Rising temp on the Coquihalla

[Mad Max]

Ok so I have searched the site for ideas on over heating issues. I had already replaced the rad, water pump, etc. when I did the timing belt. The temp hasn't moved except when I was climbing the Coke. Finally gave in and turned on the heater fan with temp on high...in 40+ degree weather it wasn't fun...but it held the temp in check till we got to the top. My sense is this is a weak fan issue. Any hints out there on how to improve the fan effeciency on these units?

[delicat]

How high did it go? (past 3/4?) It's normal with your weather to go up even with all your new parts. It also depends how loaded you were. Do you have a re-cored copper 3 rows or the aluminum 4 rows radiator?

Also, is your fan working properly? Sometimes the clutch gives up... You could replace it with a electrical fan, it's been discussed here before and Sean did it on his.

Good luck!

[jessef]

After doing the rad pump etc...

Going up the coq just back off the throttle.

I averaged 80ish last time because my exhaust temps were through the roof.

Doing the coq three times in the Summer I just had to go slow.

3/4 temps and having to turn on the heater is unnecessary unless you're on the throttle too hard.

[sasquatch-hunter]

Try some Royal Purple Ice.

[Mephisto]

As jfarsang said, back off a bit to lower your EGTs. I just did the coke and my water temps barely went up and that's with the original rad, I just kept my EGTs around 1200*. It means you go a little slower, but, you won't be the vehicle at the side of the road with issues.

[lrp374]

Watching EGT's is the key. If you want a real test for your system try the Little Fort Hill when it's 35 C. It's longer and steeper. I was in 2nd. gear @ 3000 rpm's to keep control of the temperature.