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Thread: Is this the best heat exchanger ever?

  1. #1
    Join Date
    Oct 2011
    Location
    Perth
    Posts
    128

    Is this the best heat exchanger ever?

    I haven't yet got my fuel heating system set up the way I want it, as I'm still waiting on some motorised ball valves to arrive. In the meantime, yesterday I was talking to my mechanic about it, and he came up with a very attractive option. X5 beemers run a HE for the purpose of fuel efficiency - he tells me it gets over 100 degrees. It's an enormous unit - about the size of a brick - and works off electricity and coolant. When the engine is first started the electric elements do the heating, and the coolant takes over once the engine warms. But it seems to me that if it does indeed get over 100 deg then the electricity must be providing supplementary heating as well. He did a demo - he started the engine, and within 30 seconds the HE was too hot to touch.

    Has anyone come across one of these before? He tells me they're easy to get 2nd hand and not too expensive.
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  2. #2
    Join Date
    May 2008
    Location
    Melbourne
    Posts
    283

    Re: Is this the best heat exchanger ever?

    Answer: Probably not

    https://m.ebay.com.au/itm/BMW-E53-X5...-/281627214947


    I've never tried one out, bit a few euro mechanics I know reckon that they frequently bypass them as they tend to cause issues (with normal cars running on Dino) due to internal components failure
    1987 Mercedes W124 300D
    1997 Ssangyong Musso Wagon

  3. #3
    Join Date
    Oct 2011
    Location
    Perth
    Posts
    128

    Re: Is this the best heat exchanger ever?

    Thanks for the tip. At $371 AUD they certainly arent cheap, not to mention all the buggerising around with fitting them. I think I'll proceed with the other setup for now....

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