How to replace the coolant flange

[GTIEagles]

My car has been slowly loosing coolant since I changed the inline thermostat, I initially thought that it was leaking where I changed the spring clips for jubilee clips but they all seem fine. So I had another look and sniff round and it appears to be leaking at the coolant flange above the gearbox. Has anyone tackled this job before and knows what's involved?

[dazza]

Are you getting any coolant on the floor? I also think i may have a leak since changing the water pump, main stat and inline stat. Unless its just the coolant settling after the initial refill as i've not topped it up since.

[GTIEagles]

No coolant on the floor, just weeping from the flange itself.

Must be someone out there that has changed one before?

[Hawkes41]

I changed mine about a year ago. It wasn't too difficult, just quite time consuming. It's just a case of removing everything above it to get access. I removed the battery as well to make it easier. You must make sure that the o-ring is seated correctly inside the head when installing the new one! Mine wasn't so I had to take it all out again!