I have never seen this one before.There is no boil over or bubbling sounds; there is no sign of any problem, other than the temp. gauge slowly rising. I have bled the sys. over and over.I even lifted the left side to raise the tank higher than the motor, and bled the sys.; Watching the scanner, the temp. will go slowly as high as 247 F. Here is the strange part; if i turn the heater fan on full blast, the temp. will go right back down! Also, when the temp is high, the rad. fans are on full blast, but the water does not seem to be circulating through the rad.( fans are sucking cold air out of rad.). Has anyone seen this?

Related Repair History
aftermarket Thermostat replaced by me, and appeared to have been recently replaced before being traded in!

Updated on 1/4/2009
I pulled the water pump, and guess what; someone had already replaced it! Every step I have made on this, someone has already been there.I failed to mention, that I was bleeding out the air with the car jacked up on the left side, with the rad. cap off, and got the thermostat to open; when it did, there was hot water flow all across the rad (lazer pointed temp. gun). At that time, I put it all back together, and drove it, and then slowly the temp started to rise again. When I got back to the garage, the temp read 247; with the gun it read no hotter than 180 anywhere. The hose at the thermostat was farly cool; it acts like some have said, that there may be a blockage at the left head passage to the thermostat area; that will be my next attack. Also to add; there is no coolant loss, or leak; the coolant looks clear, although it may have been changed. Thanks for all the replys; I how this helps narrow down my problem. I'll update tomorrow after more diag.!

FIX posted 1/11/2009

Denny from Pennsylvania

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