Fuel vapourisation

[100SRV]

Hello,
I have a fuel vapourisation problem on my 1958 Land Rover and would appreciate some assistance in identifying a remedy. Details:

Thermostat is 84°C
Cooling system is standard except now it has a Kenlowe electric fan instead of the mechanical propellor. It didn't suffer from vapourisation at all before the electric fan was fitted. I tried turning the "on" temperature for the fan down but it didn't make a lot of difference.

The engine is a standard 2286 OHV with an Automotive Conversions cylinder head and manifolds fuelled by an SU HIF44. The fuel pump is the standard mechanical lift pump and there is no return on the fuel system.

When the engine cuts out (after being stood for about 1/4 hour following a run) I remove the fuel feed from the carb and work the lift pump lever until fuel appears, this takes about five minutes.

The lift pump is hot to the touch, about the temperature of a drinkable cup of tea.

Advice on solutions gratefully accepted!

100SRV

[Steve_D]

Have you tried removing the fuel filler cap?
Fuel should come through with 2 or 3 pulls on the pump so I suspect either a fuel blockage or lack of venting to the tank.

Steve

[100SRV]

Hi,
good idea, I will check that!

[100SRV]

Hi,
I changed the thermostat to 74°C and tweaked the electric fan to operate at around 80°C and the problem hasn't returned so far.