The real cause of injector rattle?

[JTaylor2005]

That's the thing. I'm not expecting head gasket melting temperatures. I did an 8 mile 70mph run earlier and it sat spot on at 90. I dunno I like messing. Also it's like with maintenance engineers. If one moves to another factory that he don't know and 4 maintenance blokes all say "oh that's just how that machine is" usually he won't question it. I like to because why not

---

All that I have done is the following.

My car used to sit anywhere between 75-85c on the gauge when driving. It used to move up and down quite a lot and never really sat still.

I then changed both the thermostat (cheap one from eurocarparts, never really sat dead on and the rubber seal wasn't tight against the outside of the housing) and the temperature sensor.
When I changed the temperature sensor I cleaned the two mating faces and the old corroded washer was replaced (Bearing in mind the dash gauge relies on the earth from the mating face for it to work)

Once that had been done my car then sat comfortably anywhere between about 82-85c.

Now I have replaced the loose fitting thermostat for a new perfect fitting on it sits perfectly on 90c. Round town like earlier, driving at a steady 30, 50, 60. All bang on 90c.