red or blue coolent in corolla from halfords or toyota?

They're different. Whether or not it'll matter on a 94 is a much complicated question

Toyota use 4life coolant which IIRC is red. The name 4life indicates it is a long-life coolant and it's probably worth getting the proper stuff, as long as the car isn't leaking it all out again!

Recently asked for some ForLife from Toyota, I was asked "red or green?" - amazed me as I thought they only did red too. (It's actually called LongLife now :-/ )

The message from "Johnny" contains these words:

A nice robust red, please.

Possibly one is based on Alcohol, the other on Glycol. Glycol or glycerine based antifreezes being more expensive. Just make sure the one you use is compatible with ally engines, rads, or cyl heads, and is changed at it's recommended intervals. Mike.

Not so sure about an alcohol based anti-freeze; whilst alcohol might supress the freezing point it's not going to offer an awful lot in terms of anti-boiling protection. I suspect that both red and green are ethylene glycol based and the differences lie in the corrosion inhibitors and other additivies present. are the reason for different coloured antifreezes.

Andy

You may well be correct. I was just offering one possible explanation for the two different colours. I can assure you though, that ethyl alcohol based antifreezes were, if not are, used in vehicle cooling systems. As for 'anti-boiling' protection. Pressurising the system raises the coolant boiling point, but AFAIK adding antifreeze doesn't have any significant affect on the boiling temperature, as compared to plain water. Mike.

The Toyota and other Japanese manufacturers' own-brand coolant is dyed red so you won't confuse it with the blue stuff. It's low in silicates (or something) ans is premixed with distilled water.

Some methanol antifreezes are red in colour but these can cause bad problems in car engines.

My wifes Mazda 323 (and it was actually built in Japan too) has Green coolant.

took up the matter at the local toyotas'. they said red and blue are the same, but dont mix them. why not? so more frowns and consultations. then; red if for jap made toyotas and blue for u.k. made toyotas. the only difference is the colour though. all clear everybody ????

Welcome to the parts desk.

And sanity is lunacy in denial

Not really, as my Toyota is british made and has 'Red' coolant!

jw 1111111 ( snipped-for-privacy@REMOOVEvirgin.net) gurgled happily, sounding much like they were saying :

Because you end up with a horrible muddy purple... Don't you remember playing with plasticine when you were a kid?