VW Passat B5.5 Radiator Bleed!

ardle1

I was changing the Thermostat on my Passat last night and wanted to bleed from radiator, I slowly released(what I thought was)the bleed 'screw' and all I got was a very 'tight' hissing and a little green liquid, no rush off water.... Anyway I quickly tightened it back up and walked away, I just let the coolant flow from thermostat housing.... Does anyone know what this 'bleeder' is!.. Circled in Red.

Interslice

ardle1 wrote: »

I was changing the Thermostat on my Passat last night and wanted to bleed from radiator, I slowly released(what I thought was)the bleed 'screw' and all I got was a very 'tight' hissing and a little green liquid, no rush off water.... Anyway I quickly tightened it back up and walked away, I just let the coolant flow from thermostat housing.... Does anyone know what this 'bleeder' is!.. Circled in Red.

Looks like your air con. Bleed screw will be at the highest point maybe on the pipes going through the bulkhead to the heater matrix.

ardle1

Interslice wrote: »

Looks like your air con. Bleed screw will be at the highest point maybe on the pipes going through the bulkhead to the heater matrix.

Ok, am I in troube so! I let a fair bit off air/gas out.... Doesn't matter to be honest, I also changed my alternator belt, and didn't replace the air-con belt.. But I'd like to know for future reference. Thanks.

Interslice

ardle1 wrote: »

Ok, am I in troube so! I let a fair bit off air/gas out.... Doesn't matter to be honest, I also changed my alternator belt, and didn't replace the air-con belt.. But I'd like to know for future reference. Thanks.

Probably just have to get the air-con recharged if it doesn't work. I'd be more worried about bleeding the air out of your coolant system properly. I normally run it up to full temperature, turn the heater to hot and then bleed the air out through them top heater hoses going through the bulkhead, while squeezing all the lower pipes.

visual

The easiest way to bleed the coolant is to take the cap of coolant expansion reservior tank.
Allow car to get up to normal tempture with internal heating on max. Air will rise to highest point the reservior tank.

Allow system to cool down and top off coolant replace cap. Over the next few days keep eye on coolant level and top up if needed.

Air con you will need to bring this to a garage to have it vacuum pumped and refilled.

visual

The easiest way to bleed the coolant is to take the cap of coolant expansion reservior tank.
Allow car to get up to normal tempture with internal heating on max. Air will rise to highest point the reservior tank.

Allow system to cool down and top off coolant replace cap. Over the next few days keep eye on coolant level and top up if needed.

Air con you will need to bring this to a garage to have it vacuum pumped and refilled.