1. Home
  2. Automotive Technologies
  3. 97 Cav Overcooling on interstate

97 Cav Overcooling on interstate

This is the 2.2 OHV with an electric fan.

We have changed coolant and thermostat, and electric fan operates after idling for a period of time Temp is fine summer or winter driving around town, comes up to temp quick and stays there.

Now that it's freezing cold outside, on the interstate in overdrive the engine is cooled to the very bottom of its operating range, there is no heat in the cabin and it's not good for the engine. As soon as we get off the highway it warms back up and stays there until we get back on the highway.

We blocked off most of the radiator with little change in the temp.

Any other ideas? I am guessing since it's still overcooling when the tstat is presumably closed, that means that air flow into the engine bay must somehow be obstructed without obstructing the air intake. Not sure how to proceed.

Reply to
runderwo
Loading thread data ...

Try a new thermostat at the highest operating temp recommended. Even with a small engine 'air-cooling' shouldn't keep it from reaching temp if the thermostat is operating correctly.

Reply to
RayV

I would check your thermostat and make sure it closes properly.

Reply to
marks542004

Especially check to see if, when you replaced the thermostat, you used one of the fail open types. I have heard a lot of people complain that these sometimes fail fully open even when there is no obvious overheating incident. If you have one of these, replace it with a traditional 'fails and burns up your engine' type;>)

Reply to
<HLS

Good idea, I believe it is one of those fail safe ones, I had not heard of such problems until now but it makes sense.

Reply to
runderwo

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.