How To Test Heater Radiator For Leaks?

[omri617 18]

Fitting the whole heater and blower unit , before I do , want to make sure that heater unit doesn't have any matrix leaks. How do I do it??

Thank you!

[welshpug 1,656]

fit a new matrix and o-rings

[omri617 18]

Where and which diameter are they?

Heard that a common failure of the 205 is the heater unit.?

[omri617 18]

connected a water hose to it from the garden and ran water on mid-low flow , didn't see any leaks yet.

should i block the other pipe when i do it? in normal working condition , is there fluid pressure in there? or just water that flows and goes back to the engine bay area?

[EdCherry 34 1 Cars]

If you can pressurise it (14 psi or roughly 1 bar) and stick it in a bucket of water you will find out if the matrix radiator itself leaks.

[omri617 18]

how can i pressurize it?

[jamie_1992 66 1 Cars]

use a bike pump block one hole and put the pump in the other

[omri617 18]

nice idea

can this method also be used to pressurize the coolant in order to check for leaks BEFORE mounting the inlet manifold?

Thanks

[EdCherry 34 1 Cars]

It can aslong as you have completed the system. Try not to go to far above 12-14 psi.

[omri617 18]

thanks again