Quote:
Originally Posted by Hooverfull
So I got my handy Fluke infrared temperature gun. I ran the car on the freeway again and replicated the problem. When it was hot, about 110. I pulled the car over and took some temperature readings. Auxilary fan was not running. Here are the readings in Celcius.
Upper coolant hose: 72.222
Lower coolant hose: 58.8
Radiator reservoir cap: 62
Cylinder 1 head: 82.2
Cylinder 3 head: 94.4
On radiator: 84.4
So, any ideas? Is my temp gauge off? It is important to mention I saw some relief pressure coming from the overflow cap, indicating it is actually that hot.
Will investigate some more, and get the oil analysis before I start dumping money in it. I know this can be characteristic of the 603, but is a bit extreme.
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Quote:
Originally Posted by Brian Carlton
The highest temperature with the infrared gun is 94C. The dash gauge is reading 110C.
Clearly, either the sending unit (most likely) or the gauge is in error by a serious amount.
Sure, it's "that hot" being 94C. But, it's nowhere near 110C.
You don't have any head gasket issues.
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For the cost it would certainly be worth trying a new temperature sender.
Is it possible for a temperature sender to work correctly up to a certain temperature 80°C for example and then send an inaccurate signal as the temperature of the engine rises?
Hooverfull can you repeat the scans with the IR gun when the gauge in the car reads 80-85°C or whatever the gauge reads during normal conditions?
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