Practice English Speaking&Listening with: How-To Tear Down Chevy 350 Small Block Engine Motorz #63

Difficulty: 0

I'm Chris Duke and today on Motorz we're tearing down our Chevy small block to get it ready for


Presented by AMP Research. For the past four seasons

of Motorz, we've shown you how to modify the suspension for both cars and trucks

improve your vehicles performance by showing you how to install everything from an air intake

all the way up to a supercharger. Add a ton of aftermarket accessories

and maintain your vehicle, but one thing we've yet to touch is

the heart of it all. The show is called Motorz afterall so it's about time we

started working on one of these things. We picked up this old Chevy 350 small block

V8 engine online, for under $100. Now the great thing about

working on an engine like this is that it is very common, really cheap, they're easy to work on

plus there is a lot of parts and information available on them

when shopping for an old vehicle to rebuild the biggest question is whether or not the frame is

straight, similarily when shopping for an old engine the biggest question is whether

or not the block is usable. Now whether you saw the engine running and then pulled it out

of the vehicle, or pulled it out a junkyard, the only way to truely know if the block

is usable is by breaking it down and taking a closer look at the block itself

Over the course of several episodes this season we're going to show you how to rebuild an engine

on a budget that performs well on pump gas. On todays episode

we're going to show you how to tear down this Chevy 350 engine and what to look for

along the way, before we head off to our local machine shop to get it all cleaned up

So what do we know about this engine already? Well, we pulled it out of a

1969 Chevy pickup, but we really have no idea if that was the original vehicle

for this engine. The previous owner told us that it has a blown head gasket so

we're already expecting some trouble from this 350, but the price was right, so

it's worth a shot. It goes without saying that you're going to need an engine stand, some basic wrenches

and sockets, and an engine hoist. You can rent an engine hoist for the day like

we did, and you can pickup an engine stand for around $100

Try to get one that exceeds the weight of your engine, ours is rated at 1500 lbs

and one that rotates 360 degrees. Upon initial inspection

we can already tell that it has some aftermarket parts added such as the valve covers

and the intake manifold, so we can assume other modifications have been made to this engine

we really won't know more though until we start ripping it apart.

But before we start the disassembly of our engine we can look at the casting numbers which are

in plain sight, although there might be a bit of grease and grime in the way. Now if you have trouble

reading them, even after cleaning them off with some brake clean, try smearing some paint over the

top of the numbers. Now right here located on the front of the engine are the letters

and numbers, V0325CMR, the V tells us

it was made in Flint Michigan, the 03 indicates the month, the 25

is the day, so we know it was manufacturered on March 25th

the suffix code CMR tells us the engine was made for either a

1974 or 1978 Chevy, based on this information alone

we can already determine that this engine wasn't the original engine in the 1969 truck

we pulled it out of. Digging a little deeper on the back of the engine we found a

casting number of 3970010, again looking

online we found that this number is associated with a 327 from

1968, since this is a 350 we can ignore that one, but that number

is also associated with 350 engine manufacturer between years

1969 and 1979, at the time it had a maximum horsepower

rating of 370 and could have come from a car, truck, or Corvette

Now that we know as much as we possibly can about our engine

without actually tearing it apart, lets start digging into it. Now as we remove each part

we'll look for potential problems and once we have it down to just the block we'll

take it to NuTech Engine SYstems in Ramona, California to learn the process

of machining a block. Then once we get that back we'll start the process

of rebuilding our engine using pistons from Mahle Motorsports and parts

from Eagle Speciality Products, Holley Performance Products, and other manufacturers

The tools you're going to for this project from the Sears Blue Tool Crew

include some basic ratchets, sockets, extensions, wrenches, and a

swivel adapter, a rubber mallet, a speed wrench, a breaker bar

a pry bar, and a harmonic balancer puller. Now when we come back

from our break, we'll start tearing that engine apart.

Now before we start removing all the parts on our engine we need to drain out

our oil, so we're going to grab a 13/16" wrench to remove out drain

plug, and after we've drained out our oil we're going to use an oil filter wrench to

remove our filter.

That's funny, I've never seen green oil before!

This is what oil looks like when it's full of water

if your oil looks like this, you definetely don't was to be running your engine with it

There's some oil.

