Heater only blows out cold air.

[D1andonlyantman]

And after taking the drive home the heater is definitely warmer! I'll do a complete flush this weekend. I'd say my heater troubles are well on the way to being sorted  cheers for the help (and patience) everyone

[mcgee9t2]

when i did mine to make sure all was new i drained it. filled up with just water, ran for a min or two to get it mixed. drained again. filled with water, ran for a min to get it mixed, then drained a few letres out and put a few letres of coolant in to get the correct concerntration.

if there is any old stuff in there its seriously waterd down becuase the water drained looked like it was streight out of a tap, no dirtyness/ murkyness/ coolant colour etc.

[D1andonlyantman]

Yeah I'll give it a good flush this weekend after my mate fits my brembos On motorbikes they say to add some white vinegar while flushing to help clear any crap and give everything a good clean. Anyone ever heard of that in cars?

[WadGTI]

Yeah I'll give it a good flush this weekend after my mate fits my brembos On motorbikes they say to add some white vinegar while flushing to help clear any crap and give everything a good clean. Anyone ever heard of that in cars?

Use mcgee9t2 method above. I have used a coolant system flush agent before and will never use one again (other than a fresh rebuild).