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Car Forum / Land Rover Cars / December 2006quick acting heater solution?
Most modern diesels have a heater pre heater, which is an ally housing with 3 glow plugs in it. I'm thinking of fitting one to my 90 non turbo D the only problem I can think of is the current draw (possibly up to 60A). Mine only has somthing poxy like a 45A alternator so my battery is possibly going to go flat in the long run. I supose it will only need to be on for 5 mins just to get enough temperature to demist/defrost the screen on a cold morning. Anyone tried it, any comments/thoughts? -- Jon > I'm thinking of fitting one to my 90 non turbo D the only problem I can > think of is the current draw (possibly up to 60A). Is it a fixed fan blade or a viscous one on a 90 that old? If fixed, try fitting a viscous or electric fan, that would allow the engine to heat up quicker.  SignatureBlast off and strike the evil Bydo empire! > Is it a fixed fan blade or a viscous one on a 90 that old? If fixed, > try fitting a viscous or electric fan, that would allow the engine to > heat up quicker. If the thermostat is working properly, the type of fan should make no difference. > If the thermostat is working properly, the type of fan should make no > difference. If the vehicle is mostly pootling around at low speeds, then air flow through the rad from the fan would be significant, at which point the type of fan would be significant, but certainly not so much the case on faster trips where the air flow through the rad is mostly due to forward motion. SignatureBlast off and strike the evil Bydo empire! >> If the thermostat is working properly, the type of fan should make no >> difference. [quoted text clipped - 4 lines] > on faster trips where the air flow through the rad is mostly due to > forward motion. But the point is, if the thermostat is working properly, there would be no water flowing through the radiator until the engine has warmed up, so the airflow across the radiator is irrelevant, as is the type of fan. > But the point is, if the thermostat is working properly, there would be no > water flowing through the radiator until the engine has warmed up, so the > airflow across the radiator is irrelevant, as is the type of fan. Certainly, but people who fit radiator muffs seem to find the car heats up quicker in the morning so I can only assume that the restriction of airflow through the engine bay has a useful effect. SignatureBlast off and strike the evil Bydo empire! >> But the point is, if the thermostat is working properly, there would be no >> water flowing through the radiator until the engine has warmed up, so the [quoted text clipped - 3 lines] >heats up quicker in the morning so I can only assume that the >restriction of airflow through the engine bay has a useful effect. Indeed from experience, that is the case. My first 90, a late '84, 2286 petrol, had a fixed fan, and the airflow across the engine block alone was considerable. A full rad muff really did make a difference! Neil (Reply via NG please) > Most modern diesels have a heater pre heater, which is an ally housing > with 3 glow plugs in it. [quoted text clipped - 7 lines] > -- > Jon What about putting a larger tube over a part of the exhaust pipe and blow fresh air in one end and then this air will be heated by the exhaust and duct this in to the cab.... sounds like a cool idea ( or a hot one ) WARNING : to do this you must ensure NO exhaust gasses can enter this " ducted air " as it would then gas you !!!!!!!! The old VW beetles use to do this with fins round a part of the exhaust which was in a casing, then the fan which was used to cool the engine was ducted through these heat exchanges and blown in to the interior.. worked very well got real hot.. Rich > What about putting a larger tube over a part of the exhaust pipe and blow > fresh air in one end and then this air will be heated by the exhaust and > duct this in to the cab.... sounds like a cool idea ( or a hot one ) Pinz and VW campers do this, someone suggested recently that fitting a VW camper van heat exchanger to the landy heating system would make the cab heat up faster. I know that now I've drained all the water out of my pinz heating system the hot air starts coming out a lot faster than it does on my defender. Heating air in a water-cooled car relies on the engine getting hot, heating water, and the water heating the air, all this takes some time but an exhaust-mounted heat exchanger only waits for the exhaust to get hot, which happens much faster than the engine and coolant getting hot, and the exhaust then heats the air. SignatureBlast off and strike the evil Bydo empire! > an exhaust-mounted heat exchanger only waits for the exhaust to >get hot, which happens much faster than the engine and coolant getting >hot, and the exhaust then heats the air. The exhaust manifold on my car gets hot enough to burn your arm on in around 1 minute or so!... >> an exhaust-mounted heat exchanger only waits for the exhaust to >>get hot, which happens much faster than the engine and coolant getting >>hot, and the exhaust then heats the air. > > The exhaust manifold on my car gets hot enough to burn your arm on in > around 1 minute or so!... Well that's it then a bit of fining on a bit of the exhaust pipe and a case round it no one should ever complain that their series is cold again :-) bring on the cold weather. Rich |
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