Now although we can use a ratchet to remove all the bolts for our oil pan

we're going to use this speed wrench, it will make it go a lot faster so we're going to use this

7/16" socket to remove the 14 bolts along the side and then a 1/2"

socket for the two and either end.

with all of our bolts removed, we can remove our oil pan

well it looks like we've got a 2 bolt main, now lets go ahead and remove our oil filter

adapter, and oil pump flip it around and we can start removing stuff from the top of this thing

We're going to use a 7/16's socket to remove these two bolts

right here for our oil filter adapter and then a 5/8" wrench for this

bolt here for our oil pump.

It looks like we're going to need a breaker bar for that, so we're going to use a 5/8" socket and our breaker bar

to loosen it up

Now to remove the one valve cover that we've got left, we need to remove this breather cap

normally there is four bolts holding this thing on, but the two that are on the bottom are already missing

so we just have these two wingnuts up here on top

To remove out intake manifold we've got

twelve of these 9/16" bolts to remove, to get the two out from the middle

you're going to have to get one of these swivel adapters

now with those 12 bolts removed, you're going to need a pry tool

to get this guy off of there

to remove

our head, we've got a total of 17 1/2" head bolts, we've got 8 down

here on the bottom and 9 up here on the top

before you loosen or remove your last head bolt

you want to loosen these 5/8" rocker bolts as these are applying some

pressure on the head and you don't want it to fall off on you

Pull our last head bolt out here, now you might

need a pry bar to remove your head, but this one is pretty loose already so we're not going to need

to do that.

Well this doesn't look good, hopefully all it is is a blown head gasket

so lets clean this up and see if we can get the engine to turn over

The coolant worked its way into the cylinder head bolt area and then worked its way into

the cylinder from there. Now if you're only taking the intake manifold off

you can tell that there was water in the oil right here in the lifter valley.

We'll be right back after the break with more Motorz

Hey welcome back to Motorz, now during our break we removed this cylinder head

and everything looks fine over here, now before we get to the front of our engine

we need to remove all of our lifters and then we're going to take a closer look at this cylinder head to see

if it is reusable because of the damage caused from this cylinder. Well there doesn't

seem to be any significant damage caused by the blown head gasket on this head

so with some proper cleanup and some replacement parts it should be ready to go again

To dissassemble the front end of our engine, we've got to remove this pulley

the harmonic balancer and this timing chain cover. Now once we get those

three off, we can get to our timing chain and the camshaft

We'll start with a 5/8" socket on a breaker bar to remove this center bolt right here

next using a 9/16" socket

and a short extension and your breaker bar, remove the three bolts

that are holding the pulley onto the harmonic balancer

Remove the

harmonic balancer, you're going to need to get a harmonic balancer puller

Now with our harmonic balancer removed, we can remove our timing chain

cover with a 7/16" socket we're going to use our speed wrench to speed things up

Now use a 7/16" socket to remove the fuel pump mounting plate

Using a 1/2" socket remove these three

bolts holding the timing chain cam gear in place

Now put these three bolts back into the end of the cam shaft so you can pull it out

Now if you're going to reuse your crank you're going to need to remove your timing

chain gear using a gear puller. Now we've got our engine turned back upside

down so that we can remove out connecting rod bolts using a 9/16" socket

you're going to have to turn your crank a little bit to get to some of these guys that are buried way down

in there.

With the nuts still loose, use a rubber mallet to separate the cap from the

connecting rod, then you can remove the two nuts, the cap and then carefully

remove the piston and the connecting rod without damaging the crank

Now that our pistons are removed, and before we can remove out crank, we've got

to remove our 5 main bearing caps using a 5/8" socket and a

breaker bar

with those five main bearing caps removed

we can remove the crank

Well now that we're done stripping our engine

down to the block, we can take a closer look at our pistons and our bearings to

determine what else was wrong with our engine besides the blown head gasket

All 8 of our piston showed good signs of wear, but these two

were in the worse shape, this one here has a broken compression ring, and if you look

on the side you'll see scratch marks indicating that this one was rubbing against the cylinder

