Coolant boils at shutdown, worry or not?

[zpiloto]

Originally Posted by Erik

No, I don't know at what temp the fan is supposed to come on on this car, on my last Honda, it kicked on at about 60% up the gauge.

My fan thermostat is bad, so I rigged a switch up so the fan is either on or off (the previous owner had it wired so it ran all the time the ignition switch was on).

I leave the fan switched off, sometimes for a week or two at a time. I only switch it on when my temp gets up to about 90% on the gauge. That has only happened while sitting in city traffic. It doesn't get up quite that high on the interstate.

The boiling at shutdown will occur even when the temp is only halfway up the gauge. I can try to turn the fan on 1 minute before shutdown and see if this helps.

My main concern is for the wear and tear on my engine.

I'll let someone with a Honda chime in but I wouldn't let it get above 60%. With the cars I've had (mostly non-hondas)the temp gauge never moves between 165-225 and then it starts moving higher quickly. I wouldn't want the temp above 215 for long periods of time.