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Cleaning water galleries
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Miken



Joined: 24 Dec 2012
Posts: 266

PostPosted: Wed Jul 04, 2018 10:00 pm    Post subject: Cleaning water galleries Reply with quote

I have the cylinder head removed from my iron block side valve engine.
Before I put the lid back on I was thinking about filling the coolant gallery with a rust remover to try and remove many decades of rust. Maybe phosphoric acid or something like this:
http://www.derek.com.au/evaporust.html
which is available on ebay.
Any thoughts?
Mike
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Ray White



Joined: 02 Dec 2014
Posts: 3195
Location: Derby

PostPosted: Wed Jul 11, 2018 11:04 pm    Post subject: Reply with quote

I have been investigating Evaporust and it looks like the product you want is something they make called "Thermocure". It is a coolant system flush which from reviews I have read seems to work much better than other flushing products on the market. I haven't tried Evaporust Thermocure myself yet but I may well give it a go because it seems to be a good product.

It is available from Frost but it can also also be found on Amazon.

NOTE: If it turns out that the C715 Thermocure is exactly the same as the original C700 Evaporust then it is much more expensive for the same thing in a different container. They are probably different products but I just don't know for sure.
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alastairq



Joined: 14 Oct 2016
Posts: 1263
Location: East Yorkshire

PostPosted: Thu Jul 12, 2018 7:04 am    Post subject: Reply with quote

Having done a bit of breakfast-time research, it appears to me that
https://www.frost.co.uk/evapo-rust-super-safe-rust-remover-946ml-us-quart.html
the C700 Evaporust, is a diluted liquid, used as is.

https://www.frost.co.uk/thermocure-cooling-system-rust-remover-flush-946ml-us-quart-5398.html
C715 Thermocure appears to be concentrated, and needs mixing 1 quart to 1 gallon of water, in the cooling system.

The latter may be a much stronger solution, perhaps?
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alastairq



Joined: 14 Oct 2016
Posts: 1263
Location: East Yorkshire

PostPosted: Thu Jul 12, 2018 7:38 am    Post subject: Reply with quote

As an aside.has anyone tried any of the domestic central heating cleaners in a vehicle cooling system, to de-scale, de-sludge, etc?

For example, Fernox F3 or F5?

{I'm thinking about the multitude of different metals...as found in domestic central heating systems, may be relevant to old vehicles as well?}
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Phil - Nottingham



Joined: 01 Jan 2008
Posts: 1254
Location: Nottingham

PostPosted: Thu Jul 12, 2018 6:08 pm    Post subject: Reply with quote

I have heard Dishwasher tabs are good but not convinced as to their effect on alloy components eg pump case, head and intake/outlet pipes. I have used hot Vinegar - neat which clears scale well
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