Crankshaft Refurbishing

Many of you have seen this one before. I apologize if bringing it back offends anyone.

Domestickilla gave me a crankshaft, and it's a nice one that I want to clean up and use again. You'll be seeing a lot of it and because of this, this video deserves to be here. I fixed what I broke, and this was my experience.

In this video Ballos Precision Machine demonstrates magnetic dye penetrant testing, crankshaft polishing and inspecting the balance of a "butchered" 4g63 6-bolt crankshaft.

[domestickilla]

Glad your still enjoying the crank im very happy it went to well appreciated home. As i told you before it was a pleasure and a honor to donate to your project and have a tiny hand in your build. I really do hope that crank takes your cars performance to another level. Keep in touch .

[NickKautz]

From my own racing experience, having rebuilt engines in the pits between saturday and sunday, I can confirm a few interesting things. Journals can have gnarly DEEP grooves as long they are inline with the rotation of the crank and and you smooth them out as best you can. But if they curve outward, they'll divert oil outward. Consider how high quality aftermarket bearings often have a deep-ass groove by design AND are narrower overall than OEM. Also you can sand the surface of the bearing, you can throw it in the dirt and still use it. You can dump aluminum shavings in your motor along with kitty litter, but no iron or steel. You can reuse removed bearings but you have bend them outward a little bit so they'll fit snug. If they're loose, they'll spin. The tang won't stop it, only crush does....or snug fitment. Oh, and you can race an engine with no secondary rings or oil control rings, didn't make much of a difference.

[jpityyy]

As a machinist thank you for spreading the word on doughnuts lol. We can't possibly get enough

[markrich]

Im 33 now when I was 19 I had a a 90 1st gen gsx . 
.2g exhaust manifold,  HKS cam with adjustable timing gears, larger 16g turbo with boost controller. 
Those few mods with boost turned up OMG that little guy was a monster . I tormented my poor neighbors.
 Im a V8  truck guy . Honestly that is the only car I would consider re buying to build.
Im a machinist now, went to college have a bs in engineering  and work making hydraulic parts for air crafts . I miss doing stuff like this. Funny thing is out in my garage I have a 4 axis cnc mill and lathe . It sits there these days. 
Good luck with your builds . They make me envious .

[fordguy]

Sometimes I really wish I were a machinist instead of a mechanic. Those tools look killer.

[axlegrind]

i don't get it. the crankshaft turns in one direction. the inner four counterweights are knife edged one direction...the outer four counterweights are knife edged the other.

[ScubaTiger]

Back when I was in high school (about 1976/77) we had a class trip to what you might call a mass production rebuilder. (Garden State Motors).
When they got an engine with a worn out crankshaft they would put it in a machine with an arc welding stick on it. They would weld a bead across all of the journals.
They would machine it down to the original specs.
I have never seen anything like it before or since.

[andrewwilson]

Apart from the donuts and coffee the other essential thing to bring is a friendly attitude and a smile on your face! Trust me, it goes a long way towards you getting what you want or need. Nothing slows down and drags out a job as much as a shitty attitude does!

[erickrayos]

Correction on the NDI, it's not a Magnetic particle inspection and Dye penetrant are two different things, Magnetic particle which is shown here uses very fine metallic things which funny enough called "glow stuff" by magnaflux when I read thru my publications which is carried by a carrier normally oil based. The dye penetrant is just as its name, its a dye that seeps into the fine cracks, you remove the excess after letting it dwell (normally 30mins) and apply a developer over it and wait again which is half the time of the penetrant dwell time (15mins) and then you can inspect afterwards w/ black light under a dark room.

[stevemurphy]

Definitely one of the better Self-Help youtube videos I've ever seen done by an average Joe Blow guy. You were both editorial & professional in your presentation.

[brinjoness]

that box of krispy kreme donuts costs about 30 dollars in australia, 6 pack of good beer about 18. Nobody takes donuts to anyone here.

[WilliamDye-willdye]

I'm hesitant to say this to a known OCMP2 (obsessive compulsive metal-polishing perfectionist), but would there be a measurable net benefit to polishing the counterweights so that oil slips off the surface with less friction?

[rosaliahaimbodi]

Do you have any idea on why my machine cut overall on one side...my machine is giving me pressure

[bitcoredotorg]

Hey, no apologies needed about this correction video, just imagining that thing spinning in a crank case, slicing through oil spray is awesome.

[RoboticsNShenanigans]

So true about the doughnuts, and you got the right kind too. Bringing Dunkin Frosted Bagels might get your crank "accidentally" dropped.

[E-vd]

Hi,  fellow life long learner. 
I am currently working on an 09 sonata and ran into one of your videos 
I will check out as many as I can, thank you for your time. 

[a-labtv]

Hi Man. How much did you pay to the mashihinist for that job? How much does this job cost in the US? I'm rebuilding Navigators's 5.4. Have to do boring and honing of the block. It cost 35 euro for 1 cylinder.

[Weihrauch]

A crank from manufacturers right on the edge of being out of balance. The drilled holes in the counterweights/webs should be as close to centre of the web as possible not to the extremities/edge of the crank webs.

I'd also be interested to see what the journal roundness and lobing would be from lapping on a precision bit of equipment like an Adcole.

Either way, still friggin brilliant to see old school machine shops doing work like this!

[iliketacos]

Outstanding work protecting and shipping the crank . People who care rock .

[zxztv]

Great to have experts inspecting/polishing the crankshaft :-))

You can have full confidence its perfect :-)