TVR Tamora - spitting out coolant

[michielp]

Hi,

My Tamora has no expansion tank, only the swirlpot.
If I fill it till about an inch under the neck (as the manual says), if it gets hotter around 90 degrees it will start spitting out coolant via the blue cap.

Is that due to it being overfilled? because it expands and need to go somehwere.
How to determine the right amount of coolant in the swirlpot?

Is there a kit available to add an expansion tank, any tips?

regards Michiel

[michielp]

Thanks all,

It indeed seems to be that i over filled the system.
But because of the warmer trips I am making this summer, I have added an expansion tank connected to an earlier style VW pressure cap which has an overflow pipe.
Just back from Le Mans Classic, traffic jams around Paris in 35-40 degrees, the system behaved perfectly.
No more coolant spitting, at first the expansion tank almost emptied, now the level is consistent.

Michiel

[michielp]

Just been on a short holiday, I will take some pictures and add some part numbers later this week.

[michielp]

The cap is from early volkswagen transporter (FB 02213) van as far as I know. Seems to be working as a treat. The expansion tank is from amazon it has a inlet/outlet on the bottom I have drilled a small hole in the cap to relief any pressure as that is held by the VW cap at max 1.1 bar.