2002 Pontiac Grand Prix knocking at cold start

2002 PONTIAC GRAND PRIX
160,000 MILES • 6 CYL • FWD • AUTOMATIC
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2002GPSE
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At cold starts the engine knocks but then goes away after driving a few miles....what could rectify the problem. I have dont the intake manifold gasket twice so far. It was suggested installing a stonger oil pump may help.
Jul 14, 2010 at 5:56 PM
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RASMATAZ
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Oil could be too thin, weak oil pump or a lifter/s leakdown when it pumps up it vanish away till next start up.
Jul 14, 2010 at 6:00 PM
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