How to install a Miata Crankshaft and Main Bearings
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- Опубліковано 30 лип 2018
- We are making some serious progress on the forged Hakuna Miata engine build. In this video I will show how to use plastigauge to check clearances on the crankshaft main bearings before finally installing the crankshaft. Then I will go over the process of gaping piston rings. The gaps we are using on this car are going to be wider than what a normal street application would require.
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If you are going to attempt this be sure to follow your factory service manual for your specific application.
Most of the procedures I perform on this build can apply to most general engine builds. Feel free to correct any discrepancies in the comments below.
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Time Stamps
00:49 What Plastigauge is used for
02:10 How to clean the engine block
04:45 I begin cleaning the block by removing the main caps
05:12 I found what I thought was a giant crack but it wasn't
05:50 I show how to clean the oil passages on the bearing surface
06:28 Coffee filter trick for cleaning bores
07:13 Inspecting my ACL bearings
09:05 Installing the engine main bearings on the block side
10:11 Cleaning the Crankshaft
12:08 Installing the Crankshaft
13:53 Mystery visitor shows up in the garage
14:08 How to use Plastigauge
14:58 How to install main bearings in the main caps
15:25 How to install the main caps on the block
16:23 Torque sequence for main caps
17:35 How to properly remove main caps
18:08 How to inspect the crushed Plastigauge clearances
19:48 How to remove the Plastigauge
20:08 How to clean and install the oil squirters
21:27 Final assembly of the crankshaft
22:33 Lubing up the main bearings
23:15 Thrust washer install
24:05 Main Cap install
24:38 How to lubricate main cap bolts
25:10 Final Torque sequence for crankshaft main bearings
26:09 How to check piston ring gap
27:28 Calculating ring gaps based on application for 1.6L Miatas (we had .020 over bore pistons that's why our bore was 3.090)
29:04 How to file piston rings without a piston ring filer
31:26 Checking our piston ring gaps after filing the piston rings
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Parts and tools
Standard size ACL Main bearings: amzn.to/2vdysh4
Standard Size ACL Rod bearings: amzn.to/2LW1jQE
Thrust washers: amzn.to/2AMRYX9
Pipe Cleaning brush set: amzn.to/2ACINbx
Brass/stainless brush set: amzn.to/2vf3mpl
Plastigauge: amzn.to/2vjVP8X
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Social Garage:
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Snap us @kyle00088
Tweet us / the_daily_drift
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Music Credits
Music Provided by Nicolai Heidlas
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![Lp. Последняя Реальность #107 РОДНОЙ ДОМ [Финал] • Майнкрафт](http://i.ytimg.com/vi/IK3QKzKUlHM/mqdefault.jpg)
Seen that hole in the 4th cylinder yesterday on my b61p and damn near had a heart attack, then I checked my other one and calmed down
you deserve way more views and I'm happy I found your channel you really gonna help me when I get my Miata. Keep it up.
For anyone wondering, around mid '96 Mazda changed the oil jets and omitted the copper washers
Thanks for taking the time to do this video. I thought my mains were a little on the loose side at .002 as they are supposed to be slightly tighter, but i see you had the same results as me!
Terrific quality and information. I'm in the process of doing the same job and this has been incredibly helpful!
Miguel Jimenez I’m just glad it helped ✌️
very good dude real, deal!!!!!!!!
drop of assembly lube on the thrust washer makes it easier
Great video quality and editing
Thanks, I can't tell ya how much that means to me 😅
This video needs more views man. So much time went into this video. Good stuff bro.
Thanks man, I really appreciate that 👍🏻
Good shit
Thanks, I'm gettin' it done slowly but surely, but damn this stuff takes forever 😂
Good job friend we had to tight of bearings and had to drag the car around the yard for 3hrs with no plugs in it 🤣🤣🤣
ouch that sounds like a PITA 😂
@@TheDailyDrift total worth the stress lol
Did you use the stock crankshaft that was in the motor or did you get a new one?
why are the thrust washers on that third cylinder?? random i thought they were on ends
Did you do anything about the groove that the rear main seal leaves? Or for the front seal as well? I’m at a stuck point because of these grooves.
Well it depends on how bad the groove is. I had my crank taken to a machine shop and they polished it and made sure it was in spec because I was trying to eliminate any possible issues. Usually if you can run the back of your finger nail on it and it doesn’t catch, it should be easy to wipe clean with a lint free cloth and some WD40 or oil. If it left an actual groove in the crankshaft, it might be worth getting it checked by a machine shop just in case it needs to be repolished. Most shops don’t charge a lot to do this and it’s good insurance.
I'm working on an NA 1.6L miata. Installing the main bearing caps, I know which way to face them, but is there a certain order they have to be in? the Miata Enthusiast's manual references a dot marking for their order, but my caps have no such markings. So maybe their order front to back isn't that important..
Sorry I just saw your comment. I can’t remember if mine had markings on the caps or not, but usually the caps do need to go in the exact spot they came out of. One way to mark them is with a metal stamp. I think they sell them on Amazon and it’s numbered 1-9 so you can mark the order by stamping them on the cap side. I know that’s not helpful if they are already out and mixed up but hopefully you were able to get it solved. Worst case scenario you could get a line hone at the machine shop and that should solve the issue.
what machine shop do you go to?
What the hell was that giant crack😭
It looked way worse than it actually was. It was a scratch in the coating. If I ran my fingernail across it, I couldn’t feel any lips or snags. If I had more time I could have returned them for a new set, but they worked out just fine 👍🏻