Heat exchanger insulation - worth the bother?

Discussion in 'Mech Tech' started by Molteni Mike, Sep 28, 2016.

  1. Wrapping the exchangers won't cause the engine to overheat.
     
    paradox and the 3 crispies like this.
  2. How did they stick the insulation to the inside of the heat exchangers ? I am going to attack some genuine type 4 ones tomorrow. ??
     
  3. Was there any? The only insulation I've seen is a kind of outer jacket.
     
  4. yep hang on will nip out for a pic type 4 though
     
  5. You used to be able to get little coat things that went on them
    "Heater boosters "
    I think they were called
    I remember the advert sort of like the ones you used to see in the Sunday papers
    :lol:
     
  6. [​IMG]
     
  7. about 4mm thick i reckon, is it jut held in by the fins or glued ???????????????????
     
  8. Ooh.
     
    3901mick likes this.
  9. It's aluminium backed heat proof matting . Mine was stuck in a few places to the outer casing ....I took one of mine apart to repair and weld new flanges on ....a lot of work
     
    3901mick likes this.
  10. Zed

    Zed Gradually getting grumpier

    There's a thin sheet of aluminium to keep insulation from the airways between the fins.
     
  11. silicone carbide;)
     
  12. Zed

    Zed Gradually getting grumpier

    Eh?
     
  13. silicone carbide
    yeah?
     
    Zed likes this.
  14. No SiC in my HX ?
     
  15. I wouldn't wrap the exhaust pipes on a bus engine
    It's designed to cool the pipes as they leave the head to keep cylinder head temp down
    This is why the heat exchangers dump hot air when you select the flaps closed


    Sent from my iPhone using Tapatalk
     
  16. Agreed, but the question relates to insulating just the exchangers. The repro ones are made of junk metal, would covering them accelerate rusting :thinking:
     
  17. Yes, most likely.
     
  18. The question was is it worth the bother. Assuming the repro (poor quality and inefficient) ones are staying, then the extra heat gained at the front can only be found out by trying out some insulation of various types and thicknesses.

    It does sound worth a go just for the fun of it.
     
  19. I wrapped my stainless J tubes and that was hard enough to do let alone wrapping the HX .seems a lot of work for no gain
     
  20. its a bit LIKE HEAT RESISTaNT PAINT , it works perfect till it heats up . the smokes then smokes the , bejesus out of the vehicle , none of it works , exhaust and heat exchangers heat uo to near melting , so nothing works
     

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