Blueprint 101 - Using Micrometers, Calipers, & Bore Gauges

If you're going to rebuild an engine, this video is required material. None of your measurements mean anything if they're not accurate. I illustrate the calibration and use of 3 major tools needed for taking measurements, and a brief demonstration of how they work. These are by no means the ONLY ways to use or calibrate these tools. This is simply the method I will employ to measure parts in later videos so this instruction doesn't distract from their intended messages. Even if you're familiar with these tools, you may find something useful here, or even be able to correct me and my rusty skills.

Category:

Autos & Vehicles

Tags:

• Jafro
• Jafromobile
• Blueprint
• engine
• motor
• calibrate
• micrometer
• dial
• indicator
• bore
• gauge
• document
• measure
• measurement
• size
• mm
• inches
• in
• metric
• SAE
• tenths
• hundredths
• thousandths
• fraction
• zero
• oil
• clearance
• bearing
• spec
• specification
• tolerance
• diameter
• 4g63
• Turbo
• 6-bolt
• 7-bolt
• 6bolt
• 7bolt
• Mitsubishi
• Eclipse
• Galant
• VR=4
• Talon
• Laser
• SAE International

[Jafromobile]

Actually, these micrometers can't be zero'd. They come with the spanner so you can reference how far they are off. I've disassembled and reassembled them, and there's no adjustment on harbor freight micrometers to line up the zero mark. I tried. You just reference how far it's off against the spanners and add it to your measurements. According to what I googled and read, that's actually a standard practice.

[sivucit]

hi, i think the wear is 14 10,000 of an inch not 14 000 of an inch.. please advise it is (3.3474 - 3.3460) gets .0014 . you can see this at 9.58 run tim of ur show. I may be wrong, pls comment. Second to go with digital guage, i assume you just change Dial guage with Digital guage and use same adapter, avnils etc. is that right.

[Jafromobile]

@sivucit Yeah, but it's written on the white board correctly. :) I'm thinking, talking un-scripted, writing, working with both hands and a white board while operating a camera and concentrating on staying in the shot. I think I can be forgiven this time. :P

Yes, you can change it out to a digital indicator. The one I have is a .0005, not a .00005 like this dial-type. I use it like that on Blueprint 106 because it's easier to read (and shoot), and bores don't require .00005" accuracy.

[Jafromobile]

@sivucit good catch! See other reply. I know YouTube only notifies you on one reply even when you get two.

[MrTurbo4G63T]

bought all the tools at harbor freight eh??

[Jafromobile]

@MrTurbo4G63T Not the bore gauge, but otherwise, YEAH! I'm still hunting for used Mitutoyo .0001" outside micrometers in 1-2", 2-3" and 3-4". Like the bore gauge, I can't justify the expense of buying them new with how little they would get used.

[pelespoland]

umm, why are you writing how much off the micrometer is?

there's a spanner wrench included to zero out the micrometer if it's off

[XBLoganSX]

You use the telescoping bore gauge, measure it with the micrometer then zero the dial bore gauge in the micrometer and use it for reference to see what the size of the bore is.

[Jafromobile]

@adamryanclark failed. I think I'm more distraught over losing the videos than I was when I broke the GSX. Silly, I know... but breaking the GSX just took 12 seconds, and losing the videos cost me almost 30 hours of work. More than anything I know they were awesome, and I really wanted to share them with you guys. I hope I can recreate them at least half as good as they were.

Time to put it all back together, and shoot it again.

[Jafromobile]

@adamryanclark Actually, my computer is on the workbench 4 hours away from finding out whether or not I need to put it back together and shoot it all again. I'm showcasing the "new" 6-bolt first so I don't have to explain the process while tearing the 7-bolt down.

Geek version: I learned that when you delete a symbolic link from a disk via. command line, it wipes out the reference but leaves the symbolic link in place.

Laymans' version:  I deleted it. Hopefully the utility I'm using works.