Car Overheating

[R34Liner]

hay guys and gals

Well last night I was on the Thursday night cruise going down old pac, some of you might have remembered me winging about this when we stopped, and I looked down at my Temp Gauge and it was just under the 2 dashes at the top of the gauge that mean "hay, I’m f***ing HOT!", I was sitting on some high revs on the inclines, but I have done old pac a million times and I don’t think I have ever seen the gauge go up so high.

My theories are

a) it always goes that high but I'm always concentrating on the road that I have never noticed (and therefore my question is, should my temp gauge fluctuate that much at high revs?...or is this really a problem?)

b) my thermo stat isn’t opening up at high temps or only opening up slightly (but in saying that, once I slow down and let it cruise at low revs, 2 grand, it cools down fairly quickly (travelling at about 80kms) which means that the radiator is doing its job....right?)

c) I need new coolant? (but my mec said that shouldn’t really make a diff) I’m soo confused :S

d)air pocket? (but what’s the likely hood of that? and if so, why would it happen?)

Now, after taking it easy and letting the engine cool down to normal, I continued down old pac, not as hard as I had been, but still fairly hard to see if I could get the temp up again but I had no problems......

I don’t know what to doo!!

help

[J34]

What sort of setup are you running?

Your coolant temp would probly rise a little doing old pac but not that much. I've got a power fc which has a digital display of the water temp and the highest i've seen is about 94'C and that was highway cruising. Doing old pac, nasho and a track day has never seen it go past about 86'C so I definatly think somethings wrong.

Is your radiator fan always running? or are you running a thermo fan?

If its all a fairly stock cooling system I would get someone to at least change the coolant and if it doesn't cost to much change the thermostat too. Once you've done that it shouldn't overheat at all.