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ORIGINAL: EViLLSeViLLe98

i own a 98 Seville SLS with 118,000 miles on it, i just purchased this car and it seems to run great, put new plugs and wires new front hubs, brakes, rack and pinion, egr valve, and fuel filter on since owning it for 1 month!! so i have quite a bit into it so far about 2500 in new parts, anyways my new problem is im losing a small amount of coolant about 2 inches every 3-4 days, i didnt have this problem prior to using Seafoam in through my brake booster, i also cleaned the throttle body with seafoam and toothbrush, i have no white residue in oil and like i said it runs awesome, im wondering anyone has had a problem with intake gaskets going bad after seafoam? and if that carbon might have been holding my gaskets together in the first place, i also was underneath the car and could hear sizzle in catylact convertor so i hit it lightly and sounded like alot of moisture in it, i am getting white smoke now out thee exhaust, could that be caused by coolant getting through intake gaskets? are the seafoam and coolant loss connected and if so would flush and GM P/N 3634621 Tabs fix the problem??  i could really use some input!!!!
 
Help my EviLLeSeViLLe!!!!!!!!!!!!