How hot does your 116 run?

[pez]

Zedster, you are in fact running too hot I would say based on your photo.

Get that radiator re-cored. It's cheap and easy to do. Just pull the radiator and take it to a good radiator shop [I'm sure they are a dime a dozen in Vegas.]  Have them put a desert core in ... it can be done, I had mine re-cored with it. Basically, it is just one more core - a 4 core instead of a 3 core, so greater cooling and fluid capacity.

Also, wire in a simple switch to allow you to short to ground [causing the aux fan to come on]. This will be useful when you are stuck in traffic and want your a/c to stay cold.

You may also want to consider swapping all your coolant for a product called Engine Ice, which is pre-mixed. I use it on my motorcycle and it works great.

[zedster]

I do not doubt your knowledge as I am no mechanic but could it be anything else? The other day it stayed around 200 and below when I ran it. When I had the fluid flushed and changed the gauge was reading close to 250 (maybe air)? Temperatures where taken all over the engine at that time and they were like 180. I know the thermostat that was put in was of a different temp.

[TJ 450]

Is it mainly at idle when the temp gets that high? My 450 got up to the line between 175 and 250 in your pic just sitting in traffic today. I think my clutch fan is showing its age.

Tim

[zedster]

Yes this was at idle sitting at the end of the driveway for a bit.

[pez]

TJ makes a good point to check the clutch on the fan. Also, you mention that a different temp thermostat was installed - what temp? To my knowledge, they all should be 75C on the M117 motor.

200F is fine occasionally, but not really much higher at all, even in Vegas.