Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk > Engine Tech

Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series.


Reply
 
Thread Tools Display Modes
Old 03-03-2018, 06:41 AM   #1
unicoder
Zilvia Member
 
unicoder's Avatar
 
Join Date: Apr 2017
Location: Alabama
Posts: 160
Trader Rating: (2)
unicoder is an unknown quantity at this point
Feedback Score: 2 reviews
Question Rebuild Question: Bearings

Question, I read that the KA24DE doesn't do bearings the typical way other engines do (my only build experience was a 4G63-T engine)

That you have to specifically buy each bearing based on numbers posted on the main cap, and same for rods.

However, when I watch KA builds on youtube, they just have a pack of bearings all the same size (like I would expect)

Can someone who has put one of these together reply here to enlighten me which way this works?
__________________

5.3 V8 Swap w/ Nitrous
unicoder is offline   Reply With Quote
Sponsored Links
Old 03-03-2018, 06:06 PM   #2
kyral
Zilvia Junkie
 
kyral's Avatar
 
Join Date: Nov 2012
Location: wisconsin
Age: 29
Posts: 447
Trader Rating: (7)
kyral is just really nicekyral is just really nicekyral is just really nicekyral is just really nicekyral is just really nicekyral is just really nicekyral is just really nicekyral is just really nicekyral is just really nice
Feedback Score: 7 reviews
they say your supposed to check the numbers on the block and crank and match them together to figure out what bearing to use. its really expensive to do so and nobody really does that

I did a cheap rebuild and just threw standards in it was low budget had no issues

when I did my second rebuild my machine shop told me to just use standard size bearings. have had no issues
__________________
The Game
you lose haha
kyral is offline   Reply With Quote
Old 03-25-2018, 05:42 PM   #3
Jrguzman
Leaky Injector
 
Join Date: Feb 2017
Location: Hayward
Age: 31
Posts: 56
Trader Rating: (0)
Jrguzman is an unknown quantity at this point
Feedback Score: 0 reviews
I am running standard bearings as well for my rebuilt ka24det. Also had the crankshaft journals polished. I would get some plastic gauge though to check clearances.
Jrguzman is offline   Reply With Quote
Old 03-25-2018, 06:34 PM   #4
brndck
Premium Member
 
brndck's Avatar
 
Join Date: Jun 2003
Location: torrance, ca
Age: 39
Posts: 12,407
Trader Rating: (129)
brndck is close to perfectionbrndck is close to perfectionbrndck is close to perfectionbrndck is close to perfectionbrndck is close to perfectionbrndck is close to perfectionbrndck is close to perfectionbrndck is close to perfectionbrndck is close to perfectionbrndck is close to perfectionbrndck is close to perfection
Feedback Score: 129 reviews
Send a message via AIM to brndck
Quote:
Originally Posted by kyral View Post
they say your supposed to check the numbers on the block and crank and match them together to figure out what bearing to use. its really expensive to do so and nobody really does that
totally not true. any decent machine shop or engine builder WILL check the clearances to make sure the correct size bearings are selected. anyone who skips this is asking for issues.

granted, MOST of the time, the size bearing that came out is the size bearing you will order and use.

BUT. why would you skip such a simple step, that can cause such massive headaches and wallet pains later on down the line???

do it right the first time, or do it twice.
__________________

http://outslidersandsmokeproduce.blogspot.com/
Quote:
Originally Posted by Mannykiller View Post
it'll fit JANK.. and no one likes Jank except Broke ass zilvians.
brndck is offline   Reply With Quote
Old 03-25-2018, 08:41 PM   #5
NiSilS14
Zilvia Junkie
 
Join Date: Sep 2003
Location: Denver, CO
Posts: 562
Trader Rating: (20)
NiSilS14 has a reputation beyond reputeNiSilS14 has a reputation beyond reputeNiSilS14 has a reputation beyond reputeNiSilS14 has a reputation beyond reputeNiSilS14 has a reputation beyond reputeNiSilS14 has a reputation beyond reputeNiSilS14 has a reputation beyond reputeNiSilS14 has a reputation beyond reputeNiSilS14 has a reputation beyond reputeNiSilS14 has a reputation beyond reputeNiSilS14 has a reputation beyond repute
Feedback Score: 20 reviews
Most 90s nissan engines used this method, and this only applies to factory bearings with factory set clearances. If you have the crank or the block remachined then they won't apply anymore. They are a set of 4 numbers and a set of 5 numbers on the block and numbers on the crank, each corresponding with rod and main journals. For ka24de, the numbers 0,1,2 are used. The numbers are added to give you which "grade" bearing to use for that specific journal. for example, if the crank reads, 1111 / 11111 and the block is 0000 / 00000. those numbers would add up to use grade 1 bearings. there is total of 4 different grades of bearings.
__________________
@adamcs14
NiSilS14 is offline   Reply With Quote
Old 03-26-2018, 01:57 PM   #6
kyral
Zilvia Junkie
 
kyral's Avatar
 
Join Date: Nov 2012
Location: wisconsin
Age: 29
Posts: 447
Trader Rating: (7)
kyral is just really nicekyral is just really nicekyral is just really nicekyral is just really nicekyral is just really nicekyral is just really nicekyral is just really nicekyral is just really nicekyral is just really nice
Feedback Score: 7 reviews
Quote:
Originally Posted by brndck View Post
totally not true. any decent machine shop or engine builder WILL check the clearances to make sure the correct size bearings are selected. anyone who skips this is asking for issues.

granted, MOST of the time, the size bearing that came out is the size bearing you will order and use.

BUT. why would you skip such a simple step, that can cause such massive headaches and wallet pains later on down the line???

do it right the first time, or do it twice.
Actually VERY true. clevite, ACL, KING, they do not offer bearings like that. they offer them in stardard and oversized. most ppl have their machine shop measure their clearances and let them know which direction they need to go.
very few ppl go with oem Nissan bearings (they are good bearings though)

If you don't use the machine shop then plastigauge is gonna be your best friend. Youll likely have no issues running standard bearings but like I said just plastigauge it if youre not doing any machining

regardless of which direction you go, after you install the crank check to make sure it spins freely. then each piston you install check and make sure it spins freely (once the pistons start going in expect there to be a little extra resistance every half turn, this is normal and is caused by the pistons sliding through the bores and the resistance should free up when they get around TDC and BDC. then you should feel the resistance again as they leave TDC and BDC)
__________________
The Game
you lose haha
kyral is offline   Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 10:36 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
vB.Sponsors
Copyright © 1998 - 2019, Zilvia.net™