The V8 Owners Forum -

Hi again guys, Just a quick one as I got a few minutes to have a look over the cooling pipework again today. Should the feed from the heater matrix go in to the upper or lower inlet point? And the feed comes from the rear of the inlet manifold correct? Then returns along the rigid pipe in to the suc...

Hi Chodjinn, My inlet manifold doesn't appear to have a connection anywhere on it for a breather to be connected, I am a little reluctant to drill and tap it for this purpose, if I have to then I will. I have a pressure cap on top of the expansion vessel, the expansion vessel is the original 1978 MG...

Hi Denis, Thanks for your input, sorry for any confusion I have caused at the start of the thread, I have an expansion vessel rather than a header tank. So I have no point B, my expansion vessel only has one inlet near the top of the brass tank, which has a tube that runs down inside the tank to nea...

Thanks Chris,

I'll try filling this way and see how I get on.

Another stupid question if I may, when the engine is running, if I remove the expansion bottle cap, what would be expected to happen?

Thanks again!

Hmm, I was hoping I had completely ballsed something up and it wouldbe obvious to everyone! lol I wonder if it is something to do with my filling technique, or lack of. What would be the best way to fill such a system? I filled the expansion bottle time and time again then blew it down using my mout...

Hi again Chris, I have spoken to people who do this conversion at MGB Hive where I get a lot of my parts from, and they use the same expansion bottle as I am using, but they use the V8 rad, the only difference is where the inlet/outlet ports exit on the rad, the core is the same as the rad that I ha...

Hi Chris, That thread does indeed help, I am now wondering whether to fit one of those top hose joiners complete with pressure cap? Would this be suitable to feed to my expansion bottle connection? (which is also fitted with a pressure cap) I'm guessing so? Then the small stubby outlet from my expan...

Hi Chris, Thanks for your reply, perhaps I am getting confused with my tanks, the tank I have is the original '78 MGB tank, it only has one connection high on the side of the tank, there is then a pipe running down inside the tank to near the bottom. The tank is brass, and is fitted with a pressure ...

Hi guys, I am sure someone here on the forum can help with this, I must have something wrong as the engine is overheating pretty quickly and water doesn't seem to be circulating around the whole system. http://locostbuilders.co.uk/upload/3V8.jpg The car is fitted with a header tank as high as I can ...