Rydlyme

[Keith 1]

Hi again .
Has anyone used this descaling agent !
If so, did it work for you ! And if so, how long did you run it before getting any good results.
Does it work with cold water or has it to be warmed up to engine tick over temp.
Your thoughts are welcome.
Thank you.

[beamishken]

Originally Posted by Keith 1

Hi again .
Has anyone used this descaling agent !
If so, did it work for you ! And if so, how long did you run it before getting any good results.
Does it work with cold water or has it to be warmed up to engine tick over temp.
Your thoughts are welcome.
Thank you.

Rydlyme is based on hydrochloric acid which is brick acid or patio cleaner works well cold but obviously far cheaper to just use brick acid which is what I do

[Keith 1]

Sds included wow .
Thanks beamishken .
Well that shocked me how was your results did it actually leave salt deposits in the container that you used or does it dissolve completely.
I see you just down the road from me .
I'm in Glasgow.

[Pikey Dave]

Originally Posted by Keith 1

Sds included wow .
Thanks beamishken .
Well that shocked me how was your results did it actually leave salt deposits in the container that you used or does it dissolve completely.
I see you just down the road from me .
I'm in Glasgow.

Personally I wouldn’t be letting hydrochloric acid anywhere near my aluminium engine. We used to use brick acid for cleaning up spidge that we’d brought up when diving wrecks, it was frightening the rate that it ate through any bits of ally that got into the mix. I would want it extremely diluted to the point where it may as well be chip oyl vinegar.

[beamishken]

Originally Posted by Keith 1

Sds included wow .
Thanks beamishken .
Well that shocked me how was your results did it actually leave salt deposits in the container that you used or does it dissolve completely.
I see you just down the road from me .
I'm in Glasgow.

It just dissolves most stuff although you get some deposits washing out. Most of the marine "miracle" cleaners are based on everyday chemicals, hull cleaners are often oxcalic acid but any chemicals need to have a publicly available msds sheet so its not difficult to get an idea on what stuff is based on, sometimes need to look at foreign msds sheets as they need to contain more detail than dome domestic ones

[Keith 1]

So getting back to rydlyme .
Does it do the job without damaging the alloy parts.
Or a no no

[beamishken]

Originally Posted by Keith 1

So getting back to rydlyme .
Does it do the job without damaging the alloy parts.
Or a no no

It will remove oxidation which looks like its eating the base metal but its actually just removing the surface corrosion even strong concentration brick acid doesn't seem to harm good ally, I've used it neat to clean aluminium beam screed bars & apart from brightening up the surface it doesnt seem to harm it apart from the corroded areas. If your concerned then acetic acid or oxcalic acid will remove salt & are less aggressive. Barnacle buster is the other marine descaleing product but its based on phosphoric acid so no getting away from acid based products. Good thing is once washed with water the acid is easily neutralized

[smallribber]

Worked well for me

https://www.youtube.com/watch?v=wowDWWOqqs8

[Keith 1]

Thanks for all your inputs I'm not really sure what to use now.
After I changed the impeller all seemed good and it had a very good spurt but as soon as it ran for about a minute it dropped to about half the output not sure if this is the norm .
This was run in a large dustbin not muffs. .
But it seems more powerful than before.

[whiskylee]

Originally Posted by Keith 1

Thanks for all your inputs I'm not really sure what to use now.
After I changed the impeller all seemed good and it had a very good spurt but as soon as it ran for about a minute it dropped to about half the output not sure if this is the norm .
This was run in a large dustbin not muffs. .
But it seems more powerful than before.

Have you removed the thermostat to check to see if they work, you will have an insight into salt build up if you remove them

[Peter_C]

Get a wire and stuff it into the stream with it running. If it clears even for a few seconds there is debris plugging the line. I've found sea shell bits and sand plugging the stream which won't be dissolved easily. Not hard to pull the stream hose off the plastic end thru the cowling, with the boat off, and look inside.

If it were me I would be pulling a hose or fitting and looking inside the passages before inducing chemicals.

[Keith 1]

I decided that's what I will do tomorrow.
Pull the pipes away and take a look at the thermostat and housing.
The gasket looks fairly new.
It has 2 tell tails next to each other one is always faster than the other .

[Limecc]

Rydlyme worked well for me, took the thermostat out and ran the engine. Left old zincs in the bottom of the bucket and it seemed quite kind to those while being brutal to the limescale. There's a promotional video on Youtube where someone has it in the palm of their hand with some scale fizzing away. I certainly wouldn't try that with brick acid.

[beamishken]

Originally Posted by Limecc

Rydlyme worked well for me, took the thermostat out and ran the engine. Left old zincs in the bottom of the bucket and it seemed quite kind to those while being brutal to the limescale. There's a promotional video on Youtube where someone has it in the palm of their hand with some scale fizzing away. I certainly wouldn't try that with brick acid.

You get various strengths of brick acid if you look at the msds sheet I posted it gives the percentage of hydrochloric acid in rydlyme you just dilute the brick acid accordingly

[Keith 1]

Well I took the pipes off and the thermostat it all looks kinda fine to me internally. Could not find any excessive build up anywhere.
The thermostat housing was a bit messy but not to much
The thermostat itself looks a bit bent not sure if that would make difference but I'm going to order kit anyway.

[Keith 1]

These Re the pics

[Keith 1]

I just noticed the gasket doesn't look to clever

[Pikey Dave]

Originally Posted by beamishken

You get various strengths of brick acid if you look at the msds sheet I posted it gives the percentage of hydrochloric acid in rydlyme you just dilute the brick acid accordingly

I think even brick acid is only around 20% HCL & it’s scary stuff. I “inherited” a glass carboy of HCL of indeterminate strength, when you take the top off, you get a greenish vapour coming off as it reacts with the moisture in the air & it stinks to high heaven. I used it, well diluted, to clean diving spidge.

[beamishken]

Originally Posted by Pikey Dave

I think even brick acid is only around 20% HCL & it’s scary stuff. I “inherited” a glass carboy of HCL of indeterminate strength, when you take the top off, you get a greenish vapour coming off as it reacts with the moisture in the air & it stinks to high heaven. I used it, well diluted, to clean diving spidge.

20% hcl is about the strongest brick acid you can buy just poured neat brick acid on these two heads, you can see it fizzing on the stones then the pictures after a hose off, as you can see its removed the calcification but not harmed the base metal although it will show up pits that may previously have been hidden by the corrosion & it might find leaks that were previously plugged by corrosion & calcification but its not actually damaging good material. Not sure what it will do if left for a long period but left for the time it takes to remove calcified salt & corrosion it seems fine

[smallribber]

This might also be of interest to you. Remember the Tell tale is just that if no water out of it it does not mean you cooling water is not flowing fine

https://www.youtube.com/watch?v=iTxzUcsPmFI