Nearly cooked it... Now what?

[-Nemesis-]

Ok, so i mucked around putting my 16" thermo on the inside of the radiator in order to reinstall the A/C condensor (1UZFE in a 1994 Toyota 4Runner)

I flipped the blades, but not knowing you had to reverse the polarity, my first drive at speed got the motor very hot. It almost touched the red on my factory temp guage.

That problems solved, but now i'm just wondering about side effects. Everything seems fine, but i'm wondering what effect it would have had on things like oil etc? And whether I should replace it? I'm running Havoline Full Synthetic oil in it.



Another thing. With it set up as is now, while loading up the motor really well the temperature stays controlled, but it does rise a little. Has anyone got any ideas on keeping it just that little bit cooler (note - testing it today it's almost 40 deg C outside)

It's pretty tight, but I had a few ideas. Like the little thermo thats on the outside of the A/C compressor... Can you make that so it's always on? Or add another little thermo on the otherside blowing in.....?

[ISUZUROVER]

If you allowed the engine to cool down as slowly as possible then it should be OK. Aluminium softens (anneals) when it cools down too quickly.

It might be a good idea to change the oil, you may have evaporated off some of the lighter components.

[-Nemesis-]

Well naturally, as the temp was almost red and climbing I turned it off in case it was about to bust as I thought it must be empty of coolant.

I had it off for about 5 mins with just the thermo going cooling the rad fluid only (turns out it didn't cool it quickly as it wasn't wired up properly )

I started it after about 5 mins and let it do it's thing till it was back to operating temp.....