Hi guys- as a longtime lurker and first time poster, I have a BIG problem....

I had to replace my 99 Octavia Tdi's heater core/matrix recently....It was a huge job.....very time consuming......

managed to scource a good quality OEM replacment heater core for €30.....that looked identical to the cars original VAG one

After hours of reassembly of the heaterbox and dashboard..., I attached the coolant hose connections to newly installed heater core. ... One started leaking immediately...drip...drip....drip...

My question is....Are these plastic heater hose connections single use only?

can you replace them with jubilee clips?

I guess as a last resort, I could use a hacksaw off the heater core cannection flanges.. and use some jubilee clips..But would prefer to do a proper job,,,

In this U-tube video, you can see these plastic heater core connections....at 54 seconds....Can anyone give me some advise please?

http://youtu.be/pjVhFHz7xE

http://youtu.be/pjVhFHz7xE

Hi and welcome aboard.

Welcome to Briskoda. I recommend that you repost your query in our Octavia I forum where it will have higher visibility.

I had the same issue when I did the matrix on mine (2001 Octavia) they are not once only use but have o rings, if you remove them you will see the o rings.

Welcome to the site.

I had the same issue when I did the matrix on mine (2001 Octavia) they are not once only use but have o rings, if you remove them you will see the o rings.

Welcome to the site.

Thanks for that.......Will buy some new o rings and report back......I read smearing some silicone grease on the o rings helps em to seal......

be careful with that as if you put too much in it could block the matrix in places if some breaks free. new rings even slightly fatter ones would be best smeared with undiluted coolant

I would not use grease, just replace the o rings.

Thanks lads....New O rings worked a treat...... my cooling system...is watertight again...

I was kinda worried that I had purchased and gone to all the trouble of fitting a duff heater core/matrix :think:

Hello SurferDude and welcome along

Glad you got things sorted