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Old 11-08-2001, 02:56 PM   #1
PURE EPI
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Default Crankwalk???

can someone please explain what this means?
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Old 11-08-2001, 04:18 PM   #2
ColinL
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will never happen on a horizontally opposed engine.

try reading some DSM sites, they're very familiar with the problem especially the 2nd generation.
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Old 11-08-2001, 04:25 PM   #3
mrbell
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basically, int v and i engines the pistons want to push the crank out of the bottom of the block, but at different times during the rotation... eventually things can wear and the crank starts to walk or wobble and that's bad... since the H configuration pushes back and forth instead of down down down, we don't have that problem... also our cranks are much shorter(haha... I just realised how funny that sounds) so there even less chance of it happening...
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Old 11-08-2001, 04:30 PM   #4
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why did the 1st generation talons and eclipses (I had a talon) not have this problem???
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Old 11-08-2001, 04:46 PM   #5
bsquare
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Because the piston oil squirters on the 1G cars drew their oil from the main oil gallery, while the 2G car squirters drew their oil from the same source as the thrust bearing. These squirters had extremely high variability in their opening pressures, made worse by dirt and time, and they would start opening at idle oil pressure, starving the bearing of oil.


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Old 11-08-2001, 04:56 PM   #6
wRx14pSi
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basically its just that Mitsu manufactured cranks that are like a few millimeters short. Over time due to a few millmeters difference ,witht he crank spinning will cause wear on the bottom end of the engine. So basically the crank just dremels its way out of the housing Like slowly walking out of the housing. Hence the name "Crank walk".
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Old 11-08-2001, 05:17 PM   #7
PURE EPI
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Talking WHOO HOOO!!!

God bless the I-Club!!! an endless supply of knowledge!!!
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Old 11-08-2001, 06:09 PM   #8
bsquare
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Quote:
basically its just that Mitsu manufactured cranks that are like a few millimeters short.
I've never heard this, and it seems like engine builders would notice it quickly and use 1G cranks in 2G blocks (which they don't). Where did you hear it?


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Old 11-09-2001, 11:14 AM   #9
HondaH8er
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The problem wasn't just the crank difference, I think it also had to do with the block and/or bearing manufacuring problems. It's too bad, really, beacause those later gen, not the current model, Eclipses were really nice looking cars, but they only ran well when they didn't have problems, and that wasn't very often.
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Old 11-10-2001, 10:20 AM   #10
skeptik
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read about this awhile back on this page. here's an excerpt from one of the posts:

"Apparently, the factory had a bad run of CRANKSHAFTS, not bearings. The crankshafts were machined just slightly out of spec, and as a result the main center thrust bearing on the crankshaft wears prematurely. When this happens, the crankshaft will move or "walk" every time the clutch pedal is depressed. Some people have complained of difficulty in getting the car into gear (manual transmissions) and the diagnosis has been the same: a "walking" crankshaft. Well, it seems my crankshaft walked so much that it pushed the crank sprocket and the trigger plate forward and caused the trigger plate to come in contact with the crank sensor."

very sad story

mark
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