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  1. #1
    Wrath's Avatar
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    Heater Core Flush

    Realised on a long journey "farn sarf" that my climate control doesn't provide much heat, it's lukewarm at best. After ignoring the missus going on about "there's cold air hitting me again" for a few weeks, I finally realised she was right....but don't tell her.

    I want to try flushing the heater core but I have two questions:

    1) Halfords sell a VW 5ltr bottle of coolant, how much coolant is required from empty? Do I need that much or can I get some VW stuff off ebay in 1.5ltr bottles?

    2) Where is the easiest place to get the required hose. It looks like I need 20mm/21mm or 22mm diameter hose but clearly don't want to buy an entire reel for 50 quid?
    Nathan

    Red Audi A4 B7 S-Line with Leather/Alcantara interior

    Current Mods: Painted Brake Calipers, Gear-driven oil shaft assembly, RS4 grille, Debadged, B8 MFSW, Cruise Control, RS4-style Fog Surrounds, Satin Black Cupra R Splitter, RS4 RARB, Clear Corner headlights, 2011 RNS-e, MTEC Drilled and Grooved Brake Discs.

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  3. #2
    raffhussain's Avatar
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    Hey wrath, u won't need much g12. Your are just flushing the heater core which won't have much g12 standing inside it. The water passes through the core and back to the engine. If you flush on cold engine the core will have minimal water in there. When you flush the water standing in the core will come out along with gunk. No water will leak from the inlet and outlet pipes so you won't lose much coolant. Try a lock DIY store for some pipe. If you can't get any then just do it without the pipes. I did this for a friend and it was fine. He didn't lose much coolant and it worked fine.
    CURRENT CAR: AUDI A4 B6 1.8T QUATTRO SPORT

  4. #3
    Wrath's Avatar
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    Cheers mate. Managed to get some pipe so will try this shortly.
    Nathan

    Red Audi A4 B7 S-Line with Leather/Alcantara interior

    Current Mods: Painted Brake Calipers, Gear-driven oil shaft assembly, RS4 grille, Debadged, B8 MFSW, Cruise Control, RS4-style Fog Surrounds, Satin Black Cupra R Splitter, RS4 RARB, Clear Corner headlights, 2011 RNS-e, MTEC Drilled and Grooved Brake Discs.

  5. #4
    Wrath's Avatar
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    After borrowing some tools from B5Nut, got the top pipe off (took half an hour!), got the battery out (which nearly broke my back) but couldn't remove the lower pipe. Tried for half an hour but got worried I was going to split the hose. Put it back together and will go forward with B5's suggestion to remove the lower radiator hose and flush the whole system. At least in that case I will be removing all the crud.
    Nathan

    Red Audi A4 B7 S-Line with Leather/Alcantara interior

    Current Mods: Painted Brake Calipers, Gear-driven oil shaft assembly, RS4 grille, Debadged, B8 MFSW, Cruise Control, RS4-style Fog Surrounds, Satin Black Cupra R Splitter, RS4 RARB, Clear Corner headlights, 2011 RNS-e, MTEC Drilled and Grooved Brake Discs.

  6. #5
    Wrath's Avatar
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    Update: Wasn't straightforward, had to remove the thermostat and one of the torx is in a crap place. Managed to flush the system out properly, refilled (took about 2L G12++ and 2L water thereabouts). Heater works wonderfully now!
    Nathan

    Red Audi A4 B7 S-Line with Leather/Alcantara interior

    Current Mods: Painted Brake Calipers, Gear-driven oil shaft assembly, RS4 grille, Debadged, B8 MFSW, Cruise Control, RS4-style Fog Surrounds, Satin Black Cupra R Splitter, RS4 RARB, Clear Corner headlights, 2011 RNS-e, MTEC Drilled and Grooved Brake Discs.

 

 

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