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00:00we got an LT now I know you guys get so bored don't you get bored you get bored
00:05of nothing but diesels and you think we don't do a lot of gas we love gas man we
00:10do a crap load of it around here and for some reason we don't show enough of it
00:16to you because people I get a lot of comments about it so we're gonna fix
00:19we're gonna start fixing that in fact we're gonna fix it so well Brian come
00:23here for a second Brian we're trying to make people happy smile for me buddy
00:26see how can you not be happy with that smile so I need you to tell me we're
00:32gonna rip this down and build it how many days machine work and everything dude
00:37full machine work short block or a whole long block about three days flexing dude
00:43three days I love it we'll excite you we'll show you all the steps so a ten day
00:49build that's what I'm gonna say I'm gonna say this is gonna be done in ten days
00:52let's go
01:07one thing you'll see about the LT is they have a longer bolt on the bottom and it's
01:13critical that you put that one back if you run this bolt and it's on the wrong
01:18side this will crush into the sleeve and ruin the cylinder it'll wreck the whole
01:22block so just make sure that your longer bolts are going in the bottom
01:48goal
01:49game
01:51definitely
01:53to open to you
01:56the one thing you got a little bit
01:58we can be Battle and ruth
01:59the other thing you got to be here
02:00it'll do
02:02we won't manage
02:03I'm gonna be out
02:04even after the year
02:06comments
02:07and I'm gonna be out
02:10in a few minutes
02:12yeah
02:14better
02:14gotten
02:15so it's real critical to replace these because this is sealing the oil galley so this is crushed
02:31or after it's installed this thing is crushed
02:34so you cannot reuse this you might have a oil leak if you try to reuse this
02:37so this is not good right here you can see this lifter starting the it's not stable
02:49so while this is running going up and down this has a chance to twist and it will wreck the can
03:07we're tearing down this engine and i have no clue what i'm looking at the top here because i'm
03:37used to seeing active fuel management having like four solenoids brian tell me what this octopus mess
03:45i'm looking at is so on lts uh they came out with the this is called dynamic fuel management so not
03:53afm it's not active fuel management ah so the differences between active fuel management and
03:59dynamic fuel management is that afm only used cylinder number one four six and seven okay and
04:07those were the ones that turned off with dynamic fuel management it's able to turn off all eight
04:12cylinders no way so that's why we have eight different solenoids yeah what is the computer
04:17looking to see so it's just looking for different throttle positions different load to calculate
04:23which cylinders to turn off how many to turn off and it's doing it just actively looking how many
04:29cylinders do we turn off to meet the torpic requirements can a customer delete the dynamic
04:35fuel management like we can delete the active fuel management yes they could both still be deleted
04:41okay that's the important part right because this system is just asking for failure yeah dynamic fuel
04:49management versus active fuel management brian just gave us the quick rundown our advice is trash it
04:55delete delete it it's garbage get rid of it causes so many issues and that's why we're doing an engine
05:05so
05:09so
05:11so
05:15so
07:48I did not see these before.
07:50I saw the block, but not really the heads.
07:52How bad were they?
07:54I mean, it's a 2019 motor, so they weren't terrible, but there was definitely surface corrosion.
08:01And then all the combustion chamber was just full of carbon, and especially the intake, since this is direct injection.
08:08Oh, yeah.
08:09It's a ton of buildup.
08:10Yeah, the intake ports were covered in carbon, and they cleaned out amazing.
08:15Yeah, I mean, I don't even see any discoloration or anything.
08:19Yeah, it's all one uniform color, and it looks really good.
08:23You know, the cool thing about the Vixen is it gives, and we struggled with this for a lot of years, is we would have to almost paint like an aluminum color over because it would be dull after we soda blasted it or something.
08:38But this gives it, but this gives it, but this gives it, these are not painted, right?
08:40Not painted, you don't even have to paint these.
08:42They're just ready to be machined and thrown on the truck.
08:45Yeah, that looks beautiful.
08:47So, if you guys don't know what the Vixen is, it's a water and glass bead mixture.
08:52It shoots super high-pressure water at the surface of this aluminum and takes all the corrosion right off.