wall. Now this piston came from our cylinder with the blown head gasket

and you can see that these rings are cemented in there due to all the rust

and corrosion and just like this guy you'll see those scratch marks on the side indicating that it

too was rubbing up against the cylinder wall. Now the rod and main

bearings show inconsistant, uneven wear as well as scratching

and the plating is worn all the way down to the copper. Now that we've taken a look at all of

these parts, lets grab our crank and take a closer look at it

Like our bearings, our crank shows signs of uneven wear, scratches and

some heat damage. Now you can take this to your machine shop and they can fix it up

but you're going to get new, thicker bearings, now that we know the condition

of our bearings, our crank as well as our pistons, we can take

a closer look at our cylinder. When checking out your block

you want to do a visual inspect of each cylinder, checking for cracking or other

damae. Now these cylinders are in the worst condiiton the one here on the right

because of our blown head gasket which caused all that rust and corrosion on the inside

and the one next to it due to the piston that was rubbing up against the cylinder

wall. Now after doing our inspection we've determined that this block is

reusable after some machine work. One of the things that we discovered upon

closer inspection of our pistons is the .030 stamped right

on the top. What that tells us is that our cylinders have been bored over

.030 of an inch. Which means each of these cylinders has been machined

.030 of an inch larger in diameter over stock.

Partz is brought to you

by the Sears Blue Tool Crew. If your tools are looking

a bit ragged or you're just starting out and you don't have a huge budget you might want

to get some of the essentials, like this Craftsman 56 piece universal

mechanics tool set. Right away you can see how different these tools look

from many other, they're great looking matte black and brushed steel give these tools

a really unique look. What's more is the extra large size markings

in black, show up against the brushed metal

The big story here is the universal nature of this collection, instead of the usual 6 or 12

point design, each socket and box end wrench has a universal

12 tooth design that was grip 6 different fastener types and

partially stripped, or rounded hex ones, too. The 56 piece set gives

you a 3/8" drive quick release ratchet with an extension, 18 sockets

14 combo wrenches, magnetic bit handle with 10

screwdriver bits, 11 hex keys, a storage case and of course this

set comes with the famous Craftsman lifetime warranty

For under $100 you've got your essentials thanks to the Sears Blue Tool Crew

Our history with AMP Research goes all the way back to

Motorz season 1, episode 8. That was 55 episodes ago

and you know what we installed in that episode? It was the original BedStep from AMP

Research. It was easy to install, sturdy as heck because it's made right here in the

USA, and it tucks up out of the way so you don't have some big old eyesore of a step

hanging off the back of your truck while you're driving around town. Well they've done it again

with the BedStep2. Whereas the original BedStep was designed

for the rear of your truck, the new BedStep2 is designed for either side

of your truck, just behind your cab. It allows you to quickly access your

trucks toolbox, or just give you a leg up to easily access the front

of your truck bed. Just kick it down with your foot and step on up

It supports up to 300 lbs and features a high traction composite step

pad so you're not going to slip off, it's made from die cast aluminum and it's backed

by a 3 year warranty. Now stay tuned for an upcoming episode of Motorz

this season where we're going to show you how to install all of AMP Research's products

on a Chevy Silverado, including the BedXtender, the incredible

PowerStep, the original BedStep, and of course the

BedStep2. Are you looking for more performance from

your fuel system? Well FST Performance has what you need, whether its for

automotive, or marine applications. Now what I've got right here is their

RPM 300 high performance fuel filter and water seperator

system that comes in red, just like this one, or a clear anodized

finish, it's small size - only four inches when you add on the filter and

it's dual inlet and outlet ports helps a great deal with it comes to installation

the included 4 micron filter is designed for gasoline, ethanol

and/or methanol fuels., So you can definitely take this bad boy

racing with you since it supports up to 300 gallons per hour which can handle any

engines up to 2000 horsepower. Now for more information visit the Partz

page at our website, Letterz - brought to you by E3 Spark Plugs

Born to Burn.

Hey, are you on Facebook? Cause if you are you should check out our Motorz TV Facebook

page at, every month we're giving away free

tools from the Sears Blue Tool Crew, so you don't want to miss out on any important announcement

plus we're always uploading photos and videos from behind the scenes

while we're filming the show. And of course you don't want to miss out on any important

news updates. So head on over the Motorz TV facebook page and click that

big ol' like button at the top. Now our first letter comes from Nick who writes -

Hello Chris, your show is one of the best, most in depth shows I have ever watched.

