[billg226]

I have a 97 Lumina LS with the 3.1 L engine of 114,000 miles. In past 2 weeks it has starting ticking (sounds like under both Head covers) when 1st cranked. After Temp. guage gets between cold & half-way mark, it quits ticking & runs like new. No oil loss, clean exhaust also. Still using same 5w30 oil as always used, Havoline, and change every 3,000 miles.
Have tried STP, seemed to stop for a few days but started again today. See no bubbles on dipstick that may indicate coolant in oil. Use Dex-Cool as recommended.

Any suggestions/solutions.
Thanks,
Bill