hi all
ok this is my input (going on the same looking thing as on my car, and how mine operates, I used this to make a heated filter back in the day, kieth did the thread 14/16mm I think?) the picture below looking at it, the 2 threaded ports if left open on a car *NO OIL WOULD COME OUT* so this is a heat exchanger in itself, so no need to add a second heat X taken from a boiler, then you would plumb that to the main fan/blower.
couple things to work out:
thread size on original VW lump where the filter goes, and does the oil ring and adapter have the same thread (had this problem on the heated filter we made)
also, I think a header tank would be a very good idea for filling/expansion-pressure release/antifreeze filling/get air out, higher than main system/easy fill location
two stage switch??? think I would look into variable/rheostat, better control of environment and ambient temp.
I have a similar system under my campervan seat, I don't think it has a switch inline to kill flow its constant, but aslong as fan isn't on cab doesn't get hot. (mine is basically on or off, space heater) it has more attached but think they never connected all the gubbins etc... but still works well in conjunction with main van blkower.
the pump seems abit overkill, maybe a smaller water bottle type etc? all I think is needed is a steady flow, which brings me onto volume of liquid try keep down to the minimum (less to heat/faster heat up times)
another Q is what temp does a VW engine get to???
as to dickjotec and would the water cool the oil too much I doubt this, the engine is the constant it would be just like adding another ltr of oil or 2, but I do take on board the fan speed will try to cool the water as it blow heat off the radiator part inside the blower, but I think the engine will win hands down!
