[Estate87]

Originally Posted by Laird Scooby

Most, if not all our Volvos (in this section of the forum at least) would have left the factory with ethylene glycol. They do not mix. The acid in the Organic Acid Technology causes the silicates to precipitate out of the EG and form a gel commonly known as silicone sealant. It blocks all the waterways, radiators, heater matrices, cylinder heads, blocks and so on.

Also most, if not all, engines made before 2000 didn't have gaskets that will resist the acid in it.

Then there's the corrosion. Not so applicable to the white blocks but it will attack the cast iron blocks in things like the B200, B230 etc. It was actually developed by the Japanese in the late 90s for use in their all-aluminium engines because EG antifreeze was also corrosive to aluminium but nowhere near as much as OAT is to cast iron.
Granted the white block engines are all-aluminium but if they were supplied from new with EG, unless you strip that engine to its bones and renew every single gasket after cleaning every single waterway (including the heater matrix and radiator, any other ancillaries that use coolant (eg the turbo on later 940s etc) meticulously, there will be traces of EG left behind which can form the gel with OAT.

There's plenty more i could put but my paws won't let me type anymore at the moment, those are enough good reasons not to use it anyway!

Top man

Thanks for all that info. Very helpful once again.

Cheers