Blueprint 105 - Main Bearing Oil Clearances

[bsivoljr]

Dude your build vids are sick. High Def. Articulate. Awesome tools. All your missing is a nice beverage :) Preferably Vodka. Haha. On a side note "Axixisisisis" :D lolo

[rcfirdy]

Just a little tip when setting up your dial bore guage in the micrometer.Do not place your fingers on the anvil or the spindle.The body heat that is conducted into these components of the micrometer cause them to grow,reducing the measurement.That also applies to the frame of the micrometer.High quality micrometers will have a insulating pad from which the instrument should be held.Happy Blueprinting. :-)

[mazzmari]

Great videos, fantastic series.

[wwjoshdew]

you amaze me... you simply amaze me. While I didn't watch the whole 10 minutes (because I was so lost) I still enjoyed the video!

[380gb]

Great video. i love this series. Ive already learned a-lot

[tonkpils707]

do those bolts stretch after torque?

[Jafromobile]

@tonkpils707 They sure do! Factory bolts all stretch. So do ARP's but they're more resilient than factory bolts.  I'm not using these again, I'm replacing them with ARP studs... so I don't care what their spec is... but you should measure them all to ensure they're in-spec if you're trying to re-use them. I can't find a spec in the Haynes manual, so I'd measure them against one another and look for a long one to replace.

[watchforfinger]

jaf what are those things at 8:20 sec in the bores that look like injectors of some sort ?

[Jafromobile]

@watchforfinger Great question! Factory turbo 4g63 engines (6&7 bolt) all have oil squirters drilled into the main galleries. Their purpose is to deliver extra oil, aside from what the rod cavities provide to the wrist pins of the skirts & pistons... they just hose everything down from the back side.

The theory is the turbo engines achieve much higher final compression, and therefore, heat. Supposedly they cool things down and prevent oil from coking on the pistons.

I like 'em. Some don't.

[watchforfinger]

@Jafromobile thanks for the explanationisisisisiss

[Jafromobile]

@watchforfinger LOL!

[nils001]

wow this is so technical it makes my head spin

[Jafromobile]

@nils001 That's what happen when we get into the 105 part of the series. The topics get much more in-depth.

This part isn't so bad. It's just subtraction. You measure the peg and the hole. The gap left over is the oil clearance. The tools are complicated only so the process doesn't have to be. ;)

[nils001]

@Jafromobile: well, i understand what you are doing, just don't understand all the words/part names, since english isn't my native language. Very interesting tho.

[mbopm]

For example on your main 1, its .0059-.0032=.0027'' oil clearance?

[Jafromobile]

@mbopm Actually, .0032" (Y) is the oil clearance. The reason I'm taking the X measurement is just to compare them against each other. The Y measurement is the oil clearance unless for some reason X is horribly out-of spec. The 2 measurements I wrote down are just the high and lows. The low spec is the one to go by. A significant variance on the high spec would be a problem. You don't need to do any math with the high and low specs aside from ensuring they're all close to the same result.

[mbopm]

Hell yea way better than the evans tuning video,

[iconone5]

Lucy is such a whore. Lol thumbs up.

[Jafromobile]

@iconone5 She's serviced far more cars than I've owned, that's for sure!

[theboxmodder]

Love it. Keep em' coming. BTW, I've got idle sorted with the battery swap. Trying to find the time to make a slideshow video. Once I got the voltage to sit at around 14 I set the fuel pressure to what we talked about. Reset deadtime and I'm golden. Thanks a lot.

[aleks138]

great vids. What brand dial bore gauge is that?

[Jafromobile]

@aleks138 It's a Stef's B&B Dial Bore Gauge kit from 2-6". If you want specific part numbers for your search, it's in the Blueprint 101 video. There are close-ups and the part number is on the lower-right corner of the top of the box. :)

[srburner]

You are the men! keep them coming, love this videos!

[bradikus7]

I have watched all of your videos Jafro, and I love them. I just hate waiting a week for the next installment lol. I've been pretty concerned with spending the $3,000+ on parts to build my engine and assembling it myself. Your videos make me a bit more confident though. Keep it up man, we all appreciate your videos!

[Jafromobile]

@bradikus7 I used to be able to shoot a video and upload it the same night back when I just had a DV cam. Now that I'm 1080HD, production time is more than 10x as long while the file sizes are purely ridiculous! It seems all people do on 240p videos these days is complain about their resolution and what kind of vegetable was used to capture them, so I'm very happy to use this format despite it's inconveniences. The biggest one being–HD has drastically impeded my productivity in the garage.

[AllRepair]

first like? wtf?