1992 Saab 9000 how come

1992 SAAB 9000
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JAY10E
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Engine Cooling problem
1992 Saab 9000 4 cyl Two Wheel Drive Manual

ok i have changed the thermost, water pump gasket, back flush the riadiader put new hoses on this thing and ill be drivin down the road all of a sudden it will be overheating then all of a sudden the temp gage flies down to cold then back up to hot agian and so on. also i change the cap to. if you all can help me out that would be so much
Jan 5, 2009 at 3:26 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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DOCFIXIT
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Any chance thermostat is in backwards? spring points to engine
Jan 5, 2009 at 3:33 PM
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JAY10E
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that was the first thing i that thought of so i checked that it was fine. anything else u think it might be
Jan 5, 2009 at 3:56 PM
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DOCFIXIT
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May have air in system is there a bleeder ? if not pull cap jack up front of car run till all air out.
Jan 5, 2009 at 4:00 PM