Hi,my 416si 1997 has a cooling problem.Heater works fine and top of radiator gets hot.I have replaced thermostat but still have no heat in the pipe leading from this,any ideas please? When i turn heater of water backfills to water inlet at top.

Brian Edmunds, January 2009

I had same problem with a Ford a mechanic at work said it's most likely and air lock which does prevent the water circulating.

or you may have fitted the wrong thermostat. Try this leave the filler cap off run the enging on tick over if an airlock the water will bubble and the level drop so have some WARM water to top it up don't forget the antifreeze if you are in the COLD UK.

Tip: If you ever have to top up a hot engine with cold water make sure you SLOW POUR IT or wait for engine to cool down. from works mechanic.

Nobby, January 2009