Alex Posted June 7, 2002 Share Posted June 7, 2002 If I do a complete coolant flush what sort of mixture do I want.... I'll get the Toyota Red Coolant stuff, is that premixed? What's the capacity of the coolant system? Should I flush it through a couple of times to get all the cr@p out. Whilst I'm on the subject why is my old coolant an odd brown colour? Is it a rust type deposit? How often should coolant be changed? Link to comment Share on other sites More sharing options...
Digsy Posted June 7, 2002 Share Posted June 7, 2002 Hi Alex, I just had the coolant changed on my car as part of its service. Checking the invoice, it doesn't say what volume was used, but the cost for the premixed coolant was £11.63+VAT I think you used to be able to buy radiator flushes from places like Halfords or Wilco but I wouldn't like to comment on their suitability for modern engines. As for the odd brown colour (ooh, tempted, tempted) I would have thought that the coolant would have had an anti-corrosion agent in it, but we do have cast-iron blocks after all. Could just be down to ageing. UNless big lumps or sludge fall out I wouldn't worry about corrosion too much. How often? Seems to be every 36000 miles, by the book (reading old threads here, not referring to my handbook so I could be a bit wrong). Link to comment Share on other sites More sharing options...
Alex Posted June 7, 2002 Author Share Posted June 7, 2002 Do I just unclip the bottom hose and let it flow out??? Will it all come out of the block ok? Can you tell I've not done this before??? Link to comment Share on other sites More sharing options...
Guest Martin F Posted June 7, 2002 Share Posted June 7, 2002 There is a drain tap on the bottom right hand side of the radiator, but to be honest you're better off undoing the bottom hose as the drain plug will take forever. Don't forget to undo the rad cap (and replace it if you haven't already ) so that your escaping coolant doesn't create a vaccum. Link to comment Share on other sites More sharing options...
Digsy Posted June 7, 2002 Share Posted June 7, 2002 Don't sweat it. I don't work on cars myself anymore (not greasy stuff anyway!) I've e-mailled you the "coolant replacement" page from MKIV.com There's also a detailled description of the whole system in there (runs into about 9 pages). Oh sod it. I'll e-mail you those too! Link to comment Share on other sites More sharing options...
Digsy Posted June 7, 2002 Share Posted June 7, 2002 The diagram seems to show two plugs: One on the engine and one on the rad. Because the J2Z uses an inlet thermostat, would removing the bottom hose only drain the radiator and not the whole system? Hence the need for an engine-side drain too? Alex: My rural dialup connection dropped 80% of the way through sending you the pages from MKIV.com Let me know if you want me to resend. Link to comment Share on other sites More sharing options...
Guest Martin F Posted June 7, 2002 Share Posted June 7, 2002 Originally posted by Darren Blake The diagram seems to show two plugs: One on the engine and one on the rad. Because the J2Z uses an inlet thermostat, would removing the bottom hose only drain the radiator and not the whole system? Hence the need for an engine-side drain too? Yes you will be left with some coolant in the block, which i guess you should drain as well. But have you ever tried to get a drain plug out of a block ? Some can be real PITA's Link to comment Share on other sites More sharing options...
Digsy Posted June 7, 2002 Share Posted June 7, 2002 That's when you need Rob's blowtorch wielding friend! Just keep him away from the front of the engine... Link to comment Share on other sites More sharing options...
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