warming up too quick

Post by **campbell** » Sun Jul 15, 2007 10:15 pm

graeme wrote:Robin, you've hit the nail on the head. It had a coolant top-up about 2 weeks ago, and I can tell they didn't use the oem stuff as tis the wrong colour. This coolant gets hot quicker = buckets of antifreeze in it...

Didn't mention that as I had no idea that different coolants behave differently...

Cheers,
Graeme

They need to very, very sure to only ever, ever use green antifreeze in your car. Anything else is just a fashion disaster.

mac · Post by **mac** » Mon Jul 16, 2007 8:55 am

Wonder if they used same stuff that was in it?

Could answer the whole normal + OAT = ??????? question

Mac

Rich H · Post by **Rich H** » Mon Jul 16, 2007 8:58 am

I thought that OAT+MEG=sludge=damage???!!

robin · Post by **robin** » Mon Jul 16, 2007 9:26 am

The internet folklore has it that mixing OAT and Austrian wine gives you sludge.

The OAT producers say it's OK to mix OAT & "normal" anti-freeze.

The sludge is supposedly caused by mixing hot OAT & air - you can test this out by heating some OAT in a sauce pan and see what happens ... my guess is you'll get porridge.

You can then repeat with OAT & your existing anti-freeze to see what happens ... my guess is you'll get sludge both ways ... but I have never done it, so cannot say.

Now OAT and EG antifreeze have the same specific heat capacity, more or less. What would make your coolant less effective is not so much topping it up with the wrong colour stuff, but using neat anti-freeze instead of diluted anti-freeze.

Even then, they would have to have tipped in quite a lot - in which case, your real problem isn't what colour your anti-freeze is, but where is the old stuff going!

Cheers,
Robin