Quote Originally Posted by VX KAT View Post
My test run today was kind of inconclusive....

  • Normal with full A/C all the way down, 80 miles at 70-75mph, air temp 104, full sun, in Phoenix.
  • City driving, stop/go, for about 20 minutes ->normal
  • Turned off while in restaurant 45 mins
  • Sat in car 5 mins, full A/C full, waiting for steering wheel to cool down --> Normal
  • Minutes later, driving around shopping center slowly --> Started to go up, between 70-75% of dial.
  • Continued slower city driving a few miles, --> Stayed around 70%-75%
  • Stopped for 25 mins, engine off
  • Started up and was at 65%
  • Freeway at 65mph for a few miles --> Normal
  • Stopped for 30 mins, engine off
  • Started up and was at 65%
  • Highway for 80 miles, 65mph --> Normal within a few mins
  • Climbing the steep elevation part of route--> Normal for 2/3 of 4 miles
  • Went up to 65%
  • Returned to normal remainder of highway drive
  • Full A/C, coldest setting, entire trip


IMPRESSION-
  • It didn't act inconsistent like last trip....it went up when you expect it could/would.
  • Didn't go as high as last trip, despite higher air temp and more city/slow driving


Thoughts?? New fan clutch, fan blade, and new thermostat...did they help?
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Sorry I missed this thread & your question Sue. I may have mentioned before on an earlier thread but an OEM fan clutch with the original fan blade fixed my over heating issues. My engine temp acted exactly like yours until last April when I picked up an OEM fan clutch. I was cranking the A/C on Cliff Hanger while you were on Top of The World and my temp never moved from the normal operating temp.

I previously tried several aftermarket fan clutches, electric fan, & the coolant temp sensor Wintermute mentioned (agree it's very easy & cheap to replace).

My suggestion... try running your new OEM fan clutch with the original fan blades. You should be able to hear the fan slighlty more than the engine during accleration -at least that's how my setup sounds.