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Old 05-18-2015, 08:21 PM   #1
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Default Camshaft

I own a 98 Pontiac grand prix with a 3.1 the camshaft as broken in half I removed it and was wondering what causes it to crack??
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Old 05-18-2015, 11:14 PM   #2
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Was any major engine work, previously done to engine?

Engine abused, over revved?

Poor lubrication causing cam bearing failure?

Rare for a cast cam to fail on it'* own.....

You will have other problems......if one part of the cam moved and the rest didn't, could have bent valve, bent push rod, piston damage, head damage, etc.

Need to check timing chain and sprockets.....
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Old 05-18-2015, 11:29 PM   #3
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Default 98 Pontiac grand prix

Have check heads no bent values but cam has some groves in one Bering
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Old 05-19-2015, 06:21 AM   #4
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Grooves in a bearing could mean failure somewhere else. With it being a 98, I'd recommend a full rebuild. Gaskets and new bearings and rings.
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Old 05-19-2015, 11:29 PM   #5
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Plenty of 3.1'* available in junkyards....
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Old 05-20-2015, 06:12 AM   #6
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Plenty of 3.1'* available in junkyards....
That too.
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