1997 buick crank


Old 12-23-09, 04:35 PM
Thread Starter
Join Date: Dec 2009
Location: georgia
Posts: 2
1997 buick crank

Hello, got a weird problem with 97 buick lasabre. I can turn the Harmonic balancer bolt and get pistons and flexplate to rotate, but the starter will turn the flexplate and pistons but not the Harmonic Balancer Bolt. Think maybe my crank is broken but I cannot understand why I can the entire crank from the HB bolt only. Help
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Old 12-23-09, 06:55 PM
Join Date: Jan 2006
Location: Owen Sound Ontario Canada
Posts: 541
I take it that its a 3.8
Infamous for balancers breaking.
I would take the balancer off and go from there.
Old 12-23-09, 08:16 PM
Thread Starter
Join Date: Dec 2009
Location: georgia
Posts: 2
I took off the balance and when I rotate the reinstalled bolt the cylinders rotate but when I crank the starter I can feel the bolt attempt to move but it kind of slips, could I have broken the crank and still drove the car to park?
Old 12-24-09, 07:37 AM
Join Date: Jan 2007
Location: North Central Indiana
Posts: 905

I have had vehicles driven in to my shop with a broken crank. Made quite a bit of noise tho.
Old 12-24-09, 12:23 PM
Join Date: Mar 2006
Location: USA
Posts: 269
Probable broken crankshaft. I have seen this very thing happen but usually with some abnormal noise.

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