Crankwalk cause

[Black99GST]

lol then i would expect it to not have walked yet with 0 miles...

[blk_srt]

I ment my end play is within specs :P

[SLoe]

Originally Posted by NOFX0617

From what I have read lately the 2g oil squirters suck...and get clogged really easily...or also the oil pump is clogged and you dont get enough oil pressure...have you read the write up on Magnus Motorsports...that was the most in depth article that I have read on the subject....here is the link... http://www.magnusmotorsports.com/tech/crankwalk.htm

That theory is not that the squirters get clogged(that would be fine), but that they get stuck open and lower oil pressure sufficiently. So when you are sitting at the light at idle with your foot on the clutch, all your oil is going to your squirters instead of your bearing surface and the pressure of the clutch on the flywheel causes the crank to ride against the bearing. So with low oil pressure at idle and pressure from disengaging the clutch you wear it down.

I believe the cranks are not hardened deeply enough, and if someone were to send one off to be nitrided, they would never experience "CW" again.

[blk_srt]

I know with my crank all the wear was on the bearing the crank had little to no damage and just got a polish and it was perfect

[SLoe]

Originally Posted by pr_ricer

I know with my crank all the wear was on the bearing the crank had little to no damage and just got a polish and it was perfect

UMMMMM.......Maybe I put that badly. You will not ruin the crank if it is nitrided, only the bearing, and/or block. My crank was totally ruined when I walked. Not just the bearing journals, but the crank was eaten up into the counterweight.


OOOPS!

[Talon69]

I have also read alot on the cranks not being hardend deep enough, calling them inferior. I have seen some cranks worn and not the thrust bearing.

[Mikelb]

Well, most would agree... crankwalk isn't caused by one problem; or it would have been found. The problem stems from multiple causes...

Someone needs to take and nitride their crank, remove/block the oil squirters, disable the clutch switch, replace the bearings (even upgrade them)... and drive the car... checking the tolerances at set intervals, say 3k, 6k, 15k, 30k, 60k, 100k, 120k, 150k... see if the car crankwalks... report the results... and if it works, everyone (w/a 2g) follow their recommendations... and voila...