08:59Looks like brand-new casting.
09:01Okay.
09:02All right, now we're going to machine them and cut the seats.
09:05Yep.
09:05Well, I haven't checked guides yet, so I've got to check the guides in it.
09:09Okay.
09:10The guides are bad.
09:11Replace the guides, and then cut the seats, deck it, assemble.
09:15Sweet.
09:17All righty.
09:17Rock and roll, dude.
09:18They look good.
09:18We are so lucky to have Brian.
09:22Brian is a multifaceted machinist.
09:25He can do, he not only is a great machinist, but he loves to tune gas, and he's learning how to tune diesels, too.
09:34Yeah.
09:34Is your head exploding yet on me?
09:36Every day.
09:37Every day.
09:38Anyway, but what we're going to do is we've got this LT block.
09:42We're excited.
09:43We're going to blueprint this, and we're going to, Brian's going to show you.
09:46I was going to load it.
09:47Now, first thing we've got, we've got locators.
09:51We have different locators.
09:52Now, I've shown these to you before.
09:54These are all different sizes for different blocks, but for an LT, these are the exact size
09:59and the mains, and then this will go in the cam tunnel, and we'll be able to zero the block,
10:04and we're going to map the block, basically, is what we're going to do.
10:08This is what we call blueprinting, and then we're going to take you through that.
10:12So, let's load this bad boy up.
10:23Here it is.
10:25Voila!
10:26We're going to zero off our pan rail.
10:29Yep.
10:29Sure.
10:29And then we'll whip it over and zero our decks, and then find our center line of our
10:36bores.
10:36Yep.
10:37Did I miss anything?
10:38That's pretty much it.
10:39That's it.
10:39That's it.
10:40So, here we go.
11:12All right.
11:17We've finished probing the block.
11:20Now, we've got a map of the block, and now we're going to go ahead and bore each hole.
11:24What?
11:24We're going about 15 over, and then we'll take 15 thou out of it, and then we'll hone
11:29the other five, and of course, we'll show you that.
11:33So, fire it up, dude.
12:03Hey, hey, hey.
12:33So we're doing some LT rods here, and in order to get the size that we want, because it's
13:03a cracked rod.
13:04Now, a lot of guys out there are going to go, what's a cracked rod?
13:07They fracture these rods, so you really, a lot of guys say, well, you can't recondition
13:11a rod like that, because see how that, they've been fractured, and they fit perfectly up against
13:18each other.
13:19Normally, on a connecting rod, old style, what you would do is you would shave off, you would
13:24put it in this cap grinder, and there's a wheel here, CBN wheel, and you would come across
13:30that, and you would scrape some of that material off on both sides, and what it would do is
13:36it would make the hole smaller, and then we'd use the hone to make the hole back to size.
13:43With a cracked rod, you can't do that.
13:45The parts manufacturer will sell you oversized OD bearings, 2,000ths of an inch.
13:52So what you'll do is you'll torque this rod down.
13:56Because you've got an oversized OD bearing, you're going to make that hole 2,000ths larger
14:01than stock and put in the correct bearing.
14:05We've done that with this rod here, we've put the bearing in it, and now we're going
14:10to measure and double-check to make sure that Brian's not a goober.
14:16The thing about it is, you know why he's not a goober?
14:19Because he's triple-checked his work, and you'll never be a goober if you do that.
14:252,000ths and 7,10ths.
14:28We're going to get 0.0002 right in the mid-spec of what we want on our hole clearance on that.
14:35That's as close to perfect as you're going to get.
14:37Dude, sweet, bro.
14:40So we did our vertical hone, and we've used our profilometer.
15:00We record every motor we do.
15:01I know a lot of guys, I see comments and a lot of people say, you know, a remand motor,
15:05they don't measure things, they don't torque things right, they don't build a motor right.
15:10Well, that's true.
15:11You know, there's a lot of shops out there that don't have the technology or the equipment
15:14or the know-how how to build motors right, and I can't deny that.
15:19We wouldn't be one of them.
15:20So this is one of the things we do.
15:21I've talked about it before, I've got a nice video if you just want to learn about this.
