Antifreeze

[monkeyhanger]

I have a JP2 with skin tank cooling. I need to change the blue antifreeze, as it has been in the system for a couple or 3 years. After checking antifreeze prices on Ebay, I notice that pink antifreeze is not much more expensive than blue, and pink has a much longer life span. Obviously, I'd flush the system through first, but is there any reason why I shouldn't change my coolant to pink?

[Tony Brooks]

No reason as far as I can see. Vehicles have far more different metals in contact with the coolant than the average boat. One of my first jobs when I got the boat was to  give it a good flush and change to red antifreeze

[frangar]

In general pink or OAT isn't recommended for systems with copper in them....and most JP's have copper at some point. I checked this with Morris lubricants....they dont recommend the long life antifreeze for vintage engines etc. If this is them just protecting themselves is for you to decide....personally I haven't taken the risk!

 

Edited February 16, 2021 by frangar

[Tony Brooks]

Not doubting Frangar but my Bukh had copper and brass components in the skin tank circuit and over 20 years had no problem.

 

As brass contains copper and some alloy vehicle cooling parts have brass inserts I think we need a chemist to explain why.  Although many engine thermostats are stainless steel nowadays some still have brass components in them.

 

 

[frangar]

1 minute ago, Tony Brooks said:

Not doubting Frangar but my Bukh had copper and brass components in the skin tank circuit and over 20 years had no problem.

 

As brass contains copper and some alloy vehicle cooling parts have brass inserts I think we need a chemist to explain why.  Although many engine thermostats are stainless steel nowadays some still have brass components in them.

 

 

I wondered the same but after a fair bit of reading on various vintage car forums etc it seems that some had issues when using OAT on older engines for whatever reason...I thought that there was long life antifreeze that could be used on vintage engines but if there was I couldn't find it now. Im happy if I could get proof that OAT is fine but as I cant Im resigned to changing it every two years!

[Tracy D'arth]

Central heating antifreeze is generally pink and those systems have copper, brass, aluminium, steel and different types of plastic.

[frangar]

1 minute ago, Tracy D'arth said:

Central heating antifreeze is generally pink and those systems have copper, brass, aluminium, steel and different types of plastic.

Is it based on OAT tho?? That’s the issue rather than the colour....

[Tracy D'arth]

Don't know if its vegan or not. Rice based?

Does this help?

http://www.hastingsfilter.com/Literature/TSB/05-2R1.pdf

 

[monkeyhanger]

17 hours ago, Tracy D'arth said:

Don't know if its vegan or not. Rice based?

Does this help?

http://www.hastingsfilter.com/Literature/TSB/05-2R1.pdf

 

Thanks for the article.  Useful info. Unfortunately, no mention of Lister JP in the article, so I'm still not sure