Thread: D1 300 Tdi - heater tap

Hi, I was wondering if I could install a heater tap into the Tdi heater system. I would prefer not to have the hot water inside the cabin if at all possible as it adds to the heat load on the A/C considerably, especially since the flaps on the heater don't seam to seal as efffectively.

The easiest way is just to bypass the heater - but I do use it in winter. I would prefer an automatic system that shuts off the water flow to the heater when I dial it to cold, but opens it up when it's dialled to hot - from what I can tell that's how the V8's work but would I need to also have a bypass system to keep the water flow correct?

Anyone done this and what parts do I need?

Thanks Utemad, that's exactly what I want to do, just having the heater inside the cab adds to the heat - if I could reduce the flow of hot water into the cabin automatically then it will certainly help the a/c. Thanks for clarifying that I need to keep the water flow going - not just block the flow it like on most cars.

I'll see if I can get one from an earlier Discovery today.

Pierre, I have dual aircon in mine, and it works adequately, but I always have a hot leg from the heat coming off the heater core - the console area around the my left leg is pretty warm and that's from the heater core. When I switch the a/c off like when I'm driving in the mornings then I can feel the heat coming from the core.

My Audi, Jag, Toyota all have a heater tap that stops the flow when the full cold is on - no problems with corrosion on any of those cars. If I keep the right concentration of corrosion inhibitor in the coolant, there should not have any corrosion problems.