all right guys in this video i'm going to talk about uh main bearing clearances well bearing
clearances in general i'm going to run through the main bearing side of it i might do the connecting
right side of it too i've got everything set up here crankshaft on these v blocks i printed
rods and pistons all hung the block so check the video out subscribe to see our other videos
and uh yeah check this thing out and i'll show you how we do main bearing
clearance
okay some people uh would use plastic age or some other way to measure mainband clearance what i
prefer to do is i will i have this in here right next to the block you can see um i will mic the uh
i might crankshaft in this case we're doing the back journal first i'll make the crankshaft
i'll put the mic in a vise and then i'll set my dial board gauge
to that mic reading that'll give me a true you know zero from there i'll put the bearing
in the block main cap on the block torque stuff as per you know this is an arp so these are
uh 80 in the center 245 on the outside in three steps so we'll get that torqued and then i will
measure i can tell you currently that this is tight this thing is one and a half thou
in the back everybody's gonna have their own spec for what they want to see here um best advice i
can give you is talk to someone who's doing who builds a lot of that specific engine keep in mind
material does make a difference aluminum or iron block this is a aluminum block with an iron cap
some of the import stuff has you know an aluminum main girdle more than just a main cap and uh
and an aluminum box so keep that in mind too when you're setting this stuff because it
does expand differently obviously so i'm gonna check this again just to confirm really this is
one and a half foul and then i'm gonna pull this cap this is a set of michigan 77 bearings
um i've got a set of king bearings here there are a thou extra clearance for the coyote
and then i have a standard set of kings here as well the clearances do change the manufacturing
manufacturer i've seen a couple tents um m77 or clevite which is what's in this are generally the
tightest in my experience so i'm probably gonna put a standard set of kings in there um just to
see what we do what you also can do and not many people know this is you can swap halves so we can
do the bottom half as a standard size king in the top half as a foul extra clearance king bearing
i try to stick within manufacturers but you can mix those as well i don't suggest
it because the coatings are different and i don't know how they act with each other but
um but yeah so that'll give you if you do that if you mix the standard and thaw extra that'll give
you a half thou rather than the thau so you can get pretty picky on your bearing currents targets
so i'm going to confirm this um main bearing clearance a second
and then i'm going to swap a set of bearings in it and go right down the line i start the back first
just because the engine stand is obviously in the way i'll lay the dial board gauge in here
it'll sit in there i'll move it you know move it up and down to find the tight spot to where it's
straight in there square in there and once we get that cap set i'll move the next one move the next
one all the way down the line until we're done uh the ron buried side i do the same thing with
i'll set the micrometer to the crankshaft journal and then i'll put a rod bearing
set in the connecting rod i'll torque the connecting rod and a soft jawed mic
and i'll use the dial board gauge to mic the clearance um obviously there's it's a pretty
time consuming process uh but it's the only way to ensure all these things are set correctly
so yeah so i'm gonna get moving on this
stuff
so
okay i got all the main caps in there measure check the side you saw me bouncing back and forth
between the crankshaft and the block my micrometer and my vise or while specifically my vise are in
the other room there so that's what i was doing i was running back over there set the mic in the
holder and check the dial board gauge against it before i come back here and check the bearings
uh but these are all good interesting point um the standard king bearing uh got me to the
clearance i was looking for and the standard clevite bearing was too small so again moving
between manufacturers can can have that benefit that's what i often see is that
clevite is the tighter of the three i normally use the three being clevi m77 king and acl so
um next thing i'm going to do is i'm going to pull the caps back off and we'll get
the crankshaft in it torqued and then we'll uh we'll check rod clearance at uh at that point so
i'm not gonna make a video of that just uh because it's pretty much the same process you just watched
only with the connecting rod on it so um but yeah that's how we check uh bearing clearance here
if you know again some people use plastic gauge i found that to be
very inconsistent i much prefer the dial board gauge method as as we just did
so don't forget to uh subscribe to our channel to watch future videos like this
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you