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96 geo metro crankshaft pulley bolt keeps snapping


krayziemike4202
11-10-2009, 07:41 PM
Why is the cranckshaft pulley bolt keep snaping on my 1996 geo metro? Ive replaced it once 1 yr ago and it snapped againg. :shakehead

doug2060
11-13-2009, 12:50 AM
Did you replace it with a new one or a used one. How tight are you putting it back on? I know it needs to be tight but no TOO tight! I used to have a bad habit of tightening bolts as tight as I could get them. The only good thing I got from that habit is now I am Jedi Master of removing broken bolts an re-threads...:lol:

krayziemike4202
11-15-2009, 01:08 PM
I replaced the factory bolt that snapped on me one day(I dont know why) with a brand new bolt and torqued at 200 lbs and was driving along one day and this one snapped also? ive replaced it again with another brand new bolt but is this common? and or why is it snapping?

Woodie83
11-16-2009, 06:10 AM
torqued at 200 lbs (SNIP) why is it snapping?

Umm, let's see.... because it's supposed to get 96 lbs/ft?

krayziemike4202
11-16-2009, 05:50 PM
Oh okay i found on another site it said 200lbs but is it common for these bolts to snap on geos?

Woodie83
11-16-2009, 06:38 PM
That came from the factory shop manual, a bolt or nut that requires 200 lbs/ft will usually be and inch and a half in diameter. The common thing for that bolt is to come loose allowing the timing belt sprocket behind it to wobble around, shearing the key. That's why they're LockTited from the factory. Maybe that's what you read, that somebody used 200 lbs/ft to get it loose. Most of that went to breaking the LockTite, not actually loosening the bolt. The highest torque of anything at all on a Metro is 129 for the front axle spindle nut in the center of the brake rotor.

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