Air in the top hose/swirl pot...

[Rob_the_Sparky]

Just a question to see if anyone else has had this.

I have had a Taraka fitted fairly recently (3 or 4 years ago) but even before I had this I had the same problem. I fitted Silicon hoses ~5 years old and at the time I was a bit worried about having bled it right so kept checking the system by squeezing hoses to get the last bit of air out and found that I kept getting air when squeezing the top hose once it had cooled after a run. Since I got the Taraka fitted figured all would be fine but it still does this and it is going on too long to just be trapped air from bleeding the system. I get no loss of water, I have no overheating problems or anything else to suggest something is wrong with the cooling.

Any ideas what might be causing it? Is this just a "feature" of the car having the top hose as the highest point? I.e. best just to ignore it?

[Rob_the_Sparky]

Probably a bit too much water if anything, a between half and 2/3rds full. I was considering whether I should try to remove some. Prior to that it was probably only 1/4 full but I put a bit too much in.

[Rob_the_Sparky]

I'm pondering whether the radiator cap is allowing a vacuum to build up when cooling thus drawing in air. If that were the case it could be from a large number of places. If that is likely then my first target I think will be the pressure cap, it is one from Euro Car Parts, might see if VW still sell them. I guess checking all hose clips might also be worth while.

My other thought is that it is just a bit of air in the top of the pot and I should just stop worrying about it.

Edited by Rob_the_Sparky on Monday 26th June 18:40

[Rob_the_Sparky]

Thanks for the offer Pete, it certainly is time I tried to find a spare moment to come an visit, even if just to collect that under tray for me to put on this winter (along with the new dash).