Blueprint 104 - The Crankshaft
It's important to know what you've got even before dealing with the
machinist. If you want to inspect a crankshaft, this is how you do it. I
detail the process of removing the crank and what to measure. All
specifications in this video are illustrated with a 6-bolt 4g63 turbo block, but are all actually the same for
7-bolt engines with the exception of the rod widths.
How to polish a crank ( crankshaft )
Engine-Guru.com Presents a video on how to polish your crank shaft. Any
questions call 616-430-3114 ask for KYLE. We are located out of Grand
How to Balance internally & externally balanced Crankshafts (Crank)
Anthony @ DIYautotech here showing you how I learned to balance a crank.
We have ASE Certified professor demonstrating how to balance both
internally & externally balanced cranks.
If you have any questions please leave a comment below.
This is being done at Saddleback College Automotive Machine Shop.
Saddleback offers and excellent Automotive program that can be completed in
just about 2 years. If you wanna get into the industry & have as much fun
learning as I have...then you should come on down and check out our shop!
6-bolt 4g63 Crankshaft Chamfer & Oil Clearances
These are some things you need to think about during your build. Some
engines don't have any chamfer on oiled journals whatsoever. All equipment
like that can benefit from at least a light chamfer like the one that's on
a stock Mitsubishi crank shown in this video.
When you Chamfer an oil passage, you create a low-pressure zone where the
edges of the oil passage lift away from the bearing as it passes over it.
The principles of fluid dynamics dictate that if there wasn't an available
substance to displace that low pressure zone (in this scenario, there is an
oil supply), cavitation might occur. If we were talking about
aerodynamics, the effect would be lift.
An extremely-advanced or leading chamfer is actually capable of sucking oil
off of a flat bearing, whereas a trailing chamfer vacuums oil out of a
gallery and does a better job of spreading it around.
The modification that was performed here is intended to increase oil flow
to the mains and the rods. It's mentioned in the video that I'm setting up
my rod oil clearances on the looser side of spec. This will decrease block
oil pressure because more oil will be able to leak past the fillets of the
crankshaft and back to the pan.
But there's another modification being performed. A balance shaft
elimination. There will be lots of debate about this in the coming videos
as that transpires, but one of the side-affects of doing a BSE is increased
oil pressure. With several internal oil holes plugged off inside the
block, I will have a spike in oil pressure. I had my chamfers cut straight
in order to offer the largest practical surface area to apply oil to the
mains and rods. My intention is to relieve some of this oil flow that
doesn't have anywhere else to go. With the added flow, the straight
chamfer is actually beneficial to the mains, allowing them to intake more
oil as well as to spread more of it on the flats below the grooved upper
The animations illustrate this completely. They were created by
yours-truly. I know the oil hole on the mains is on the wrong side. It
was too much work to fix, but they get the point across. Don't laugh at
them any harder than I did.
BMW Connecting Rod Modifications
John Edwards discusses how he machines BMW connecting rods to reduce weight
for increased RPM for naturally aspirated and forced induction engines.
Cutting Chevy Crank Keyway for Blower Drive
This times it's a BBC that John is machining a 1/4" keyway into a stroker
crank so that a blower drive can be installed, watch as he performs this
task @ Costa Mesa R&D Automotive Machine. www.engine-machining.com (949)
H D Cylinder Boring
Watch John Edwards @ Costa Mesa R&D Automotive Machine as he bores a
Harley-Davidson bylinder for larger pistons. (949) 631-6376 Don't forget to
'Clicl' and SUBSCRIBE.
Fiat X1/9 Pistons & Connecting Rods
This video will show some of the modifications that are made by John
Edwards @ Costa Mesa R&D Automotive Machine on a 1500cc Fiat X1/9 (Punto
Marea) connecting rods and new forged JE pistons. www.engine-machining.com
Connecting Rods Machine Shop Video-Engine Building DVD
Buy the "Basic Engine Building" DVD
Basic Engine Building DVD - Chapter 27: Connecting Rods
By now the connecting rods are ready for pistons. We recommend having the
machine shop clean your old pistons for you, if you plan to reuse them.
It's not fun at all by hand. Here we show you how they install the rod pins
into the connecting rods to connect with the pistons. Then they will
measure the pistons to determine the final bore size of the cylinder walls
before they are honed.
BoxWrench.net is a community and resource designed for automotive
enthusiasts. The Basic Engine Building DVD is over three hours of engine
building that covers everything from removal and disassembly to final
assembly and engine start-up. This is the ultimate DVD for any home
mechanic or engine enthusiast that wants to see a complete rebuild from
Teardown to Start-Up. This video can be used to learn how to work on almost
any type of internal combustion engine including V8, V6, Straight 8,
in-line 6 and even 4 cylinder engines. All of the interactive features and
menus will not work over YouTube.
This video is great for people interested in car repair, car care, and
restoration. As well as hot rods, muscle cars, performance parts, and Boosting horsepower. It can also help
you to gain knowledge for increasing fuel economy, how to lower your
emissions, and covers preventative maintenance to avoid little things like
Get the full DVD with all of the interactive menus, Tools section and
engine Glossary terms here...
Don't forget our Holley Installation & Tuning DVD. Sample clips on our
youtube page and at our store here...
New Transmission DVDs and a Differential Rebuilding DVD just added.
Educating the Automotive Enthusiast
BoxWrench on Facebook:
Automotive Connecting Rods 101
John Edwards discusses the various types of connecting rods found in modern
engines. www.engine-machining.com (949) 631-6376