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Flushing a 1500
November 29, 2018
4:56 pm
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Antony Ryan
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November 28, 2018
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Hi all, I wanted to flush out the cooling system, I started by undoing the drain plug on the block, nothing happened, so I took it out completely, still nothing it’s completely blocked! I have poked about and cleaned tho hole till I felt the bend ,about 1.1/4 but still no sign of water, any idea how I unblock the waterways , thanks in advance, cheers Tone.

November 30, 2018
10:55 am
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Hi Tone

Welcome to the Wolseley Register and to the public forum!

It sounds like your radiator is very heavily clogged up. I think you need to remove it completely and reverse flush it with a high power water hose – a messy operation, but it usually works! I would also suggest you do the same with the engine block.- insert the hose into the bottom hole and blast it with water until it comes out of the top hole. Once you have got some water flowing, reverse the direction of the water flow a few times until it all runs clear. Might also be worth cheking your hoses – they may be dry and hard.

Bob

November 30, 2018
3:09 pm
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Graham Button
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Hi Tone,
In addition to Bob’s suggestions try forcing a high pressure water jet through the tap hole in the block, if it’s still not clear then use a strong central heating descaler but read instructions carefully to make sure it won’t adversely affect things like waterpump components and hoses.
Graham.

November 30, 2018
5:34 pm
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Antony Ryan
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November 28, 2018
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Thanks guys, I’ve tried getting some water pressure where the block valve fits to no avail! I’m a little bit nervous about adding anything to the water, don’t know why!
Cheers Tone.

November 30, 2018
8:04 pm
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Graham Button
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Hi Tone,
I’m afraid there is little else that you can apart from removing the core plugs on the drain tap side of the block to get better access to that side but you will still have the problem of cleaning the other side. Having it proffessionaly descaled will involve removing and dismantling the engine then sending the block and cylinder head to a specialist company with all the expense that this will involve.
The only parts that you could damage by trying my suggestion are the waterpump and hoses all of which are readily available and inexpensive.
Graham.

December 1, 2018
8:58 am
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Chris Arnold
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January 4, 2013
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Hi Tone.
I’ve tried a Phophoric Acid based Central Heating Descalers with good results but a few snags. When I tried it on a radiator alone all went well but when I tried it on the complete cooling system of my 15/60 I got leaks on the water pump and the heater valve. Perhaps the only thing stopping these items from leaking was scale itself and once removed they leaked or perhaps the seals are attacked by the descaler. I feel that, if you could somehow descale the block without the ancillaries then all should be OK and you will be amazed what will come out on the first dose of the treatment. Of course you must be aware that, if any part of the system is not leaking because of scale build up, the descaler is going to cause a leak but this problem was on its way before you started. The descaling firms also sell a neutralising salt to add to the water once you’ve finished and I’ve got some if you want to complete as per instructions..
Chris.

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