I like it so much I watched all four seasons in two days.

Next month i will be getting a 2006 trailblazer and I was wondering

what would be some cheap but powerful upgrades? [Chris] Well Nick, of course you can do

the intake and exhaust combination, you want to do both because you want to open up both ends

now those are inexpensive, you can do it yourself and you will feel the difference

the other upgrade you should do to give you a little bit of added performance and it's really simple

to do is upgrade your spark plugs to E3's.

Next up is Wayne Shaw who writes - Hey Chris, I've been all over the Motorz

website looking to purchase one of those dapper shirts you wear on the show

Do ya know where I coudl buy one? PS. I love the out-takes at the end of the shows. Keep it up!

[Chris] Well Wayne, we don't have them there now but we are going to have them soon.

some shirts, so just click that store link at the top of our website, if it's not there just

keep checking back. Now as far as the outtakes, those are fun, man.

We have so much fun on this show it's great being able to share that, we've been doing that since

episode 1. So if you guys out there haven't seen the credits

in any episode of Motorz, I beg you, check it out, they're funny and I

just make a fool out of myself. Now Leon Davis writes -

Hi Chris, I've got a 2007 Mustang 4.0 and I would like to install

a side exhaust kit and can't find a kit anywhere. Also do I need to have my computer

reconfigured if a cold air intake is added?

[Chris] Leon, check out Cervini's, they have one for the V8 as well as your

V6. The other one to check out is one called Blowby Racing

as far as the intake it depends on the manufacturer. Some do and soem don't

so I recommend that you give them a call or check out their website to see if you need a program

to install their air intake. Now a viewer named

Tom asked - Where did you buy the Hella lights on the 2005 Ford F-150?

[Chris] Well Tom, if you head on over to and you scroll down

to a linked called where to buy, click that

and you'll get a huge list of retailers that sell Hella Lights. Now if you

or anyone else that is watching is interested in the installation episode where we featured

Hella Lights, check out episode 5 from Season 2, episode 2 from

season 3, and episode 2 from season 4.

Anthony wrote - Hey Chris, First I just want to say

that I Just found out about Motorz, I'm hooked! I finished all three and a half seasons

in a little over a day. I'm currently considering buying an air compressor and some air

tools and I was wondering what kind you guys might recommend?

[Chris] Well Anthony, we've got a 27 gallon Craftsman air compressor right over here that we use for the show and we love that

thing. Now what most people don't realize is that air tools and air compressors

aren't really that expensive, especially if you get them on sale. Now theres a wide range

of tanks you can get too, you don't have to get a big ol' hurkin thing either

you can get one that fits your budget, what I recommend is that you head on over to the Sears

Blue Tool Crew and have them show you what they've got.

And finally John writes - I've got a Toyota Camry with a V6

I want to change the spark plugs, but the ones in the back are tough to reach are there any

tools or tricks that will make the job easier? [Chris] Well John, if you rewind

this episode a bunch back when we were removing the intake manifold off the top of

our small block Chevy, we used this litlte swivel adapter, I recommend

you get one of those as well as an extension to use with your sockets. WIth those

two things you can pretty much get anything in weird situations inside your engine compartment

with it. Finally, just take your time and remove any plastic

covers or anything else that might be in the way. Now John you might also want to

hold off on that, because you're going to get new spark plugs for sending in your letter

and everybody else who's letter I read on the show today gets a new set of E3 Spark

Plugs for your ride. Now to find out more information about E3's

technology or to see if they're avaialble for your ride, just head on over to Tearing down

an engine can be kind of messy, but with the right tools and the help of a buddy

you can knock it out in just a few hours. now the next step for our small block is to take it to

NuTech Engine Systems in Ramona, California we're going to have our friend Britt

walk us through the entire process of machining a block step-by-step

now for more information on all the tools that we used from the Sears Blue Tool Crew

just head on over to our website. We'll catch you next week on Motorz!

The Description of How-To Tear Down Chevy 350 Small Block Engine Motorz #63