05-05-2018, 08:44 AM
For some reason the heater matrix on my gti won't bleed as well as the one in my HDI.
I found that after bleeding the gti I could hear water moving under the dash (heater matrix) on start up meaning there was still air trapped there and the only way I could think to get that air out was by sticking a tube over the bleed point at the back of the bay, it filled with coolant and feed a smaller tube through it in to the coolant pipe work. As soon as the smaller pipe got to the air it came out through the smaller pipe.
It was a pain to do but it sorted out my issue.
I hear vacuum filling/bleeding is the best way to fill a system with the least way of getting air trapped.
I found that after bleeding the gti I could hear water moving under the dash (heater matrix) on start up meaning there was still air trapped there and the only way I could think to get that air out was by sticking a tube over the bleed point at the back of the bay, it filled with coolant and feed a smaller tube through it in to the coolant pipe work. As soon as the smaller pipe got to the air it came out through the smaller pipe.
It was a pain to do but it sorted out my issue.
I hear vacuum filling/bleeding is the best way to fill a system with the least way of getting air trapped.