Measuring Coolant Temperatures

[flint54]

I gave in to the urge and bought a Fluke 62 Mini IR temp gauge (with laser pointer).

 

I find that my dash gauge is surprisingly accurate, depending on exactly where else

I measure. When dash gauge says 210 deg, I read 205 deg on the T-stat housing,

200 deg on the upper hose immediately connected to the housing, and 220 deg on the

brass body of the sensor screwed into the housing. Surprisingly (to me anyways),

the upper hose temp drops to 185 deg at the radiator, and the lower hose temp measures

175 deg coming off the radiator. I was surprised to drop only 10 deg through a new

(OEM) radiator with both fans running, until I ran across this article that suggests a 10 deg

drop through the radiator is typical. The article also discusses other aspects of cooling

system design, including instances where changing the flow rate may be warranted.

 

http://www.enginebasics.com/Engine%20Ba ... oling.html

[Boots]

Interesting