Noisy pipes inside cabin

[rickprice]

In my passenger footwell are two pipes that get bloody hot after a while. I understand they go to the heater to 'supercharge' the hot air coming in over the V8 and warm it even further.

Mine a fair amount of 'air-bubble' kind of noise - sounds like air being rattled around. This is mainly when cold, and upon acceleration.

Should I start losing sleep, or saving up for a nasty shock?

Or is there a little trick to bleed the system? If it were really easy, and didn't involve losing the skin off my knuckles, that'b great.

As if...;)

Cheers,

Rick

[V8 Animal]

Mine done it on the odd occasion.
As for a bleed screw mine is on the top corner of the drivers side of the rad.
When car is running and warm gently open the bolt coolant should dribble out if it bubbles then you have air in the system.
Let it drain untill clear if a lot comes out check swirl pot level.
V8 Animal