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Coolant temp questions

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by SEMiller, Dec 4, 2013.

  1. SEMiller

    SEMiller New Member

    Several months ago I started having a slow lower radiator hose leak and my mechanic said it could wait repair until the winter, so long as I occasionally topped of the coolant, which I did. I recently changed the hose and had a coolant flush as well. I have an ultragauge and before the hose change and flush my temp ran between 210-230 and after it is between 190-195. My 2 questions are is that normal and did I do any damage to my motor by running it warm for a few months.
  2. TRPLXL2

    TRPLXL2 Epic Member 5+ Years 1000 Posts Platinum Contributor

    Ls engines come standard with a 195 thermostat, so you are running perfect now.
  3. redvett

    redvett Member

    "LS" trucks came OEM with 187F stat not 195F.
  4. j cat

    j cat Rockstar 4 Years 1000 Posts

    the reason you ran at the above normal temp was because you had a leak. your mechanic is not too smart ....

    any leaks must be stopped quickly , with no pressure the coolant will boil and the water pump pumps water not air bubbles. also air bubbles doe not conduct heat very well. by delaying the hose/leak repair you did some damage to the engine. perhaps not enough to notice..

    any time you see that temp wander you have a leak ..the temp should lock in at the 195-200 deg f mark.

    if it is very cold below 20 deg f it may with the heater on max drop to 190 deg f.
  5. summitwhite11

    summitwhite11 Member 1 Year 100 Posts

    Never allow a leak to linger on, nothing good will come from that, ever...I would find a new mechanic, your seems to have a leak.
  6. Pikey

    Pikey Moderator Staff Member 3 Years ROTM Winner 1000 Posts

    Agree 100%/ Find a new mechanic. that hose should have been changed asap.
  7. SEMiller

    SEMiller New Member

    Leak repaired, coolant flush done as I noted in my original post. The question was what damage to the motor could I have done by running between 210-230 (mostly around 210 but occasionally crept up to about 230).Hopefully the damage if any was slight as noted above. Everything seems to be fine now.
  8. j cat

    j cat Rockstar 4 Years 1000 Posts

    the tranny fluid gets damaged from the higher temps.. drop the pan clean and replace fluid / filter...
  9. SEMiller

    SEMiller New Member

    Will do, thanks for that advice.

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