshaft to give us an established
clearance value
so then paying attention to the install
walked a lot
campsite a rolls
positioning the bearing
using the both sides of the i_t_n_
tapping the bearing cap in the position
caused
picking out of the caps been installed
we're going to do a rundown on it
tightening the bolt from side to side so we're pulling the capt down
equally
into position
most of the
proposition in the capital been established by tapping it with a hammer
and now we're just running it down the rest of the way
with the fasteners
so i'm just gonna snot that outback
forty-two specifications
and then
removing the cap once again
who had a break apart
you know what support has been broken the fascinated with us and we're going
to take out the cap again
so now once we've removed the cap you can see we still have the oil
there's a slight hint of the plastic beads
visible here
we have lots of oil spill on here and that helps
bearing
to avoid the plastic beads from sticking to it
now if we come back down to the crank journal we can see that the plastic each
has been flattened in its actually stock to the trade chapt
that's exactly what we want to do is one of sticking to the crank shaft
not be engine bearings but then it takes time to clean and bearings
making compromiser and take a deep area by actually
impregnate ng this plasticity material into the bearing positive thoughts body
so we take a look at the games now we can see that two thousand very wide
measurement
which shows that we have a lot of room
in many ways we start to go
down on the scale
we actually decrease that measurement
so if we take a look
that the plastic each
in user guide
we want a pic at the mansion that matches it
so if we take a look at what week matched up on here matched up
forth out to be the width of that plastic gauge
but it's pretty consistent all the way across
if we seem to one side with wider than the other or skinnier than the other it
would indicate that
we had to have a keeper condition the board out of road condition of the great
job
it's very consistent
and we look at it on the beach and it's established now at four thousand seven
inch
which is that the maximum specification for the manufacturer
so this particular point
something could be done
to reduce that clearance
in that case what we would do is put a one size undersized bearing in
which is has now has more bearing material to its two fifty d undersized
dimensions of the current journal
sofa get the one size
undersized it's actually given those one thousand clearing for more thicker
buried
which actually would give us
three fap
so that would be the corrected thing to do or the correct thing to do
decrease the clearance to give us more longevity
for the customer
at this point
four thousand falls within manufactured stack
fire this point of the range which doesn't provide much longevity
so over time as those bearings where
oil clearance becomes bigger
and now the engine oil pressure drops
and when that will pressure drops
then its
time to do service on the bottom end again
fixing we're going to do here it is
spray
and pick
all the plastic beads often craig shop
making sure that we don't talk with their own inconveniences
got one more time
and as you can see
prosecutor left at all
so this particular point what we want to do is we want to go ahead
ended
say that this journals locate and we'd have to check every other want to make
sure that we have the correct running clearance
we're going back to the install that every lubricate the bearing
make sure we're going the right direction
pre-installed cap
use the bolts to guide
cap the cap into position
and then run the bolts down
once again
rundown torque
check the operation always check to make sure that i crank turns
start to manufacture specifications
and then once again confirming the operation
crankshaft when they are installed in the engine with the new fit with the
cracked clearances
should turn a quarter to a half of volker
and he conceded that strange after an israeli preemie
for any large displacement in the senate bt four oh eight engine