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Symptoms of bad rod bearings?

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Old 11-08-2007, 03:00 AM
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Default Symptoms of bad rod bearings?

When i first start my car and its really cold my motor gets a sudden knock,for about 1 second(the first full rotate of the rotating assembly)then it is fine.Is that a sign of a rod bearing getting to the point of failure?I had plans to do acl bearings when i do my oil pan gasket but dang this just did it this morning.After that the car runs perfectly fine,other than a weird idle at some times.

Any ideas on what to do are appreciated.
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Old 11-08-2007, 03:30 AM
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Default Re: Symptoms of bad rod bearings?

that sounds more like a main bearing. what car/motor do you have?
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Old 11-08-2007, 08:48 AM
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Default Re: Symptoms of bad rod bearings?

its a d15b
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Old 11-08-2007, 09:18 AM
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Default Re: Symptoms of bad rod bearings?

you dont have racing mounts do ya? friends car makes a loud knock when he first fires it up,but its 100% from the mounts didnt do it till after we installed his az race mounts. hope its somthing like that.
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Old 11-08-2007, 09:25 AM
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Default Re: Symptoms of bad rod bearings?

+1 To mounts.
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Old 11-08-2007, 09:31 AM
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Default Re: Symptoms of bad rod bearings?

wow, if it made noise like that from the mounts, they suck. I've has solid mounts for YEARS with no noise. I haven't meet one person yet with "mount noise"
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Old 11-08-2007, 09:31 AM
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Default Re: Symptoms of bad rod bearings?

stock mounts and ya it only did it this morning,but i dont want anything happening to my motor so i want to take every pre-caution possible.
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Old 11-08-2007, 09:56 AM
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Default Re: Symptoms of bad rod bearings?

Originally Posted by Illegal
wow, if it made noise like that from the mounts, they suck. I've has solid mounts for YEARS with no noise. I haven't meet one person yet with "mount noise"
they suck??? WTF are you smoking...its cause the mounts are so fucking rock hard...lmao
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