3VZ strange overheating issue just

[cdwood2010]

Oh that I get, but the MR2 doesn't have a route back. The expansion bottle is like one of those wee bottles they give you in hospital.

[Paul Woods]

Seriously chris just trust me mate, the cap flows both ways.

[cdwood2010]

Fairy nuff, wasn't saying you made it up, I seriously didn't know it could do that.

[Paul Woods]

If it didn't have a route back your engine would gradually dump all of its coolant into the bottle which would overflow very quickly, think about it.

The pressure cap is bi - directional, trust me.

[cdwood2010]

Oky doky.

But last time I trusted you I woke up in a dress with a sore bum.

:)

[Paul Woods]

That's cos you're bi - directional too.

[cdwood2010]

Well bugger me. (no not you). I just had a go at a rad cap with a small screwdriver. There's a small hole in the centre of the pin, and the central cap bit on the bottom has a secondary spring allowing it to open..

I really fucking hate you, you smug know-all bastard.

[Paul Woods]

My work here is done.