406oc.co.uk

Hello.

I am new to this sight so go steady. I have a y reg 406 hdi which has been running great for the two years i have had it. Until the low water light came on. Checked under the bonnet to find water leaking from the heater matrix exit pipe, where it joins the next pipe which has the air bleed cap.

So far i have changed the air bleed pipe which hasn't fixed the issue. To be honest the pipe doesn't fit that tightly even after it has clipped into place. is that correct?
Trusted garage said they thought it was the metal heater matrix pipe. i am not sure, could it be this?

Have found a very helpful video on you tube on how to get access to the matrix and so my question.

Is the pipe meant to fit really tightly or should it move a bit. left to right, not forwards and back.
Could the metal pipe have a split? It is a constant dripping meaning i loss half a litre in 30 miles.
Is it hard to change the metal pipe?
Should i bother or should i use some rad weld?

thanks

David

David,

Not sure on the layout for your car but as far as using rad weld I'd be inclined to use JB weld instead if you can track the leak to metal pipe.
Rad weld will float around the system looking for narrow passages it can block up, JB weld goes where you put it.

Good luck

Gareth

the pipes have an o ring in the joint if they break down the pipe becomes loose and leeks

Hi. I have a new pipe with a new o ring. Still leaks.

I don't like using rad weld or other stuff but i am stuck at the moment.
not sure if to bother trying new metal pipes or not.

Is there different sizes of pipe? I did get it from Peugeot so i would hope they would know what was appropriate for my car?

Any other suggestions would be great.