Vy LS1 overheating

[Erin curley]

Hi guys
I have a 03 VY LS1.
I have replaced the water pump, thermostat,hater unit and t piece that was leaking . Car has run like a dream for months without losing any water.
Til this week when in traffic she naturally gets a little hotter. When it did fans kicked in and brought her back down again.
Now it's spiking above that..fan is still working but won't come down until I get air flow again .??

Any advice on trouble shooting would be a great help.
Could it be temp switch? Or second speed on fan not engaging?
Or radiator?

Thanks in advance

 

[markalan1two]

what condition is the radiator in?

 

[Erin curley]

Tbh .think it may be original radiator.. no leaks from the rad .

 

[Erin curley]

Thanks for the thought.
I will be starting by flushing the radiator on the weekend. Then replace Thermostat and bleed. Will post my progress. Hopefully that solves it.

 

[45WW]

Sounds like you could have a pocket of air trapped in system