Xr3i runs warm on tick over and runs just over half when driving have noticed the vacuum advance unit on the dizzy has packed up a ex Ford mechanic said this could cause the car to run hotter would this be feasible 

2 hours ago, Richard boraston said:

Xr3i runs warm on tick over and runs just over half when driving have noticed the vacuum advance unit on the dizzy has packed up a ex Ford mechanic said this could cause the car to run hotter would this be feasible 

The Ignition Timing will be not be advanced enough under certain conditions and it could cause it to run a bit hotter but I would expect other symptoms like poor fuel consumption and maybe rough cruising as well.

There are probably other age related issues but I would have thought that for a car of that age the Distributer and its Vacuum Advance unit would have been common to a lot of cars so you should be able to find a replacement.

If you do get hold of a second hand Distributer I would only change the Vacuum Unit because the Mechanical Advance unit will probably not be the same. 

I'd be more inclined to believe it was a weak/lazy thermostat, clogged rad and matrix or weak pump or even clogged block.

That's what I'd be investigating first

XR3i What?

I’ve give it a good flush out have put a QH thermostat in it pump is new rad is new changed temperature switch was going to buy a stat and switch off motor sport development and try that 

Oh it’s a 1989 xr3i MFI

 

What’s the best product to give it a good flush out