4g63 blow-up-a-thon

[deth2u]

I don't wanna beat a dead horse but...

I went to the mitsubishi dealer to pick up some sterling silver touchup paint and started to paint my car right in front of the service center when one of the techs walked up and recognized me from last time when he drilled my headlights (another one of mitsu's fine service bulliteins they #@%#@%#@%#@% up on and don't fess up to--condensation on 3g) and we started talking. I told him of my intentions of buying a GSX and asked him about crankwalk. He told me honestly they had a few 2g's come in with walked motors (last time i was there 2 eclipses were getting new motors at the same time )
He went on to tell me that all the guys that came in had overpowering heavy duty clutches. Both cars were driven hard...one was riced out and the other had a huge tach on the inside and vinyl HONDA EATER stickers on the windows. (I'm pretty sure i might have seen that guy on these forums somewhere...) Back to the point, the tech guy was pretty sure that powershifting is to blame for the walking engines. Likewise, a few people on this forum feel that auto trannies are less likely to walk

Do you buy a fast car to drive the speed limit? I think not. Anyone believe this theory might hold ground?

 

[got traction?]

Powershifting causing crank walk? never let that tech look at anything on your car.

 

[deth2u]

if you talk a look at the clutchmasters ad, they even say heavy clutches can risk crankwalk

 

[Grimace]

magnus performance has an excelent theory on crankwalk! they are located in toronto about 2 hours form my house and knwo there stuff you should all read it

 

[deth2u]

Originally posted by Grimace
magnus performance has an excelent theory on crankwalk! they are located in toronto about 2 hours form my house and knwo there stuff you should all read it

Read it. They had some theroy with oil squirter discrepencies, but I still think that if you bite hard on the crank/flywheel a lot, it'll walk on the bearings

Just trying to start a discussion of possibilities

 

[taylorspl]

Originally posted by deth2u
Back to the point, the tech guy was pretty sure that powershifting is to blame for the walking engines. Likewise, a few people on this forum feel that auto trannies are less likely to walk

Do you buy a fast car to drive the speed limit? I think not. Anyone believe this theory might hold ground?

Technically any brand motor can crankwalk for some magical reason it just happens to mitsu's more...hmm...A heavier pressure plate CAN add to the problem and make a motor that was going to walk walk faster.

Yes I bought a quick car to make it faster and get to the speed limit quickly, and sometimes a little over. I think you would be surprised at the number of people who post on this board who do not excessivly speed or street race.

 

[nine5raptor]

My thoughts on the whole CW thing are it comes down to pedal pressure...or at least the pressure needed to push in the fingers on the PP...that is the only time you are applying a lateral thrust to the bearings. CW should be less of a prob if you always put it in neutral at stoplights and don't 'stand' on the clutch pedal the whole time.
just my thoughts

 

[LaserRST]

I may be wrong but I thought crankwalk was caused by a mistake in the clearances of the crank to the block mains. This was done via metallurgy or machining I dont remember which. Any way... I am posting this cuz so far I have only heard about CW in 2g DSMs and no other in any tuner class car. Sooooo... technically it places the blame soley on a defective crank rather than the clutch, wouldnt ya think?! High out put cars are designed to handle high loads, which brings me to my conclusion that CW=defect. This is not any new news but im posting for what its worth....

 

[nine5raptor]

the tolerances are too lax and pushing in on the harder clutch pushes the crank farther out that it was meant to go, thus causing problems...if the tolerances were tight, the crank wouldn't be able to move so much and a strong clutch wouldn't be a prob. I've heard of CW in all years of the 7 bolts just a lot more frequent in the 2G's

 

[megaspeed7]

For any of you 2g guys with big clutches I recommend rewiring the clutch engaged starter safety switch (ie the thing that makes you have to have clutch on floor to start car). I beleive it is on the pedal assly so check it out. Crank walk is most preminent in low oil pressure situations, so DON'T start the car (no oil pressure on start) with the clutch pushing on the crank. And you have to do it this way with the stock switch there.

 

[RetardedAWD]

Yep I agree.. think about all the pressure of an aftermarket clutch (or even a stock one for that matter) if there was a slight flaw from the manufacture than this would aggrevate the CW situation. It just wears each time you start the car or have a shitty low pressure oil pump with your foot mashed on the clutch at every stop sign/light...
It makes sense.. or it could be a combination of the oil squirter being stuck open and starving bears etc.. it could be caused by a number of things or a number of combos of each..
the best thing to do to prevent CW is to eliminate every possible cause or combination. If your oil pressure is low get a new pump... if you have not rewired the clutch switch do it. Run a oil filter with anti-drain back valve etc etc etc..

 

[taylorspl]

I was gonna say that for every modded DSM that gets CW there is at least 1 100% bone stock DSM that gets CW.

With that being said...
Helpful tips to avoid CW:
1. Unplug clutch pedal switch.
2. Don't sit at stoplights(at idle) with the clutch depressed the entire time.
3. Keep an eye on your oil pressure

Oh yea and feel free to add more, I'm leaving for work so I don't have time to go checking my bookmarks for tips.

 

[dave99gst]

#4 : if you cant afford it , or are that worried about CW - leave the car alone and dont f*** with it

 

[insane147]

ever wonder why alot of people make damn sure they get the metal throw out bearings instead of the plastic ones when using the gorilla clutches? thats the other component taking the stress of the pressure plate besides the thrust bearing, and still it fails.

 

[DSMJim]

There are also guys out there who have bone stock cars that drive the car easy, disabled the clutch to start thing, dont hold the clutch at stop lights etc etc and still got crank walk in their cars. I was reading a post about CW and there were at least 300 replys of people saying they got it and about 10-15 were guys with totally stock cars.

There were even guys with 6 bolts that got crank walk.

On the other hand, there are guys out there who beat the crap outta their cars and have ACT 2600 lbs clutches etcetc and never see CW ever. Pretty well seems like luck of the draw. Some believe that every 7 bolt will get CW eventually sorta like death and taxes, your gonna get em regardless. I have also heard numbers like 25% of 7 bolt cars out there have had CW and that 10% of the cars running right now have CW and the owner doesn't know it yet cause they have never checked the tolorance on the pully etc etc..

dunno what to make of all this, but to hell with it. im putting on a bit turbo and spray and an act 2100. if I get CW then i'll pop in a 6 bolth and be down with it. you gotta pay to play

 

[larryd]

if your car is out to get you, its gonna get you.. stock or modded.. it doesnt much matter.

 

[taylorspl]

Originally posted by larryd
if your car is out to get you, its gonna get you.. stock or modded.. it doesnt much matter.

So freakin true!