15:25This is the surface profile at the microscopic level of the cylinder wall.
15:30Our crosshatch under a microscope, we're 45.5 degrees, perfect for what we're looking for
15:35on this gas motor.
15:36We've got a few, like here's one peak that'll come off with the ring, there's another peak
15:41that'll come off.
15:42So one of the nice things about the equipment that we have, and being able to look at this
15:45at the microscopic level is, our cylinder walls are broken.
15:50I mean, by the time you crank this thing over and take it for a spin, you're broken.
15:56Which is a great thing, because less wear on your rings, less matter, cylinder wall matter
16:02that gets in with your break-in oil, you don't want that.
16:06And you're ready to go.
16:07So a lot of people say, what do I have to do to break in my motor?
16:10Nothing.
16:11Again, we document this on every motor, so we have all this information documented on
16:15every motor that we build.
16:16We really are a custom motor builder, we're not a production shop.
16:19Every motor we do, whether it's a diesel or gas, we go through the same process on
16:23every one.
16:24So if you're looking for a block, or you're looking for heads or anything like that, give
16:28us a call on our website.
16:30We sell this stuff to the general public.
16:32I got my hone master here, Brian, and he is, man.
16:37I know he doesn't talk much, but I'm telling you what.
16:39The guy can make a hole round, straight, just like you like it.
16:43Give you the surface finish that you love.
16:45And our next step is we're going to line hone the block.
16:50He's already just kissed the caps, and what do I mean by kiss the caps?
16:53We've taken off less than a foul of an inch on the cap.
16:56We're just doing that because what we want to do, almost ghost this hole.
16:59We want every hole to be perfectly straight and centerline, so we don't want any of those
17:05caps off this way, or off this way, or up or down.
17:07Now, that is a process, I can promise you.
17:10Your machine shop's not doing it unless you document this.
17:12I require on every motor, every motor.
17:17There's not a motor go through my shop that doesn't have an align hone gun on it.
17:20Flat out.
17:21I will not, I won't tolerate it.
17:23The difference when you build a motor that's had a align hone on it compared to one that
17:27ain't got, and you just put that crank in.
17:30I mean, the crank, what does it do on most blocks if you don't line on it?
17:35Friction torque and spinning the crank, it's just like butter.
17:37Yeah.
17:38When you do this, it basically, you can take the counterweights and just go, and the crank
17:43will turn.
17:44If you don't do this, I can promise you, your crank, you got to put a wrench on the
17:47thing, you know, and turn it like this.
17:50So, just a little extra secret sauce.
18:20Okay?
18:24If you want to this, it's your model and you're moving.
18:30Wow.
18:37Yeah, I'll be there.
18:45As I look at these valves, I'm wondering why we're not getting new ones, to be honest with
18:56it.
18:57Have we done our guide measurement yet?
18:59Yeah, guide you did.
19:01But you know, these stems are not polished at all, dude, and they look pretty ratty.
19:07Let's go have a discussion here.
19:14Melissa and Jesse, dial extension 107, come to the build room.
19:19I want you guys to come and tell me your thoughts on this.
19:25This is a discussion.
19:26We should probably get Bob in here.
19:27Here's what I'd like us to start thinking about, and I don't know whether we want to
19:31bring in on everybody here, but first we have to make a decision.
19:34As I look at these valves, and we were going to resurface those valves, for me, I don't
19:39think those valves should be used.
19:42You know, I don't think they should be used.
19:44See what those are, for me, those are places for a seal to just get, you know, nicked, nicked,
19:53nicked, nicked, and also they're a place for oil, for more oil retention.
19:58I mean, now am I right?
20:01I have no clue.
20:03But that's my speculation because, you know, you've got a little puddle there basically
20:08with all those little nicks.
20:10Sometimes as an engine builder we, you know, we have to make decisions.
20:14Do we want to reface a valve, recondition a valve, a crankshaft?
20:18Not every valve in a remanufactured motor is replaced.
20:20You reface them, which basically means you take a stone and you reface the sealing surface
20:26on the valve here.
20:28You want to measure the margin, make sure you've got plenty of margin in there because
20:31you're going to be taking off some of that.
