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Old 02-03-2009, 03:31 PM   #1
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Default Threw a Rod at 75k Mi.

So what went wrong?

I bought my 02 Bonneville SSEI in July of 08. she had 73k miles on it. right after i purchased i needed to replace the LIM (common problem). I also had the Cat replaced it was bad before i purchased the car. All was fine until a few days ago when the idle started going up and down slightly and would stall, in gear when stopped. at the same time a heard a knock under acceleration. I drove about 10 miles to the Pontiac Dealer. There diagnosis was i have a ROD KNOCK. I picked up from dealer, driving to a Mechanic for a 2nd opinion and the ROD let go.

I know these cars have there problems. I can can accept that... But...... Throwing a Connecting Rod at 75k Miles?????

I suspect the car was abused before i purchased and perhaps had a a rod knock and someone dropped the pan and threw a bearing in just to get rid of it.

PS... I never ran it low on oil. The oil had been changed just before i purchased. i have only put 2000 miles on this car since i bought it
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Old 02-03-2009, 03:51 PM   #2
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I can't say I have heard of any engines throwing a rod under normal driving. Anything can happen I guess, but that'* not a common problem in these engines. LIM gasket yes, head gaskets and rods, not so much. Can you tell if any work was done before you bought the car?
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Old 02-03-2009, 04:51 PM   #3
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The car seemed to be completely stock an unmolested.
I had it towed to the repair shop today. i'm gonna ask him to see if there are any signs that the oil pan had been removed previously
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