Mo Murphy Posted July 18, 2017 Share Posted July 18, 2017 Does anyone have any ? Anything to look out for ? Mo Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted July 18, 2017 Share Posted July 18, 2017 I managed to resurrect a near completely blocked rad once by taking it off the car, filling it with water, shoving the air line in one end to introduce a bit of bubble based agitation. It helps if you can seal the end with the air line in and tip it up a bit. Repeat a few times and you might get lucky like I did. 1 Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted July 18, 2017 Share Posted July 18, 2017 I've found oxalic acid very good: http://www.ebay.co.uk/itm/1kg-Oxalic-acid-Hull-Deck-GRP-Cleaner-rust-remover-/130672302665?hash=item1e6cad1a49:g:IVgAAOSwBLlVACMc Only attacks the rust, leaves bare steel and aluminium alone, very gently otherwise as it is used as wood bleach. It is what you find in Holts Radflush etc, but with it in powder form you can do it so much more cheaply and with a stronger solution... 1 Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted July 18, 2017 Author Share Posted July 18, 2017 Thank you Gents ? Mo Quote Link to comment Share on other sites More sharing options...
neil110 Posted July 19, 2017 Share Posted July 19, 2017 I have a permanently fitted inlet point in the return hose from my heater. Plug your garden hose into it and turn the water on, remove the filler plug at the top of the rad and everything gets back flushed out of the system 2 Quote Link to comment Share on other sites More sharing options...
HampshireHog Posted July 19, 2017 Share Posted July 19, 2017 Mo , don't get the stuff on your hands , or anywhere else for that matter . Being a smart arse I didn't pay any attention to the normal health and safety blurb when stripping some old oak doors not only does the made up solution burn like buggery on bare skin the dried powder left behind is nasty and also burns like buggery if it gets into your eyes , nose or mouth , ive been told since it rehydrates and is still quite effective as an acid . HTH . 2 Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted July 19, 2017 Author Share Posted July 19, 2017 Thanks for that, hog. Neil do you have a pic of said access point, that sounds like a good idea ! Mo Quote Link to comment Share on other sites More sharing options...
Snagger Posted July 20, 2017 Share Posted July 20, 2017 I have used caustic soda solution will good results. A 5-10 minute soak followed by thorough flushing got a lot of rubbish out. 1 Quote Link to comment Share on other sites More sharing options...
monkie Posted July 20, 2017 Share Posted July 20, 2017 I think it is important to second what HampshireHog says: take precautions if you use either of the chemicals suggested as they have the potential to do some serious harm, not only are they corrosive but they are also toxic - face and hand protection is an absolute must. Caustic soda is okay in moderation for the block but may start to attack none ferrous materials if you make up a too concentrated solution that will be hot or leave it too long. I appreciate these substances are often in solutions you can buy but they will be in a controlled formulation of known concentration. I found some quite big lumps of rubbish can be got out of the block if you take out the larger core plugs on the side of the block and get a pressure washer in there to blast the rubbish out. 2 Quote Link to comment Share on other sites More sharing options...
Snagger Posted July 20, 2017 Share Posted July 20, 2017 14 hours ago, neil110 said: I have a permanently fitted inlet point in the return hose from my heater. Plug your garden hose into it and turn the water on, remove the filler plug at the top of the rad and everything gets back flushed out of the system Could you post a picture of that connection, please? I sounds like an eminently sensible mod. Quote Link to comment Share on other sites More sharing options...
neil110 Posted July 20, 2017 Share Posted July 20, 2017 (edited) It is from a kit I bought at Walmart during the period I lived in America. If you screw the cap off, you can then screw on a small yellow fitting, the garden hose clips onto that. I would imagine that most of the bits would be available from your local garden centre. Alternatively it may be possible to order it from Walmart. https://www.walmart.com/ip/Prestone-Antifreeze-Flush-and-Fill-Kit/16817507 Edited July 20, 2017 by neil110 1 Quote Link to comment Share on other sites More sharing options...
Snagger Posted July 20, 2017 Share Posted July 20, 2017 Is the cap sealing the tee-piece, or does it have an internal valve? Is that the windscreen washer hose wrapped around the outside? Quote Link to comment Share on other sites More sharing options...
neil110 Posted July 20, 2017 Share Posted July 20, 2017 (edited) The cap is sealing the T piece and has never leaked a drop in the umm 5 years it has been on there. yes that is the windscreen washer hose wrapped around the heater pipes. Keeps it from freezing in winter and seems to help the screen wash cut through the grease/sap better during summer.. Some of those kits on the bay of flea as well. https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313.TR0.TRC0.H0.TRS0&_nkw=Prestone+Antifreeze+Flush+and+Fill+Kit&_sacat=0 Edited July 20, 2017 by neil110 1 Quote Link to comment Share on other sites More sharing options...
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