All sorted, caps in place, coolant reloaded and bled. Van working perfectly again. Coolant system is working just fine.

The reason for wanting to disconnect it is because the metal pipes feeding the rear heater are corroded and in the 10 years I've had the van I've never used the rear heating ...

Yeah, that picture is for the cap that's under the passenger seat side. It's the other cap that I'm not so sure about.

As I say, my guess is the back of the t junction on the other side, but it'd be good to confirm with someone before I start tinkering...

Hi,
had some rather heated trouble with corroded pipes recently, so decide to block off the rear heater matrix. I've bought a blanking kit from mr maynards lovely shop, which is the official mazda thing, with simply 2 caps to go on the pipes feeding the matrix, .

But, my question is where on the ...

a full pipe replacement would be nice, but just looks like one helluva long job as it is such a long & twisty pipe. Hence the alternative replacement tee-piece looks so tempted...just an evening lying on my back. :D

I found some nice looking stainless tee pieces online somewhere that looked good ...

Hi Phil again (sorry, new account, old one got messed up),
my temporary epoxy bodge worked, but now it's time to do it properly as still dripping a bit.

My question is, what are the size (internal/exernal diameter) of those coolant pipes? And what size is the straight rubber hose that is needed to ...