Header Tank Height

[fry61]

I am probably totally adrift BUT -- if the header tank has a twin seal cap why can't this tank just be used as an extension to the rad & the overflow pipe go to an old fasioned suck & blow bottle somewhere below this tank.

[Guest mcramsay]

I didn't think of that. Maybe I should just top up and run everything like normal?

[Big Jim]

I am probably totally adrift BUT -- if the header tank has a twin seal cap why can't this tank just be used as an extension to the rad & the overflow pipe go to an old fasioned suck & blow bottle somewhere below this tank.

Don't you mean "the radiator cap"?? If so then it certainly could, so long as the water level in the rad is above all water passages in the engine. Triumph 2000's had this fault, the top of the rad was level with the top of the cylinder head, if the water level dropped just slightly, it starved the front end of the head of water and it then cracked between the valve seats.

Edited April 3, 2016 by Big Jim

[Guest mcramsay]

So been having a look, and I think I have decided to swap the radiator for a different shape. The Vw polo rad on rally design http://www.rallydesign.co.uk/product_info.php?products_id=16443

 

Seems to fit the bill perfectly. And will allow the radiator to sit much lower in the engine bay, I can then get rid of the hurrendous top hose bend, which I hate.

[Guest mcramsay]

Do you have any pics of the radiator fitted? I know it's on the zero but would still help. I'm not sure the bog standard ones on eBay will cope with a 3.2 v6 feeding into it. I might have to go for the Ali version with 60mm core