I’ve a 1996 1.8 Mk1. The original radiator split recently, and I’ve replaced it with a new aluminium one. At the same time I changed all the original coolant hoses, replacing them with silicone ones from Stoney Racing. ‘SR’ advise that not all types of antifreeze are compatible with silicone hose…

FL22 is an ethylene-glycol based, proven coolant without, amines and silicates Most current anti freeze should be compatible with silicone Coolant Type Silicone Hose Compatibility Ethylene Glycol (EG) = Excellent Propylene Glycol (PG) = Excellent Organic Acid Tech (O…

[image] MK1 Coolant - Silicate or no Silicate Engine, Transmission, Exhaust etc I’m due to drain flush and refill the coolant in my Mk1. Having scoured the forums and internet in general, I’m still left looking for a short and conclusive answer to a coolant question: Is S…

I was advised on OAT coolant in a Westfield I built would be an issue, even though the factory supplied silicon hoses and I followed suit with other hoses to not be rubber. I regulary checked them internally and never saw any degradation of the hoses and never seemed to suffer any issues.

[image] chris-reeves: Is FL22 suitable for a 1996 Mk1? To get rid of any trace of ‘what’s in there now’, I need to flush the block - can I do this with tap water, ie: fill the system, run the car and then drain it? Yes, FL22 is suitable to use in a 1996 MK1. I personally wouldn’t worry too …

Thanks for your really prompt reply - I’m glad I’m not the only person who’s been reading forums, got confused and been left wondering! Chris

Thanks! I guess you can’t be too careful - damaging the hoses is one thing, but damaging ‘something else’ could be more of a problem to fix… Cheers! Chris

Thanks - I think you’ve answered both my and CBRDeano’s questions! The reason I was going to flush the system is that I don’t know what was used the last time the coolant was changed - it was red, but dirty. So I was going to fill the system, run the car to operating temperature to get the heater …

If the stuff in there is red, dirty or not, then I would flush it. I’d actually drive it for a bit, allow it to heat cycle a few times rather than just let it reach operating temperature, before draining and refilling too.

Okay … out of interest, ‘red’ being…? I’ll certainly heed your advice though! Thanks!

[image] chris-reeves: …‘red’ being…? Purely because it’s a different colour and mixed with green could look nasty again. Doesn’t red and green make brown?

Mk1 antifreeze with silicone hoses...?

Technical Area Engine, Transmission, Exhaust etc

CBRDEANO 3 September 2024 10:18 3