I will try to explain what I feel about the fans (not trying to be smart, just present what I feel ).

1.If a cooling system would be "underpowered", I would ALWAYS overheat , not only time to time for a short period of time and do not overheat while mashing her at 95F.

2.the fans play a major rolle in situations, where the car does NOT move fast enough to flow enough air trought the radiator. So I would be overheating in stop&go traffic right? I do not..

3. at 60mh, there is enough air traveling trough the radiator, so how can a "underpowered" fan be the reason for overheating? And I talk about vacuum driving, so the turbo does not contribute to the overall heat at all, does it?

The fans switch on earlier and even when we conected them to "ALWAYS ON", the car did overheat while cruising.
The stock fans are able to cool her down to 180-190F in a few minutes while idling btw.

My question is, does a TURBO increase coolant temperatures even while no boost cruising since the coolant flows trough it anyway?

Does air in the coolant cause this type of overheating? Still did not find the second bleader...

 

I'm no expert, but intermittant overheating would have me thinking air in system, or faulty thermostat.

 

where t.f. is the second bleader?

 

There is an aluminum tubing attached to the firewall that carries coolant. There is a rubber plug attached with a clamp. The plug is actually like a blocked off piece of rubber tubing. That is the high point in the system.

After you get the air out if it does it again you may need a new thermostat.

 

when I had this same problem, turned out to be no other then my head gasket gone bad, sorry to be the bearer of bad news, but I had this same exact situation happen to me, on and off, and I bledthe crap out of the system like a million times and no success. You may want to try some water wetter from redline, see if that helps any. But if its on and off like that, same symptoms as my car. check for bubling in your overflow tank, and see if your system is pressurizing.

 

thanks for the info.the thermostat is new, it was installed with the turbo so I hope it's fine.It's Spoon and idles at the advertised 180F(82c).

it takes good 10-15 minutes of stable 90mph 5000rpm cruising to bring her to 215F. A/Fs are mid 13s, is that too lean for non-boost low load cruising?how hot should a turbo car run?while I drive in normal conditions she runs at exactly 195F and idles at 180F.

any more ideas?