AO Silver Member
Join Date: Mar 2003
Location: Dublin, Ireland.
Re: Fuse problem!!
V6's run hotter than other engine types. Probably because of the overlapping piston firings.
On most cars, the 'normal' running temperature is 80oC ,+/- 3oC. This is measured from the block (???) and is a few degrees different to the coolant coming out of the engine block and hitting the thermostat.
Thermostats typicaly start opening around 85-90oC, and you should see the temp of the engine reaching approx 90oC before the fan turns on. It will run for ~30 seconds, enough to bring the temperature of the water on the output of the rad to approx 80oC.
I will have to read up on the second stage of the fan, I think it comes on at 95oC or something, and that's because that point is when the thermostat is at it's fully open position, and needs max air-flow to cool...
As an aside, boxers can be run air-cooled provided fins are located on the outside of the block. Their flat opposing layout allows quite a lot of cooling.
They also loose heat very quickly if left off, compared to in-a-line engines!
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