phil Dean Posted August 26, 2023 Author Report Share Posted August 26, 2023 Ok I have now taken the radiator out and although I have put a hose pipe thru i and it runs ok I will still get it checked out. On Rich suggestion I have removed the block drain plug because there was no lever left on it broken of and jammed I removed the whole plug. No water intaily came out of the hole but after poking about with a sharp pointed screw driver and then a small plastic rod water started to come out. When I put hose pipe water thru the top hose it ran out a a stream not blasting across hitting the inner wing but more than just dribbling. I did wonder would I get more pressure by taking the thermostat housing of and forcing water in that way or even thru the bottom hose. Inside the plug /tap I found what looked like very fine casting sand. !! also in the whole it self. I am sure that I haven't totally solved the problem so I have heard of people using house radiator descaler. How do you use this do you put it in and leave it for a couple of runs out then drain it. Also I won't be putting the drain tap back but a bolt, does anybody know the correct size and is it best to use brass. It looks like 1/2 UNC. Quote Link to post Share on other sites
Z320 Posted August 26, 2023 Report Share Posted August 26, 2023 (edited) 1/2“ UNF on the block. I use an adapter 1/4“ BSP x 1/2“ UNF to fit a common small ball valve Edited August 26, 2023 by Z320 Quote Link to post Share on other sites
BlueTR3A-5EKT Posted August 26, 2023 Report Share Posted August 26, 2023 I used 1/2” unf x 3/4” stainless steel hexagon screw and reduced the length. https://www.kayfast.co.uk/view-product/UNF-Hexagon-Set-Screws-A2-Stainless-Steel Quote Link to post Share on other sites
Z320 Posted August 26, 2023 Report Share Posted August 26, 2023 Just tested, after 6 years the tap still drains the block….. Quote Link to post Share on other sites
phil Dean Posted August 26, 2023 Author Report Share Posted August 26, 2023 Is it really UNF both ideas look good. However the job has just got more complex. I've been taking the small hoses off the heater box and its not just the inlet hose thats leaking but the box it self I have already ordered a single speed heater from NT I presume I am right 4A are just single speed , it certainly gets toasty enough with it switched on. Anyway has anybody got written instructions on how to get the heater box out. The manual just explains how to put one in I suppose I could just reverse the process but it might be easier if I could start the right way round If you I know what I mean. By the way Peter I have used Kays for years good company. If you are ever looking on ebay for acertain bolt screw or nut and can't find it phone kays they will give you the correct ebay number so that you can order it on ebay. Phil Quote Link to post Share on other sites
RogerH Posted August 26, 2023 Report Share Posted August 26, 2023 (edited) Hi Phil, when removing the there are three screws on the tgop flange that you access from below. Have a look here for any clues https://www.tr-register.co.uk/forums/index.php?/topic/72918-heater-fan/ Edited August 26, 2023 by RogerH Quote Link to post Share on other sites
Z320 Posted August 26, 2023 Report Share Posted August 26, 2023 I had the heater box and heater out to inspect and clean - while I had the dashboard out. I don’t know if you get it out with the dashboard still in. Quote Link to post Share on other sites
RogerH Posted August 26, 2023 Report Share Posted August 26, 2023 10 minutes ago, Z320 said: I had the heater box and heater out to inspect and clean - while I had the dashboard out. I don’t know if you get it out with the dashboard still in. The heater comes out with equal ease with dashboard in or out. Roger Quote Link to post Share on other sites
RogerH Posted August 26, 2023 Report Share Posted August 26, 2023 (edited) 3 hours ago, phil Dean said: Ok I have now taken the radiator out and although I have put a hose pipe thru i and it runs ok I will still get it checked out. On Rich suggestion I have removed the block drain plug because there was no lever left on it broken of and jammed I removed the whole plug. No water intaily came out of the hole but after poking about with a sharp pointed screw driver and then a small plastic rod water started to come out. When I put hose pipe water thru the top hose it ran out a a stream not blasting across hitting the inner wing but more than just dribbling. I did wonder would I get more pressure by taking the thermostat housing of and forcing water in that way or even thru the bottom hose. Inside the plug /tap I found what looked like very fine casting sand. !! also in the whole it self. I am sure that I haven't totally solved the problem so I have heard of people using house radiator descaler. How do you use this do you put it in and leave it for a couple of runs out then drain it. Also I won't be putting the drain tap back but a bolt, does anybody know the correct size and is it best to use brass. It looks like 1/2 UNC. Hi Phil, this is what you can find around #4 liner And what it should look like Try and find the drain hole !!!! Roger Edited August 26, 2023 by RogerH Quote Link to post Share on other sites
phil Dean Posted August 28, 2023 Author Report Share Posted August 28, 2023 (edited) Got the heater out. Top left hand bolt/screw was a pig to get at and kept making cracking noises squeky bum time but kept slowly undoing loads of wd 40 then 1/4 turn to retighten then undo a bit further took 1/2 hour but more prefreable to a sheard bolt. see pick below whats the bracket on the front of the heater box for should you feed the heater and choke cable thru there!!! Edited August 28, 2023 by phil Dean Quote Link to post Share on other sites
RogerH Posted August 28, 2023 Report Share Posted August 28, 2023 Radio support Roger Quote Link to post Share on other sites
phil Dean Posted August 30, 2023 Author Report Share Posted August 30, 2023 Ah that makes sense Thanks Roger. Quote Link to post Share on other sites
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