To sleeve or not to sleeve? Our Buick straight-8 heads to the machine shop | Redline Updates


– Hi, hey this is Davin
with Redline Rebuilds We’re over at Thirlby’s
with our Buick Straight 8 They have went through Completely tore all freeze
plugs and everything out of the block. So it’s all stripped down, block’s all completely tore down. So, for instance, the cam
bearings are pulled out, freeze plugs taken out. I’m glad he did that one, because that looked like a pain. Uh. Heads, you know, the
factory valves are out. We’re going to do something
a little different here. This is uh, this eats compression, but uh, everything came out, looks
like pretty good shape overall. None of the springs seem to be damaged, not that we’re gonna
reuse them but it’s always a good indicator of what
kind of life the engine had. So I know in the past when
we’ve been here, we kind of really quickly go over and
gloss over what really happens when we bring a block
and all the pieces in, so today we’re going to
talk a little more about it. (clears throat) If a block really greasy
and grimy and just that nasty mess, then uh, first of all, they’ll put it in basically a big dishwasher. It actually has Cascade in it, honestly. So it’s a big jet wash. It goes in there, kind
of gets the base grime and grease off of it. Then from there, it comes
into the, which is essentially an oven. It’s on a big roll, and
you’ll see it in the video, and it tumbles and rolls the part. But mainly what it’s doing
is it’s heating it up and baking that grease off. Kind of like when you
self-cleaning oven type of deal. It goes up to about 500
degrees, gets all that grease and grime and dirt,
and everything that’s been collected in the
paint, of course, and bakes that off, turns it
basically into a powder. From there, it’ll come over (machine whirring) into this unit. Looks exactly like an
oven, but it doesn’t have a heating element in it. What it is is it’s a sandblasting cabinet. It has, uh, so in the cabinet, it utilizes some steel shot and it’s basically sandblasting the part, spraying up at it, not
at super high pressure, doesn’t really need that. And as the part is tumbled,
of course it hits all the different surfaces and such. Now of course, you certainly
don’t want to take and assemble your engine
that’s full of shot peen so you take from this cabinet,
comes over to last cabinet, which is a cool-down cabinet
and it also just takes and blows air at it, tumbles
it around in different orientations and tries to
work all that shot out. So, currently, our head
is in the blast cabinet, so it’s getting cleaned
up from that standpoint. The block is one step ahead
and it’s in the cool-down chamber and getting tumbled. And we got about probably
another ten minutes and our block will be done. We’ll take that out,
set it up on the table and magnaflux it. (air hose whooshing) (clanging) Alright, so what Todd’s been doing is going through and
crack-checking this block. So he’s utilizing this
magnet, it creates a magnetic current through the block and then uses what looks like a perfume bottle from
the old days and basically just kind of lightly
push this powdered iron onto it. And if there is a crack,
then what it’s going to do is it’s gonna highlight that crack. It’s going to stand up and
show where that crack is at. So far, we’re not seeing
anything, we’re looking mainly on the deck surface and
then of course in the bores, just to see if it’s cracked
through into the jacket. Looking at this right now,
uh, I know the pistons were at forty over, typically you
can get a sixty over piston, I don’t see how this would
possibly clean up at a sixty over total. So, I believe we’re
looking at a lot of sleeves for this block. (indistinct chatter) (air puffing) So during our tear-down,
if you watch some of that highlight, you’ll see that
on this freeze plug and this freeze plug, they’ve
both had some tell-tale corrosion. Basically leakage coming out of them. What our concern is potentially the block is cracked around there and
that was the cause of the leak. Here are the two freeze
plugs that were in this. – [Davin] These two holes. – [Todd] That’s good. – [Davin] Right. And you can see that
they are both corroding. Now this one, you can actually
see it corroded all the way through. So this one was probably
just the fact that the freeze plug itself rotted. And most likely this is gonna be the same. Yeah, there’s a hole here. So, in this case, even though
we’re going to double check and make sure that the freeze
plug board does not have any kind of cracks around it. It appears that these freeze
plugs just flat out rotted right in the block. To the point where they started
to leak, which is better than the block, obviously, leaking. – [Davin] I know we’ve
been asked in the past Well, why would you put- why
do they even need- freeze bla-freeze holes or these
holes on the side of the block? Well the idea behind, they’re
really two fold freeze plugs in general, but the holes
are on the side of the block so when the blocks are cast,
they’re sand cast, and you have to have a water jacket. So how that water jacket’s
created is you have a core of sand, hard packed
sand, that is in there. After the block is cast,
obviously you have a hole so you can get the sand back out. Now, these are considered
freeze plugs, or called freeze plugs. They pound in, they seal
up the block, relative to coolant, but then at the
same time, by the name, freeze plugs, if the
block freezes the idea is, the water will push these out
opposed to cracking the block. – (Davin laughs) – [Todd] Is that your last one? – [Davin] Yeah (banging, scraping) Now at this point, Todd’s
going to go through and crack check all the main
saddles to make sure that none of those are cracked. (clanging) These are the areas, the main
saddle, an external crack, you know like into a water
jacket, that could be repaired fairly easy depending on where it’s at. On the main saddle, that’s,
you’re getting into an area where if you do find a
crack there, you’re looking for a new block, most likely. (air hissing) – [Todd] I think she gonna be okay – [Davin] Alright Phew. Looks like we got
a clean bill of health as far as cracks are concerned. But what we’re gonna
show you here real quick on a head that they have that has a crack, just so we can illustrate
what it’ll look like. (scraping) – [Davin] So to illustrate
the powder as it goes into a crack. This is a head that had been
magnaflux and this is the injector tube and then into
the seat and you can see that it’s cracked in between. Most likely this is an exhaust. So this is not our head, but it’s a good illustration of what a
crack will look like if there was a crack in the block. Let me get it flipped over. (scraping) – [Davin] Boom. It’s cracked now. (Davin laughs) We have a clean bill
of health on our block relative to cracks. It’s cleaned up nice, and
now we’ll get the professor over here, Mr. Mike. Have him tell us how bad the bores are. I have my bet, let’s see how close we are. – [Davin] Does not look so
grand, uh, it’s got a ton of taper in it, and it
is pitted like crazy. Mikey’s gonna be laughing
at us thinking that this is gonna clean up at sixty
if sixties are available. We very may be looking at eight sleeves. That’s my unprofessional
professional opinion. Alright sir, you gotta
show us what the verdict is here, because uh, I’m not so confident. Well, I’m confident we’re
gonna need a sleeve. – Um, yeah, we’re definitely gonna need sleeves. – uh huh – And as far as you know, this
has been bored over already. – Yeah, the pistons had at
least a stamping on all eight of them that said forty, so forty over. – Yeah. – I didn’t drop a gage in there,
but just going off of that. – Yeah, definitely those
three for positive. – [Davin] My guess was eight out of eight. He said there were probably
two that were salvageable, so obviously we’re just going
to go all eight, start fresh, standard size bore that way, and uh, we’ll be good as, good as new. (machine whirring, clacking) – Fingers crossed, no cracks, right? – That’s right. (clanging) Uh oh. It’s a light one. – Matt’s – It’s a light one (air hissing) Want it right on the ground? – [Davin] Alright, so our
main parts don’t have any cracks, that’s a good, good thing. I gotta go over and get
with Joey, figure out where we’re going to get some
sleeves and pistons from, and then likewise, the
valve seats and guides for the head, and then,
uh, we’ll be back over here at Thirlby’s soon
as those parts come in. And uh, I guess at the
end of the day, go in the garage, get your work done. Most importantly, go enjoy the ride. (upbeat music)