V8S gets scary hot

[bicycleRepairMan]

Hi

I have a V8S.

The temperature gauge goes scary high! Cruising along, the needle sits almost horizontal - just below 90. But, sat in traffic (or on the drive) the needle goes way up into the red. The fan _does_ kick in, but only once the needle is almost off the top of the red. If I turn the engine off once the needle is above 90ish, it won't restart for a minute or two, probably due to a fuel vapour lock.

I've bled the radiator and the swirl pot. The radiator does get hot, so I believe the thermostat is opening correctly.

How high does your temperature gauge go? What does the temperature gauge show when the fan kicks in? (assuming you don't have an override)

I might just swap out the fan switch - Race Tech sell two replacement fan switches, one "early on", part K0094A and one "normal", part K0094B. Have you any experience with these switches?

Cheers


Ian

[bicycleRepairMan]

• UPDATE **

I spent some time annoying the neighbours running up to temperature with Rover Gauge connected.

With the bonnet open, the temperature goes to 93C, the fan comes on, and the temperature drops to 92C, the fan turns off, the temperature goes to 93C. And this cycle continues indefinitely.

With the bonnet shut, the temperature continues to 95C, even though the fan came on at 93C.

The whole time, the rover gauge temperature matched the dashboard gauge temperature.

I'm thinking the system is only just coping, so when I'm in traffic the temperature is going even higher.

As a start, I'll try check the thermostat is a "big bore", just incase the wrong one is fitted, and maybe change it....


Ian