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Old 01-05-2018, 01:33 PM   #3
acammer
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Drives: 2011 Camaro 2SS SGM
Join Date: Jul 2016
Location: Weedsport, NY
Posts: 2,199
Agree - sounds like air.

It's real easy to change the thermostat yourself - drain the coolant, pop the thermostat housing, and replace. Very minimal if any coolant loss that way - you can catch it all with a rag. Then fill it up till full, run the engine, let it push out the air, keep filling, once the temp comes up cap it off and you're set.
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2011 2SS SGM - CAI, PTB, Rod-Mod and ported intake, GPI SS3 cam, AR LTs 1.875", X-pipe, high flow cats, cutouts. 25% UPD, 169*F stat, Ideal Garage clutch master and reservoir, Tilton 6100 HRB, Mcleod RXT, Yukon 4.11 gears, TruTrac Differential, LPW Diff Cover, BMR Pro diff bushings, Pegasus Solid rear sub-frame bushings. 497rwhp. 11.67@119 2+ton raceweight.
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