1998 Pontiac Grand Prix 1998 Pontiac Grand Prix engine nois

1998 PONTIAC GRAND PRIX
108,000 MILES • 6 CYL • FWD • AUTOMATIC
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MDRAGER
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My grand prix has a knocking sound coming from the engine and i can not figure out what it is. Any suggestions of what it may be? And how much it may cost to fix it?
Aug 7, 2010 at 11:53 AM
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MMPRINCE4000
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Does knocking increase with engine speed?
Aug 8, 2010 at 8:28 AM
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MDRAGER
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Yes it does.
Aug 8, 2010 at 10:36 AM
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MMPRINCE4000
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Generally a knock that increases with engine speed is a bearing (main/rod).

Change oil and drain into container, use a magnet to search for metal particles, if present, then engine will have to be replaced or new bearings, possible crankshaft/camshaft/rods will need to be replaced.

If you find particles, it would be far cheaper to replace engine with used one from junkyard.
Aug 9, 2010 at 7:40 AM
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MDRAGER
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thank you for the help.
Aug 9, 2010 at 11:31 AM
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MMPRINCE4000
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Good luck!
Aug 10, 2010 at 8:19 AM