Technical coolant

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Technical coolant

According to Fiat it's ok to use pink coolant in ( older) systems designed for blue, but you can't use blue in a system designed for pink coolant.
In fact, Fiat doesn't stock blue Paraflu anymore, they put pink Paraflu in all engines, new and old.
I've switched several Fiat's and Alfas from blue to pink Paraflu without any problems at all ( after a good flush of course)
 
Of course Kev! (y) There's a waterless debate on a Classic Panda thread too!

I prefer to rely on Selenia's technical bulletins as well as other published scientific research. Did I mention the other thread where this was debated - maybe I forgot..... ;)

Have we argued about Ethanol in Classic cars yet, or is this definitely ok too? :bang:

I must dig out that mid 80's official chart from Fiat as to which engines could use unleaded & which might be ok if you didn't rev them too much. That was good clear advice (y)
 
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NEVER EVER use distilled water in cooling systems!


Use bottled water, a big bottle from Aldi costs next to nothing and it'll be way better.
 
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Also the debate between Blue and pink/red coolant. . .
Pink/red, has a surface tension reducer added to it, which for air release and metal surface cooling it's fantastic, because you have less/no (if possible) liquid surface tension you dont get air pockets, if you mix hot metal with air and water you get cavitation, the cavitation causes a tiny bead blast effect over a long time, the anti corrosion agents in blue coolant have to work twice as hard, that's why it wears out/contaminates faster hence needing changed more often,

So why not use Red/pink in pre90's cars?
The reason is the tolerances are bigger, water pumps/rads/hoses car leak also if you have a head gasket on the edge it'll make that worse and possibly finish it off.

So Red/pink is better . . but you take the chance.
 
strange you should mention that...i was talking to vern yesterday about 4 star and what you do with your 127, 45 etc....so whats the official line?

Hi Kev,

Ok the 1049cc 127's are meant to be leaded. One had an unleaded conversion years ago (hardened valve seats) one doesn't. This runs fine on unleaded - it will have "lead memory" for at least 20k miles anyway and unlikely to show any damage for at least 100k - not a worry as it's going to outlast me at 1k a year!!

The old 903cc in the 127 was listed as can be run on unleaded but may need to retard the ignition & Fiat advised against lengthy runs at constant high speed. Never come across one with a problem from unleaded.

The chart I have from c1986 shows the Panda 900 as suitable for unleaded as is the Uno Formula 45 (same 903 engine).

My blue 45CL was always run on an additive but doesn't need it, and I have forgotten to keep using the stuff which came with it! If you're worried use an additive but it's a tried & tested engine which is likely to give no problems on unleaded in its normal lifetime - as a late mk1 they are likely to have been sold as fine for unleaded anyway. Hope that helps (y)

Edit: I can only find the chart for current (as of c1986) vehicles. I'm sure I've got a full one listing the older models somewhere, but I'm not organised enough to find it! :doh:

Edit of edit: purple haze - yep the 45 was listed as unleaded ok :worship:
 
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thank you for the explanation. I don't mind any repeating - I need all the help I can get!
When you say there will be coolant left in the block and in the heater, so bear that in mind when you mix the coolant -
As that should be a 50/50 mix as well, what do you mean?

I was thinking that if you've done a flush through before refilling you would probably have a litre or two of fresh water resting in the system, therefore your top up mix would need more antifreeze than water. Of course if you haven't flushed then yes, 50/50 is fine. (y)
 
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