Tearing Down a JUNK Engine From One of Our COMPETITORS!

Dave's Auto Center review

4 giờ trước
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00:00We've sent this gentleman, a remanufactured, a TowMonster engine, we're now going to tear down his core.

00:08So let me explain what a core is. A lot of times customers are like, what do you mean by a core chart?

00:13We'll send you an engine. Then when you get it, you're going to send us back what we sent you, basically.

00:20And this is what a long block is. We need the valve train intact. We don't want you to take the rocker arms off.

00:26You're going to take the turbo and all the pedestal off. You'll take the high-pressure pump off. That'll come off.

00:32You'll take your front timing cover off, your oil pan, all the, we call it all the peripherals.

00:37So basically all I need you to worry about sending me back is exactly what we sent you, and we call this a long block.

00:44Which is basically the head, all the rocker arms, the pushrod, the valve train, and all that.

00:51I don't need, I don't want the front cover. I don't want the rear cover or the flywheel.

00:56None of that. This is all we're going to do.

00:58And then we tear this motor down, and we'll inspect it to see if it's a viable core.

01:03Now what is a viable core?

01:04I cannot have any cracks in the cylinder heads, cracks in the block, holes in the block,

01:11a crankshaft that's beyond repair, or a camshaft that's beyond repair.

01:17So we're going to tear this down, and we're going to find out, is this a viable core?

01:21Will the gentleman get full core credit back, or will there be some credits because of the parts that are broken?

01:29Let's find out.

01:30So this was not the original engine in this customer's truck.

01:33He told me that. He had bought an engine, and had it, and had replaced it, and it failed on him.

01:40So we're going to find out what it failed.

01:42So we're going to find out what it failed.

02:10So we're going to find out what it failed.

02:40So let's do this.

02:50Woo!

02:50Yeah.

02:56Woo!

03:02Woo!

03:03Woo!

03:05Woo!

03:06Woo!

03:07Woo!

03:08Woo!

03:09I haven't really found a problem yet

03:39yeah here we go now we get now we get to down to the nitty-gritty or the crappy

04:01yeah so let's just see how much yeah the customer probably complained now this motor was shipped

04:13out to Florida our motor this this was returned to us from Florida and I'm sure if I called the

04:20customer he'd say yeah the thing was rattling and making a knocking noise a lot of times people

04:25want me to speculate like like that bearing it's uh got a lot of dirt matter on it it's hard to say

04:33to look at the motor because in here I have no sludge buildup or anything like that

04:37now this dirt here that we're finding here this don't don't let that fool you that's that's that

04:42was done in shipping in fact this this uh here let me see so yeah this is overheat the babbitt's

04:51coming off the bearing so it's uh you know it's definitely lack of lubrication to the to the main

05:00the the rod bearings be interesting to see if we find the same same thing on the main bearings now

05:05this is the 67 and if you'll watch one of my very first YouTube videos longs on a 67 this motor

05:13is notorious for it takes a a very long time for the mains to get oil on this motor they're actually

05:20the last thing besides the rods to get oil because it has to fill up the hollow camshaft it's got to

05:28go through this huge piping in the oil pan the oil cooler and all that before we actually get pressured

05:33to the main and the rods and uh this could just be that problem so uh I've developed a uh a fix for

05:45for this motor for that particular issue and uh just let everybody know we're seeking patent on it

05:52right as we speak so I'm pretty excited about getting that release because I'm telling you

05:57the the the most famous thing this motor goes down for is spun main bearing so let's see if we

06:03got a spun main bearing on this thing

06:05it didn't spin the main but the main has suffered this is usually dirt when you see

06:33this but this could be you know bearing matter that was cutting loose on other bearings

06:40didn't spin that one

06:50yeah there's a spun so this one spun the bearing the middle one here a lot of guys out there they

07:11say I've torn down that motor I've never seen a spun main bearing well have you tore down hundreds of the

07:17six seven power stroke I would almost venture to say that nobody in america is doing more of them

07:21than me and uh you can see that so this this block this block is junk once it spins that the block is junk

07:30so he will be charged for the block core on that the head seemed to be okay but the block is junk

07:37and we'll lift this crank out of here but you can see the parting line the parting line on that main bearing

07:42is right here so the bearing has actually caught itself and spun in the motor and uh go ahead and

07:52finish getting your rods out of there we'll lift it out of there and show them the reason that it ruins

07:55the block is let me explain that is the the main bore housing is very let me let me show you a main bore

08:02housing here

08:03that housing has to be perfectly around and it can't be you know egg shaped or you know oblong

08:12or anything like that it has to be perfectly round and it has to be perfectly around within

08:16point zero zero zero two of an inch two thousand two ten thousands of an inch that's ten times finer than a

08:25human hair that's how critical that bore size is concentric and round and when you you take a

08:33bearing journal and you spin it around in there dry like that it ruins it we got this all tore down and

08:39i thought i'd show you this so this is one two three four five mains these are the bottom uh of the mains

08:47actually when i say the bottom these are actually the top this is where the oil comes from the camshaft

08:53housing down into the main to charge uh the mains and remember the mains are the last thing to get

08:59charged this is the main you can see how bad it's tore up that actually spun in the housing and you can

09:05see this ridge here on the back side of that bearing where it spun in the housing so uh every rod bearing

09:15has been trashed because of that this is a real problem with this motor the uh the way this motor

09:22receives oil pressure is not optimal

09:34so

09:52so

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