1995 Pontiac Grand Prix oil leak

1995 PONTIAC GRAND PRIX
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ANTON74
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Engine Mechanical problem
1995 Pontiac Grand Prix 6 cyl Front Wheel Drive Automatic 100K miles

Hello,
My 95 GP SE (3.1l V6) with slightly more than 100K miles is starting to use or leak the engine oil. There is a sludge on the rear corner of passenger side of the engine, where the lower intake manifold meets the head. Also, I added about one quart of oil since the last oil change (about 3 months or 3750 - 4000 miles ago). It is not a lower intake manifold gasket, since I changed it recently. The vehicle runs great. Where the leak came from? Head gasket? Timing chain cover gasket?
Thanks,
Anton.
Nov 21, 2009 at 4:26 PM
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MMPRINCE4000
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Check valve cover gasket, run compression test for head gasket.
Nov 22, 2009 at 7:39 AM