Any thoughts on the following. I do quite a big mileage, and during the winter months I find that I use an unreasonable amount of screenwash. Unless I am using a very strong mixture the windscreen wash system freezes up. A strong mixture such as 50/50 is expensive especially considering most of the time I am using it to clean the windscreen when the temperature is well above zero.
I have taken a number of temperature readings to identify where the freezing is occurring and have noted the following. The reservoir touches the return hose from the radiator and as such tends to run about 15°c above outside temperature. The pipework to the spray nozzle is within the engine compartment and even at motorway speeds the temperature is approx 8°c above outside temperature. The spray nozzle which is just under the lip of the bonnet (see photo) is not heated at all and I have noted the temperature to be exactly the same as the outside temperature.
Therefor without doubt the problem is due to the nozzles freezing up, this can further be proved by warming up the nozzles with warm fingers (not very practical at motorway speeds :-) I have considered somehow creating a vent to allow relatively warm air from the engine compartment to pass the nozzles, however as the vehicles interior air intake is from this region I am reluctant as I do not wish to introduce engine smells to within the interior. I would therefor like an electrical heater to attach to the nozzle that I could switch on when freezing occurs, any thoughts???? I have thought about using a light bulb as a heat source however this could possibly be too hot and damage the nozzles and the bulb will probably crack and fail when it gets wet.
- posted 12 years ago