Originally Posted by NORTY FLATZ
(1) Likely a fair amount as the trailing shape of a wheel is round.
(2) Please don't say that a radiator must be totally blocked for it to saturate the heat.
(2a) Let's say we both know only a partial blockage can/will cause an issue.
(3) Your system hasn't reached saturation point.
(4) Your "airlock" is likely cavitation.
1, still rubbish. The guard extension is too far away from the rad to make an ounce of difference.
2, saturate heat? You mean overheat. No I don't.
2a, I agree.
3, what are you on about with this "saturation point"? The cooling system reaches a temperature (103C I think on these) that'll trigger the cooling fan to kick in. My system has got hot enough for me to feel the heat blowing onto my legs (the known hot air problem) So I reckon it's got as hot as it can. The fan comes on and the gauge stays at 5 bars. Therefore my system is working as it should. The OP's system does not.
4, rubbish again. You don't get cavitation in a radiator/cooling system. You get an airlock likely in one of the pipes/tubes which prevents the liquid circulating around the whole system. That airlock allows steam to form which then expands and blows coolant past the rad cap. Cavitation = http://en.wikipedia.org/wiki/Cavitation