20:33When you do that, you get a valve that looks, has a brand new surface on it like that.
20:39Well there's other considerations to take in too.
20:41Do you see the stem here, the polishing on the stem?
20:45That's important.
20:46For oil retention, just like on a crankshaft and a cylinder wall, you want the proper oil
20:51retention, your RA, your roughness average on that valve stem to be right.
20:54With all that pitting on there, can I collect my money and sell you a motor and you'll never
21:01know it?
21:02Mmhmm.
21:03Will you get the best product?
21:05Mmhmm.
21:06So we'll put new valves in a motor that's got a stem that's been pitted like that.
21:10The other thing I want you to notice on an LT head, they're canted valves.
21:13What do I mean by canted?
21:15If you'll notice, this guide isn't straight up and down.
21:19It's canted off this way.
21:21So in order to come in and cut that straight, we can tilt our head here.
21:27You'll notice on this head, this one here is just straight up and down.
21:31That's what these levels are here for, our digital level.
21:34We're able to cantor this to match the angle of the valve.
21:37It's really important if you get that right.
21:44So that's what the purpose of that valve is so much easier for you to get that all.
21:52That's not a good place.
21:57Uh oh.
21:57That can be a good place.
21:59I'm not getting out of here.
22:00It just kinda makes it easier to get rid of.
22:01That's when I'm getting into the valve and I'm not getting into the valve.
22:03It's a very important part.
22:05Mmhmm.
22:06I just want to finish the valve.
22:06I don't want to separate it, but I don't want to be able to take it.
23:48It's fun to watch these guys assemble an engine because sometimes they'll spend hours measuring
23:58and gapping piston rings and measuring journal clearances and everything like that.
24:04And then you look away and then you look back and the engine's built.
24:08So the attention of detail that they put into every single cylinder, every single surface
24:14is really, I think, key into being a good engine builder because I watch these guys do this.
24:20I've done a little bit myself, but I'm no pro like Jesse.
24:23And so if you want to build it to last, you need to measure everything.
24:28And if you don't, well, it's probably going to bite you in the butt sooner or later.
24:31And look, they've always got it laid out.
24:33They've always got pistons, rings, everything like that.
24:35But it's an arc.
24:36It's a beauty.
24:37It's a beauty.
24:51It's a beauty.
29:26We've got the pan on it because this has the integral oil filter on the pan, so you've
29:31got to put the oil pan on it, but we've got the lower pickup screen in our sump there.
29:36Let's spin it up, dude.
29:37Let's spin it up.
29:38Let's spin it up, dude.
29:39Oh, it's nice and cool.
29:44Here we go.
29:47Oh, yeah, man.
29:48Yeah, man.
29:49Yeah, man.
29:50Yeah, man.
29:51We came up there 45 PSI.
29:52It's how nice it sounds, so what we do here while this is running.
29:59So what we do here while this is running, you just want to look at stuff.
30:09It sounds absolutely fabulous.
30:10It sounds absolutely fabulous.
30:11And now we'll run a compression test on it.
30:15It's got good compression.
30:16We've pressure tested the motor.
30:17It holds 20 PSI for a half hour, no leaks.
30:21We'll run a compression test on it now, and we'll be done, ready for shipping.
30:26Hey, if you're interested in this motor, this is an L84.
30:30L84 out of 2019 and up, Silverado, Sierra.
30:35Suburban.
30:36About 2020 or 2021 and up, Suburban and Tavos.
30:39Yeah.
30:40And we put some few goodies in here.
30:43We've got the DOD delete.
30:45Yep, DOD delete.
30:48So this is 50 state legal to sell in if you want it for your California vehicle or whatever.
30:53You're good to go.
30:55Hyper eutectic pistons.
30:57We put a stock cam in it though, didn't we?
30:59So yeah, stock cam from the L8T, which didn't have DOD.
31:03So that's the cam you have to use.
31:05Right.
31:06You're going to delete the DOD.
31:07Good.
31:09But if you want the build sheet and you're interested in it, reply to the link and we'll get you information.
31:14Thanks.
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