crank walk...

[viper5965]

hai to all evo owner..:wavey:
i just wanna to share about who have experience with crank walk problem..
what i hear,percentage evo 4 got this problem too high..
can another evo`s got crank walk problem like evo 4?
can we prevent from this cases occur?
why this happen?

 

[chocolatesttarfish]

bro i'm noob as well..what's crank walk?

 

[lan evo]

most of the crankwalk case was on the e4 engine.read alot bout it when i owning evo4.

u can search for more info here

lancerregister.com

 

[jameswwt]

Here's the link :
Crank walk - Mitsubishi Lancer Register Forum

 

[viper5965]

bro i'm noob as well..what's crank walk?

that mean ur crank shaft move forward n backward during u push n release clutch padel..
it will become ur main bearing n crank getting worse, a lot of damage will be coming if late to detect..

---------- Post added at 12:40 AM ---------- 6 hour anti-bump limit - Previous post was at 12:25 AM ----------

ermm..no preventing.:hmmmm:
that is call factory fault is it?
just change evo5 engine block onward the problem have been gone..

 

[chocolatesttarfish]

how do u know ur crankshaft is moving? any particular sound or did u feel any vibrations when u push/release ur clutch?

thanks for highlighting this..

 

[H22-C]

technically, any engine can suffer from crank walk.

some ppl say evo4 suffer more from crankwalk because the starving of engine oil in the bearing under certain condition due to the design of oil gallery/channel in the bearing.

evo5 onwards different design bearing, so less crank walk happens.

however, above theory is not proven.

 

[DewA_LavaU]

hmm sumthing new I learn today. thanks for sharing :)

 

[azizi.aziz]

sounds like...metal to metal knocking..."TOK...TOK...TOK..." fast beat ~ every 0.5s...very loud...it's NOT like the tappet sound where your rocker bullet (some say hydraulic lifter) worn out..

 

[viper5965]

technically, any engine can suffer from crank walk.

some ppl say evo4 suffer more from crankwalk because the starving of engine oil in the bearing under certain condition due to the design of oil gallery/channel in the bearing.

evo5 onwards different design bearing, so less crank walk happens.

however, above theory is not proven.

yeah,the technically is the design like H22-C told..

but wat i survey who used the racing clutch in everyday street user the possibility crank walk will be occur (ex: 3 puck excedy single plate completed, that clutch is heavy too push the padel)
i not blame that clutch coz i used it 2 yr until this happen to me and also my 3 friends who used it..
(that clucth was amazing for me,myb for drag or sometime used is ok but street user not recommendate)

---------- Post added at 03:45 PM ---------- 6 hour anti-bump limit - Previous post was at 03:42 PM ----------

sounds like...metal to metal knocking..."TOK...TOK...TOK..." fast beat ~ every 0.5s...very loud...it's NOT like the tappet sound where your rocker bullet (some say hydraulic lifter) worn out..

yeah..
+ ur rpm will be drop also when ur push clutch padel.

 

[chocolatesttarfish]

dammit i just changed to ogura super single..

 

[H22-C]

the best recommended solution (but not proven) is if your evo4 suffers from crank walk, replace it with evo5 engine.

how to confirm your engine is from evo4 or evo5 ... here :

Post Your Engine Number Prefix Here Please - Mitsubishi Lancer Register Forum

engine number:

EVO I: MX

EVO II: OP, QV

EVO III/IV: TB, TE, TF, TG, TH, TJ, TK, TM, TN, TR, TS

EVO V: XG, XJ, XK, XL, XM, XN, XO, XP, XQ, XS, XU

EVO VI: AA, AB, AC, AL, AN, AO, AP, AQ, YN, YR, YS, YT, YX

EVO VI TME: BB, BG, BK, BL, BM

EVO VII: CS, CT, CX, DA, DB, DK, DN, GL, GN, KD

EVO VIII 260: HY (USA), JX, KL, KO, KQ

EVO VIII: HM, HP, HQ, HT, JC, KS

EVO VIII MR: KA, KB, KD, KH, KK

EVO IX: LB, LD, LG, LJ, NB (USA),

EVO IX GT: LA, MN

EVO X: 4B

 

[DewA_LavaU]

thanks for sharing H-22C bro :) long time no see~ miss u bro~ :P